Illustration by Jan BuchczikDecember 19, 2024 ShareSave Want to stay current with Arthur’s writing? Sign up to get an email every time a new column comes out
spent most of his life on the same working-class street in Barcelona’s El Clot neighborhood
he saw Spain’s bloody civil war taking place literally in front of his house
Some died; others spent years in jail or were forced into exile
an experience that affected him for the rest of his life
Every time he wanted to make a point about society or culture
he read in his local paper an article of mine about unhappiness
“You have a lot of complicated theories,” he told me
“but the real reason people are unhappy is very simple.” I asked him to elaborate
“They don’t enjoy their dinner,” he responded
“But one day a year—Christmas—we got to eat whatever we wanted
That is a somewhat reductive hypothesis about global unhappiness
But he was not wrong in his main contention: Happiness rises
well-being requires that you discipline your will and defer your gratifications
Understanding this and taking action to change your habits can make you a much happier person
Read: The politics of a long-dead dictator still haunt Spain
In the behavioral sciences, the most famous study of deferred gratification is the so-called marshmallow experiment undertaken in 1970 by the psychologists Walter Mischel and Ebbe B. Ebbesen. This research project brought 32 young children into a laboratory
where they were offered either animal crackers or pretzel sticks (the marshmallow was an option that came only in later experiments)
the researchers offered an upgrade: If the children could wait by themselves for 15 minutes without eating the snack
and the researchers left the room and observed each child through a one-way mirror
Ten subjects succeeded in waiting and got the additional snack; 22 of them gave in to their desire and gobbled up the treat before the 15 minutes had elapsed
The researchers’ conclusion was clear: Being able to defer gratification leads to a more successful—and ultimately more satisfying—life
they typically use it immediately to acquire things—because they identify having possessions as a source of happiness
The researchers found that these people were less happy than people who didn’t behave this way
more regulated dopamine release than mice without this skill
Read: Why rich kids are so good at the marshmallow test
1. Think about the future. A research-proven approach to improving your capacity for deferred gratification is to imagine yourself in the future. In 2011, a team of researchers interested in how to elicit saving behavior employed digital aging techniques and virtual reality to enable people to interact with elderly versions of themselves. They found that after doing so
the participants were more willing than other people to accept awards of money at a future date rather than immediately
if you are hankering for a portion of junk-calorie carbohydrates at 4 p.m.
version of yourself who forwent the snack and is hungry for a good healthy dinner
Or say you are in college and have a big exam tomorrow but have just gotten invited to a party: Have a chat with the unhappy future you who took the exam after partying instead of studying
Half of the group were then given an exercise in mindfulness breathing
while the other half (the control group) watched a music video
the mindfulness practitioners were significantly more likely than before to defer rewards (whereas the music-video watchers showed no change)
this second result is not at odds with the first finding: Its conclusion is that being more conscious when you make decisions will lead you to optimize your choices
So you can bring the two injunctions together and combine them to best effect: Think clearly about what you’re doing right now
and then think clearly about how you will reflect on your action later
think about how you are feeling at this moment
or are you just self-soothing with a bit of retail therapy
imagine yourself looking at the sweater in two months’ time
Does it give you delight or remind you that you have to make a credit-card payment
Arthur C. Brooks: Four rules for identifying your life’s work
My father-in-law was right that deferring gratification leads to greater happiness
The good news is that you don’t need to be in the middle of a civil war to make this skill worth cultivating
But I always wondered whether he was right in his specific example: Does snacking lower well-being by ruining your enjoyment of proper meals
I have been unable to find any studies of this precise curiosity
so I had to triangulate some related research findings to come to a convincing answer
Researchers who were studying the eating behavior of children reported in 2017 in the Journal of Nutrition Education and Behavior that kids enjoyed food more when they followed structured meal settings—such as eating at the same times each day and dining in a family setting
They also tended to be less fussy about what they were eating
This is broadly supportive of my father-in-law’s theory
was his complete unwillingness to save money and a reckless openhandedness about spending it
And this negative example supported his theory even more—though in a sad way
as he constantly ducked creditors and struggled to meet his basic needs in old age
Perhaps the inability to save was also an effect of the privations of his 1930s childhood: If you never know whether you’ve got enough to get through the month
Even though he suffered as a result of his spendthrift ways
I took a valuable lesson from his example in this too
So my seasonal advice: Go to your holiday dinner good and hungry
But don’t buy your holiday feast on credit
is an apartment block in Valencia's historic El Cabanyal neighborhood which has been under threat of demolition for 20 years
Gypsy families have occupied and restored some of the empty apartments in El Clot
where they live in poverty and under threat from law enforcement
El Clot neighborhood has virtually disappeared
with the only remains left standing on the dockworkers' block
mostly gypsy families who have occupied the abandoned apartments in the building
Gypsies belong to Spain's largest ethnic minority
a minority that is very heavily socially stereotyped and according to various surveys
also the group most harshly rejected by mainstream society
a way to explore the world and understand it
trying to understand them and developing relationships with my subjects over time
I seek an unbreakable but intimate portrait
objectively powerful but full of personal emotion
the product of commitment to people and their environment
trying to represent both their strength and vulnerability
Although El Clot is a slum I have not encountered either rejection or pain
trying to turn this work into an affirmation of the dignity and humanity that is in all people
and trying to capture in pictures the wild vitality and hope of this community
more ambitious objectives: methodically documenting all aspects of gypsy culture
Already a member? Log in
Not a member? Sign up
Explore our Food Tours →
you’ll encounter all the usual suspects of a typical residential Barcelona neighborhood: a small butcher
Bodegas are the social and culinary epicenters of Barcelona – this is especially true for more residential
where eating out at a proper restaurant is a rare event kept for special occasions like birthdays or anniversaries
locals go to their neighborhood bodega for a small copa of nondescript red or white wine and a tapa of boquerones or some simple cold cuts
we immediately felt like we were walking into a friend’s home – if we had a friend that spent all their money on wine
mass-produced bodega wine is replaced with carefully selected boutique natural wine
Brightly lit shelves packed with bottles are the first thing we noticed upon walking in
broad-shouldered man with a warm smile and deep voice coming over to greet us
The man behind Vins Per Tu is Brazil-born William “Willy” Rezende
Willy decided to take up an offer from some friends to visit Barcelona
After two weeks of beach-filled days and party-filled nights he decided not to return to Brazil
leaving a banking career and a very surprised girlfriend behind
Though Willy dreamt of owning his own place
for many years it seemed impossible with Barcelona’s rising rent prices
But the pandemic brought with it new opportunities: rent prices dropped
locals are spending more time in their own neighborhoods.” During the spring of 2020
Willy realized that rather than competing with countless other bars and restaurants in the city center
which are highly reliant on tourism to survive
he could create a new gastronomic space in his own neighborhood and serve his fellow barrio locals
Vins Per Tu is a vinoteca first and foremost – a space to enjoy a glass of wine and maybe take a couple of bottles home with you
Willy will open a few different bottles every evening to choose from
This means every visit begins with a personal interaction with Willy
who will pick out something for each customer
giving them something new to try,” he explains
It was thanks to a chance encounter that the food offered to accompany the wine is as exciting and unique as it is. “My initial plan was to have classic bodega food – conservas
some cold cuts – keep things simple,” says Willy
an Argentinian chef who offered to revamp the menu
The result is a selection of elevated bodega classics that incorporate fresh
seasonal ingredients and modern presentation
we started with succulent oysters which pay homage to Willy’s Brazilian origins with a cachaça sour foam
followed by crispy pan con tomate made with artisanal coca de cristal bread and an umami-filled matrimonio (“marriage”) of pickled and preserved anchovies
The special of the day was coca de caballa
perfectly moist mackerel on a bed of slowly cooked confit tomatoes
we finished with an another play on Catalonia-meets-Brazil with a dish of tender secreto ibérico –thin
marbled cuts of pork – with a corn cream and pickled onions
Willy is still playing around with the dishes and wines he offers
and learning what his customers like the most
His goal for Vins Per Tu to continue to open up the minds and palettes of his patrons
I’m here to offer sensations and experiences,” he says
art exhibitions and wine tastings – and to continue to challenge what a neighborhood bodega can be
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READ MORELas Palmas Medical Center leads El Paso with innovative blood clot removal techniqueby Drew Pittock
Texas (KFOX14/CBS4) — Las Palmas Medical Center recently became the first hospital in El Paso to remove a blood clot through a new
Las Palmas Medical Center successfully removed a blood clot that was complicated by the presence of a venous stent
or mesh tube inserted into weak or narrowed veins that improves blood flow
Stent thrombosis is the medical term for a blood clot that forms near a venous stent and it can lead to various issues
blood clots can form in people of all ages and for myriad reasons such as immobility during a long car or plane ride
trauma to the extremities that cause inflammation in the veins or genetics
RECOMMENDED:Menstrual cycle reshapes women's brains, El Paso expert explains
Shami simply wants his patients to "keep walking."
the mechanical thrombectomy device operates like a brillo pad that scrubs the stent clean before it can be sucked out with a catheter
an alternative treatment option for venous stent thrombosis involved the use of blood thinners
they're not an ideal treatment for all patients for a variety of reasons from socioeconomic status to physical traits
The Las Palmas Medical Center limb preservation program has been working to improve overall limb health and quality
Las Palmas Medical Center is now able to offer intervention to address chronic clots
Sign up to receive the top interesting stories from in and around our community once daily in your inbox
you are at risk for developing blood clots
1 in 5 blood clots are due to cancer and some of its treatments
One important step to take is to understand your risk for dangerous blood clots
because cancer and some of its treatments can increase your risk for blood clots
Talk with your healthcare team about your risk for blood clots
Make sure your cancer doctor and healthcare team know about your personal and family history of blood clots
It is most important that you recognize the symptoms of blood clots and contact your cancer doctor if you experience any of them
Work with your healthcare team and make a blood clot prevention plan specific to your medical history and treatment
A plan to prevent blood clots can help protect the most important thing – your health – during cancer treatment
Blood clots are a leading cause of death among people with cancer
Early diagnosis and treatment can reduce complications of blood clots
The risk of a dangerous blood clot is greatest in the first few months after cancer is diagnosed
survival rates are lower for people who also have blood clots
Click on the image to view and share an infographic about the risk for blood clots connected to cancer and its treatment
Recognize the Signs and Symptoms of Blood Clots
Signs and symptoms of a blood clot in a person’s leg or arm (also called a DVT) may include the following:
Signs and symptoms of a blood clot in a person’s lung (also called a PE) may include the following:
Chest pain that worsens with a deep breath or cough
it is important to understand your risk for blood clots
Click on the image below to view and download a list of risk factors that can help you and your cancer doctor determine your blood clot risk
Talk to your healthcare team and make a plan to prevent blood clots
and risk factors for blood clots and discuss these risks with your cancer doctor
When you are at home recovering from surgery
or if you are receiving treatment in an outpatient clinic
stay alert for any signs or symptoms of blood clots
Contact your cancer doctor right away if you experience any blood clot symptoms
Work with your healthcare team to make a prevention plan
The National Blood Clot Alliance and the Centers for Disease Control and Prevention are working on this important public health campaign to get the word out about blood clot risks and the signs and symptoms of blood clots
You can be an important part of this education campaign by helping us
View and download
View and download
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Metrics details
Despite recent advances in the development of computational methods of modeling thrombosis
relatively little effort has been made in developing methods of modeling blood clot embolization
Such a model would provide substantially greater understanding of the mechanics of embolization
as in-vitro and in-vivo characterization of embolization is difficult
a method of computationally simulating embolization is developed
Experiments are performed of blood clots formed in a polycarbonate tube
where phosphate-buffered saline is run through the tube at increasing flow rates until the clot embolizes
The experiments revealed embolization can be initiated by leading edge and trailing edge detachment or by non-uniform detachment
Stress-relaxation experiments are also performed to establish values of constitutive parameters for subsequent simulations
The embolization in the tube is reproduced in silico using a multiphase volume-of-fluid approach
By varying the constitutive parameters at the wall
embolization can be reproduced in-silico at varying flow rates
and a range of constitutive parameters fitting the experiments is reported
the leading edge embolization is simulated at flow rates consistent with the experiments demonstrating excellent agreement in this specific behavior
A physics-based model informed by in vitro embolization data would allow for a much greater understanding of the mechanics of blood clot embolization
including adhesive forces anchoring a clot
and the internal stretching the clot undergoes
and matched with in vitro embolization experiments
where clots are embolized by the flow of phosphate-buffered saline (PBS) in a plain tube
This computational model uses a volume-of-fluid approach
solving separate constitutive equations for the clot and the PBS on the same computational grid
Experiments were conducted on clots formed from freshly drawn bovine blood with approval from the Pennsylvania State University’s Institutional Animal Care and Use Committee and the appropriate procedures were in accordance with the relevant guidelines and regulations
Methods are reported in accordance with ARRIVE guidelines for the reporting of animal experiments
Blood was drawn from healthy adult female cattle (Bos taurus) into 450-mL bags containing 63 mL of citrate–phosphate-dextrose-adenine (CPDA-1) anticoagulant
The blood was centrifuged at 400g for 15 min
and the platelet-rich plasma (PRP) was separated from the red blood cells (RBCs)
The RBCs were then centrifuged a second time at 1900g for 20 min
and the resultant platelet-poor plasma (PPP) was removed from the RBCs
The platelet concentration in the PRP was measured using a hemocytometer
and the PRP was diluted with PPP to achieve a plasma platelet concentration of 214,000 per microliter
Whole blood was then reconstituted to a hematocrit of 40% by mixing two parts RBCs to three parts reconstituted plasma
0.5 M CaCl2 was mixed with the blood to achieve a calcium concentration of 19 mM to counteract the effect of the anticoagulant
To find constitutive parameters for the embolization model
clots were formed in well plates with a diameter of 15 mm
clots were allowed to form at 37 °C for 1 h
The clots were then loaded into a mechanical tester (Instron—Norwood
The height and radius of the clots were measured
and they were subsequently loaded in compression at a rate of 10% per second for 1 s
and then a 10% compressive strain was maintained for 30 s
giving stress relaxation curves that are used to fit constitutive parameters in subsequent CFD simulations
160 µL of blood was placed carefully in the center of a straight polycarbonate connector (Qosina-Ronkonkoma
USA) with an inner diameter (D) of 12.7 mm
Blood was pipetted into the connector through the Luer lock port
the ends were covered to prevent the clot from drying out
and the blood was left to clot for 1 h at 37 °C
Although flow conditions significantly impact clot composition
whole-blood clots were used to better control their composition and mechanical properties
Blood clot formed in polycarbonate tube with flow probe screen in the background
A total of 32 embolization events were recorded with blood from a total of seven animals
Samples from all animals were treated identically and there was no control group
The 32 events were accepted as they provided sufficient data to report statistics of embolization
Samples were excluded from the experiment in clots that failed to form
no randomization or blinding was performed
To further evaluate the shape of the formed blood clots
seven clots were scanned using Micro-CT (computed tomography) imaging at Penn State’s Huck Institute for Life Sciences
scanning was performed within 8 h of the clots forming
This was performed to observe the shapes of the clots to ensure that an idealized shape used in the simulation was not substantially different from the real clots
The micro-CT images of the clots were not used in the simulations
Region 1 had a length of 12.7 cm (10D) and consisted of 469,800 finite-volume elements
Computational regions 1 and 2. Region 1 provided a fully-developed pipe flow inlet boundary condition to region 2, which interpolated the velocity solution from the outlet of region 1 and every time point.
Computational meshes used in regions 1 and 2
Region 1 used grid stretching to achieve a small y + near the wall
while region 2 used more regularly shaped elements to improve solution stability for the viscoelastic equations
Detailed information on the implemented model and details specific to the simulation are provided in Supplementary Materials 3
To capture the entire range of flow rates observed to produce embolization
PBS was modeled with a kinematic viscosity of 1 × 10–6 m2/s
consistent with that of PBS at 20° Celsius
The flow rates corresponded to Reynolds numbers of 3175
based on the kinematic viscosity of the PBS
These flow rates also corresponded to wall shear rates of 1200
Region 1 used a periodic inlet velocity boundary condition with an enforced average velocity
the velocity field prescribed at the inlet at each timestep was equal to the velocity field at the outlet allowing the velocity field to develop over long time scales and become fully developed
The velocity field at the inlet of region 2 was interpolated from the outlet of region 1
This allowed for a fully developed turbulent pipe flow to approach the clot while meeting the grid requirements of the two regions
The outlets of both regions 1 and 2 used constant pressure boundary conditions
These precursor simulations were performed with the goal of preventing non-physical startup transients from impacting the clot and giving a physically realistic initial velocity field for embolization simulations
no modeling was performed of the clot; the clot region had an enforced zero velocity
replicating a non-moving solid obstruction in the flow
The clot region was modeled as the intersection of the computational domain with a spanwise-oriented cylinder
To speed up the development of turbulent motions
the initial conditions in the velocity field for the precursor simulations had structured noise which was allowed to develop in time
To allow startup transients to pass and for turbulence to develop
simulations were performed for 100 characteristic timescales at each flow rate (T = D/U
where T is the characteristic timescale and U is the mean velocity at the inlet)
Temporal averaging of the velocity and pressure fields was then performed for an additional 200 characteristic timescales
a Courant number of less than 0.5 was enforced throughout the domain
This process of running a precursor simulation provided a physically realistic initial condition for the embolization simulations and allowed for the characterization of the forces acting on the clot
an interface Courant number of 0.01 was enforced
replicating the breakage of a subgrid fiber network (a fibrin mesh or adhered platelets in the case of a blood clot)
different values of \({\varepsilon }_{w}\) were simulated to find bounds for the threshold wall extensibility parameter where embolization occurs
and the total force exerted by the clot onto the bottom wall was recorded by integration of the pressure plus the normal component of the traction vector at every timepoint during simulation runtime
To assess the impact of grid resolution on embolization and other simulation outputs
the 1.9 LPM case was simulated with a grid spacing in region 2 that was decreased by a factor of 1.5
resulting in 8,748,000 finite-volume elements
Embolization was simulated using wall extensibility parameters determined by the lower-resolution grid to ensure that the true threshold value stayed within the same bounds
grid resolution characterization was not repeated at higher flow rates
the mean flow rate at embolization was 5.1 LPM
and the standard deviation of flow rate at embolization was 1.1 LPM
Embolization occurred at flow rates ranging from 2.3 to 7.5 LPM
The average length of clots after formation was 14.2 mm with a standard deviation of 1.7 mm
Left—an embolization event that has left the tube nearly clear of clotted material
Some blood remains in the Luer lock through which the blood was deposited when forming the clots
Right—one large remnant is left after the majority of the clot embolized
Comparison between experimental and numerical stress-relaxation curves used to fit constitutive parameters in PTT model
The top row shows a top-down view of the clots
Below each top-down view is a front-on view of the same clot
showing its cross section in the direction of flow
Results from the precursor turbulent simulations are presented
where overbars indicate a time-averaged quantity
primes indicate fluctuations from the time-averaged quantity
and plus superscripts indicate typical normalization by wall quantities for turbulent boundary layers
Characteristics of the turbulent pipe flow in region 1; (a) mean velocity normalized by friction velocity vs
Solid black line indicates typical log-law profile
while dashed black line indicates typical linear viscous-sublayer profile; (b) streamwise-wall-normal component of Reynolds stress normalized by the square of the friction velocity
Black line indicates linearly decreasing Reynolds stress
\(\rho\) = 1000 kg/m3 is the density of the PBS
and A = 0.181 cm2 is the clot’s area projected in the streamwise direction
Threshold wall extensibility parameter as a function of flow rate
Dashed lines indicate upper and lower bounds of the threshold value
and the black line indicates the geometric mean of the upper and lower bounds
A full example of clot embolization is included in Supplemental Materials 2
where embolization is depicted at a flow rate of 4.2 LPM and a wall extensibility parameter of 5
Early fiber strain concentrations at a flow rate of 4.2 LPM and \({\varepsilon }_{w}=5\) during an embolization event show that fiber strain is concentrated at the leading edge of the clot.
Clots at all flow rates with their lower-bound wall extensibility parameter
fiber strain is still concentrated at the leading edge
Consistent with the lower-resolution simulations
the clot in the higher-resolution simulations embolized at a wall extensibility parameter of 15
and failed to embolize at a wall extensibility parameter of 12
The drag on the clot was found to be 2.84 mN
4.4% higher than for the lower-resolution simulations
This difference is acceptable as sufficiently small as it is under 5%
The approximate scaling of the stress breakage argument remains at a constant order of magnitude across flow rates
The experimental flow rates required to embolize the clots in the plain-tube experiments are interpolated onto the simulation data to obtain embolization drag forces and geometric mean threshold wall extensibility parameter data for each experimental embolization
Using this approach gives a mean wall extensibility parameter of 2.92 with a standard deviation of 2.09
Interpolated threshold wall extensibility parameters ranged between 1.51 and 11.01
The embolization drag force had a mean value of 2.28 mN and a standard deviation of 0.93 mN
The embolization drag force ranged between 0.42 mN and 4.89 mN
there is simply no significant strain concentration at the trailing edge of the in silico clots
The flow at the trailing edge of the clot is possibly not well enough resolved in the simulations
which might explain the low strain in that region
Validation of the fluid flow would help to clarify this discrepancy
An additional possibility is that this discrepancy comes from the assumption in the simulations that the adhesion is uniform throughout the clot
it is possible that the in vitro clots had spatially varying adhesion characteristics
both from natural variability in in vitro experiments
and due to potential drying of the clot at the clot-polycarbonate-air interface
forming a ring of dried clot around the perimeter
it is possible that embolization dynamics were impacted by the movement of the tube during experiments
Although an ideal controlled experiment would have minimal movement of the tube
this complication does highlight the possibility of vessel dynamics on embolization
The “flag-waving” behavior observed experimentally is an especially interesting dynamic
potentially providing a good validation metric for future refinements in embolization modeling
The lifting of the trailing edge of the clot suggests that there may be chaotic
recirculating flows that play a role in clot detachment
The disagreement on leading-edge vs trailing-edge separation suggests that the mechanics of embolization are not being fully captured
One possible explanation for this discrepancy is that there is insufficient spatial resolution in the in silico embolizations
The trailing-edge separation and flag-waving behavior suggest that there may be a recirculating eddy downstream of the clot
potentially due to the smoothing of the interface between the Newtonian and viscoelastic phases that is necessary to avoid numerical instability
Another potential complication is the pulsatile nature of the peristaltic pump used to drive flow in the experiments leading to the possibility that the slight cyclic nature of the loading on the in vitro clots had some impact on the embolization dynamics
Numerical issues were a particular challenge in developing the embolization model and precluded some attempts at a more careful analysis
the requirement for low aspect ratio grid elements combined with the high computational cost of the simulations required near-wall grid elements that only coarsely resolved the viscous boundary layer
Attempts at using local or automated grid refinement similarly met with numerical issues
in particular when the clot interface approached the grid refinement interface
maintaining the low interface Courant number became costly during the process of embolization
so that the large majority of simulated clots were not allowed to fully embolize
restricting the ability to more fully analyze the mechanics of embolization
Future development of a more numerically stable solution algorithm would be desirable
it should be expected that adhesion characteristics of blood clots will change depending on the material they are adhered to
The adhesion characteristics of clots to polycarbonate does not necessarily give much information on adhesion characteristics of commonly used biomaterials though this still provides a good foundation to study other biomaterials
the use of reconstituted whole blood in the current experiments guarantees that the platelet concentration in the clots is nearly physiological for circulating blood
Applying the current model to an in vivo situation would require a much better understanding of the role of different flow conditions on clot formation and likely heterogenous mechanical property distribution
The experiments and model described here provide a set of conditions and methods to interrogate in vivo conditions in the future
A novel modeling approach is introduced for in silico analysis of clot embolization
This approach includes multiphase modeling of a Newtonian fluid and a viscoelastic blood clot
where the constitutive properties of the viscoelastic blood clot are fitted to an in vitro stress–relaxation curve
Adhesion of the clot to the solid surface was modeled by a locally varying extensibility parameter to force the clot to break more aggressively at the wall than in its volume
By varying the flow rate and wall extensibility parameter
the functional dependence of threshold wall extensibility parameter leading to embolization on flow rate was found
These simulations were compared to in vitro embolization experiments in a geometrically similar setup
Experimental embolization occurred at a mean flow rate of 5.1 LPM
By interpolating these results onto CFD outputs
it was found that the drag force required to embolize the clot ranged between 0.42 and 4.89 mN
and the wall extensibility parameter ranged between 1.51 and 11.01
suggesting a wide variability of adhesion characteristics in the in vitro experiments
In silico embolization was found to occur exclusively by separation of the leading edge from the wall
while in vitro embolization was found to more frequently occur by separation of the trailing edge
suggesting some discrepancy between in silico and in vitro stress distribution and embolization behavior and the need for further model development
Data will be made available by the corresponding author (K.B
A mathematical model and numerical method for studying platelet adhesion and aggregation during blood clotting
Computational model of device-induced thrombosis and thromboembolism
Computational simulation of platelet deposition and activation: I
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Development of a computational model for macroscopic predictions of device-induced thrombosis
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Toward modeling thrombosis and thromboembolism in laminar and turbulent flow regimes
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A model for the formation and lysis of blood clots
Computational simulations of thrombolysis in acute stroke: Effect of clot size and location on recanalisation
Modelling combined intravenous thrombolysis and mechanical thrombectomy in acute ischaemic stroke: understanding the relationship between stent retriever configuration and clot lysis mechanisms
Hydrodynamics in acute ischemic stroke catheters under static and cyclic aspiration conditions
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Computational aerodynamics development and outlook
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Computational fluid dynamics simulation of the melting process in the fused filament fabrication additive manufacturing technique
Impact of fibrinogen concentration in severely ill patients on mechanical properties of whole blood clots
Time-dependent hardening of blood clots quantitatively measured in vivo with shear-wave ultrasound imaging in a rabbit model of venous thrombosis
The influence of blood composition and loading frequency on the behavior of embolus analogs
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The authors would like to acknowledge Jose Monclova and Sara Mueller for performing micro-CT imaging
and prepared the majority of the manuscript
performed the in vitro embolization experiments
performed the in vitro compression test experiments
helped develop the embolization experimental protocol
oversaw the project and was involved in manuscript preparation
received a National Science Foundation Grant No
This work used the Extreme Science and Engineering Discovery Environment (XSEDE)
which is supported by National Science Foundation grant (ACI-1548562)
has a financial interest in Cranial Devices
a company which could potentially benefit from the results of this research
The interest has been reviewed and is being managed by the University in accordance with its individual Conflict of Interest policy
for the purpose of maintaining the objectivity of research at The Pennsylvania State University
have no competing interests or conflicts related to this manuscript
Springer Nature remains neutral with regard to jurisdictional claims in published maps and institutional affiliations
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DOI: https://doi.org/10.1038/s41598-023-41825-8
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Introduction: The histological composition of the clot influences its mechanical properties, affects the efficacy of endovascular treatment (EVT), and could determine the clinical outcome of patients with acute ischemic stroke (AIS). Insights into clot composition may guide therapeutic decision-making prior to EVT and facilitate revascularization therapies.
Conclusions: The absence of HMCA and higher levels of CRP were markers of FPC. In patients with FPC, complete recanalization was most likely to be achieved when a SR was selected as first line of treatment. Mortality was higher in patients within this histologic group.
Volume 12 - 2021 | https://doi.org/10.3389/fneur.2021.631343
Introduction: The histological composition of the clot influences its mechanical properties
affects the efficacy of endovascular treatment (EVT)
and could determine the clinical outcome of patients with acute ischemic stroke (AIS)
Insights into clot composition may guide therapeutic decision-making prior to EVT and facilitate revascularization therapies
Material and Methods: Consecutive patients with AIS recorded in a prospective single-center reperfusion registry from December 2015 to December 2019 and treated with EVT were included
laboratory [including post-procedural C-reactive protein (CRP)]
We aimed to study the relationship between histological composition of the clot with basal neuroimaging
The secondary outcome was to analyze the correlation between clot composition and functional outcome at 3 months assessed by the modified Rankin scale (mRS)
360 AIS patients treated with EVT were included
of whom 189 (53%) fulfilled the inclusion criteria
One hundred (53%) cases of fibrin-predominant clot (FPC) were recorded
Full recanalization in FPC cases was achieved with higher probability when stent retrievers (SR) were selected as the first-line device (68.2%
Patients with FPC had higher levels of CRP (p = 0.02)
lower frequency of the hyperdense middle cerebral artery (HMCA) in baseline imaging (p = 0.039)
The multivariate analysis showed that the absence of HMCA (OR = 0.420; 95% CI 0.197–0.898; p = 0.025) and higher levels of CRP (OR = 1.01; 95% CI 1.003–1.019; p = 0.008) were predictors of FPC
Leukocytes and platelet counts were not associated with clot histology
Conclusions: The absence of HMCA and higher levels of CRP were markers of FPC
complete recanalization was most likely to be achieved when a SR was selected as first line of treatment
Mortality was higher in patients within this histologic group
One of the main reasons for the lack of efficacy of EVT is the scant knowledge of the mechanical properties of the clot (6–8) and its histological composition. Both factors are relevant to attainment of successful reperfusion (9) and could aid in the development of endovascular thrombectomy devices
Based on the predominant cell type, clots are usually divided into red clots (RPC), white or fibrin-rich clots (FPC), and mixed clots (MC) (10). In addition, the distribution of the fibrin network (6) and platelet clumps can be highly variable (11). Therefore, some FPC are more resistant to revascularization than others due to their higher friction coefficient (7, 8, 12)
RPC demonstrate a lower density and are more easily removed as a result
A better understanding of the histological composition of the clot could facilitate better clinical and angiographic outcomes
and recanalization strategies including intravenous thrombolysis and clot retrieval devices
The secondary outcome was to analyze the correlation between clot composition and functional outcome at 3 months as assessed by the modified Rankin scale (mRS)
unicentric study based on a prospective registry of all consecutive AIS patients treated with reperfusion therapies in a tertiary stroke center
between 15 December 2014 and 15 December 2019
All patients included were clinically managed according to our institutional protocols
which are based on current international stroke guidelines
The study was approved by the local Clinical Research Ethics Committee with reference number 2019/03/031
Written informed consent was obtained from all included patients or their relatives permitting entry of their information into our reperfusion registry and subsequent use of the data for scientific purposes
in accordance with the Spanish Personal Data Protection law
Flowchart of the patients included in the study
Information regarding clinical stroke severity was assessed by the NIHSS (National Institute of Health Stroke Scale) on admission and during hospitalization
and coagulation) and in-hospital laboratory tests were performed after EVT [biochemistry including thyroid hormones
and the ratio of neutrophil and lymphocyte numbers was calculated
onset to groin puncture and procedural times (time from groin puncture to the end of the endovascular procedure)
Number of passes and degree of recanalization by TICI (Thrombolysis in Cerebral Infarction) scale were obtained; TICI ≥ 2B was considered as effective recanalization
Prognosis at 3 months was evaluated by mRS considering good prognosis as mRS ≤ 2 and mortality mRS = 6
A basal cranial non-contrast CT was performed before EVT
Data on early ischemia was evaluated on basal CT by ASPECTS
Arterial occlusion was assessed on angio-CT scan and mismatch by CT perfusion
All CT imaging was performed using a Philips Brilliance CT
64-slice (Koninklijke Philips Electronics N.V.
and images were analyzed by a neuroradiologist
At 24 h from the procedure or in the case of neurological deterioration, a control CT was performed to evaluate the presence of established infarct or hemorrhagic transformation. Symptomatic intracranial hemorrhage (PH-2) was defined according to Heidelberg criteria (14) as any intraparenchymal hemorrhage associated with an increase in the NIHSS scale score ≥ 4 points or death
All baseline CTs were reviewed retrospectively on a blind basis by two independent neuroradiologists. The presence or absence of the hyperdense middle cerebral artery (HMCA) sign was classified by consensus based on visual inspection and according to the following criteria: (15) (1) spontaneous visibility of the MCA
(2) attenuation of the MCA greater than in the surrounding parenchyma
the case was discussed until a consensus was reached
and the ratio of healthy to pathological radiodensities was also calculated
The final value was considered as the arithmetic mean of the values obtained by each observer
The endovascular procedures were performed using a single-plane angiography
US) or an Azurion 7 B20/15 biplane model (Koninklijke Philips Electronics N.V.
Netherlands) by one board-certified neurologist and a neuroradiologist
General anesthesia was used systematically
Endovascular procedures were performed adhering to the following general methods:
1) Vascular access by puncture of the right femoral artery using the Seldinger technique
2) Selective catheterization using a Terumo 0.030″ guidewire (Terumo Corporation
Japan) and a Flowgate 8F balloon guide catheter (Stryker Corporation
USA) and confirmed diagnosis of the affected territory
Placement of a guide catheter in the cervical segment of the ICA in anterior circulation stroke
Hyperselective catheterization of the occluded vessel and crossing of the clot with Traxcess 0.014″ microguide (MicroVention Inc
Ireland) or Trevo Pro (Stryker Corporation
In M2 occlusions immediately anterior to the opercular gyrus or M3 occlusions a Trevo XP or Catch mini (Balt
The device is removed after 3–5 min of balloon occlusion
and simultaneous manual aspiration was performed with a 60-cc syringe
Other devices used to a lesser extent were Revive SE (Johnson & Johnson
Removal of the device and simultaneous manual aspiration with a 60-cc
In case the outcome was not satisfactory after two aspirations
combined use of SR and local aspiration is undertaken.After each pass
and aspiration syringe were inspected for the presence of thrombus fragments
The device was gently washed with heparinized saline to remove thrombus fragments
Aspirated material was gently flushed with saline to identify any smaller fragments
5) Control angiographic series in anteroposterior and lateral projections
a subjective estimation was made of the red cell component and the fibrin and platelet component
The quantity of polymorphonuclear cells contained in the clot and their status were also evaluated
and PAS staining allowed the presence or not of bacteria to be determined
as well as characteristics suggesting vascular recanalization
Mixed clot with predominant component of fibrin (80–85% FPC component)
The main outcome was to study the relationship between histological composition of the clot with basal neuroimaging
The secondary outcome was to analyze the correlation between clot composition and functional outcome and mortality at 3 months assessed by the modified Rankin scale (mRS)
A descriptive study of the variables was performed using central and scattering tendency measures for quantitative variables and the exact calculation and percentage for qualitative variables
Normality of the sample was established using the Kolmogorov–Smirnov test
The comparison of the categorical variables between two or more subgroups was performed using the Pearson's chi-squared test or
The comparison between quantitative variables was performed with the Student's t-test
The comparison between medians was performed using the Wilcoxon signed-rank test
The independent effect of the clinical variables was calculated with multivariate binary logistic regression models
considering the presence of an FPC clot (bad outcome) as a dependent variable
The Hosmer–Lemeshow goodness-of-fit test was used to evaluate the global model fit
The variables included in the multivariate analysis
in addition to the time from onset of symptoms
were those with statistical significance p < 0.1 in the bivariate models
The odds ratio (OR) was calculated for each variable
A ROC (receiver operating characteristic) curve was performed to analyze the cutoff point with the best discriminatory value of the quantitative variables
A p < 0.05 was considered significant for all analyses
All the results were analyzed with the statistical software IBM SPSS Statistics® Version 26 (SPSS
In the study period, 360 mechanical thrombectomies were performed (Figure 1)
One hundred eighty-nine (52.5%) fulfilled our inclusion criteria
Reasons for exclusion were vertebrobasilar or multiple-territory occlusion (n = 47)
absence of thrombus for histological analysis (n = 35)
and incomplete clinical follow-up (n = 23)
The mean overall age of the cohort was 69.5 years (range 28–91); one hundred (53%) of the patients were male
The histological distribution of the clots was as follows: FPC: 100 (53%), MC: 46 (24%), and RPC: 43 (23%). Figure 3 shows examples of the histological types analyzed
(A) (HE2×) and (B) (HE20×)
Platelet fibrin-predominant clot (FPC) with moderate number of complete neutrophils
(C) (HE2×) and (D) (HE20×)
(E) (HE20×) and (F) (HE40×)
Mixed clot (MC) with plenty of neutrophils
FPC patients were more frequently under oral anticoagulation (p = 0.042) and had higher levels of CRP (p = 0.02). On the contrary, they received less IV thrombolysis (p = 0.047) compared with the rest of the cohort and had lower frequency of HMCA in baseline CT (p = 0.039). FPC patients had higher rates of mortality (p = 0.012) (Table 1)
and radiological variables in patients with fibrin-predominant clot (FPC) vs
Seventy-three (39%) of the patients received IV thrombolysis bridging EVT. Thirty-two (44%) had FPC. In a bivariate analysis (Table 2)
patients with FPC treated with IV thrombolysis obtained higher rates of complete recanalization compared to the rest of the patients (p = 0.005)
Bivariate analysis: patients treated with intravenous (IV) alteplase previous endovascular treatment (EVT)
Distribution of first-line devices in patients with fibrin-predominant clot (FPC)
In a multivariate analysis the absence of HMCA (OR = 0.420; 95% CI 0.197–0.898; p = 0.025) and higher levels of CRP after EVT (OR = 1.01; 95% CI 1.003–1.019; p = 0.008) were predictors of FPC (Table 4)
Multivariate analysis: predictors of the fibrin-predominant clot (FPC) in all cohorts
The ROC curve did not disclose any significant association between levels of CRP after the EVT and the histological composition of the clots (area under the curve 0.6
In bivariate analysis, higher baseline NIHSS and lower ASPECTS on admission were related to poor functional outcome. Higher levels of baseline glucose and CRP, tandem occlusion, TICI 2B recanalization, and PH-2 were also associated with mRS > 2, as shown in Table 5
Functional independence at 3 months and mortality
Patients with TICI 2B recanalization, PH-2, and FPC (p = 0.021) had higher rates of mortality at 3 months (Table 5)
The absolute number of neutrophils, lymphocytes, and their ratio (neutrophils/lymphocytes) were significantly associated with prognosis at 3 months, while a significant relationship was detected between the absolute number of lymphocytes and mortality (Table 5). None of the cell series analyzed were significantly related to the predominant histological composition (Table 1)
Our series provided a substantial amount of histopathological data about heterogeneous clot samples
which allowed us to perform several comparisons between histological subtypes of the thrombus with clinical
and radiological variables and recanalization strategies
Our main finding was the association between patients with FPC and absence of HMCA in their baseline CT scan. In line with our results, a systematic review grouping neuroimaging studies by histological characteristics demonstrated that patients with signs of HCMA on the baseline CT were more likely to have RPC (OR 9.0, 95% CI 2.6–31.2, p < 0.01) (17)
higher neutrophil counts and relative neutrophilia on admission were associated with bad functional outcome
while relative lymphocytosis corresponded with higher mortality
To evaluate the effect of IV thrombolysis, we performed a subanalysis in patients with FPC and we found that these patients had higher complete recanalization rates. These data suggest a synergistic effect of the IV thrombolysis bridging EVT in patients with FPC and reinforce the indication of current guidelines giving IV thrombolysis if no contraindication exists (23)
FPC patients had higher mortality rates compared to the rest of the cohort; these patients were more frequently under oral anticoagulation and received less intravenous thrombolysis as expected
patients with FPC achieved full recanalization (TICI 3) with higher probability when SR were selected as first-line treatment
There are limited studies that have taken into consideration thrombus composition when comparatively analyzing the efficacy of the main recanalization strategies (stent retrieval or aspiration). In particular, the higher coefficient of friction of FPC may increase their resistance to direct suction and may require a higher number of contact points for complete extraction. In line with our results, an experimental study comparing direct aspiration to SR (24)
white clots were retrieved by the SR and balloon guide catheter with fewer distal emboli
The study of the histopathological and mechanical properties of the clot should be part of the strategy for the development of new EVT endovascular devices. Behavior of clots is currently analyzed using experimental models in vitro (8, 25), thus trying to obtain better recanalization rates (12)
the potential to establish predictors of the histological composition of the clots could optimize the selection of reperfusion strategies
as well as extend the use of endovascular devices with a higher efficacy in case of resistant clots
The fibrin structure present in a clot is a critical element that modifies its mechanical behavior, as it gives it properties of hardness (26), impenetrability (7), and friction, which involve greater technical difficulty (12), lower vascular recanalization rates, and treatment delay (18, 27)
Despite this evidence, uncertainty persists regarding the relationship between clot composition, angiographic outcome, and stroke etiology (17)
so the practical value of obtaining the histopathological characteristics of the clot in acute stroke remains unclear
we have not been able to establish a direct association between HU determination and the predominant fibrin composition
so the results could be affected by various biases
The determination of a cutoff point of 60% to discriminate the predominance of a histologic subtype by a semiquantitative method makes it difficult to neatly identify subgroups and may alter the analysis
Although we have used several observers to minimize variability in the analysis of images
precision could have been greater if we had recorded the kappa coefficient
CRP was measured only in 78% of the patients and once the EVT was completed
so it cannot be categorized as a baseline biomarker
The ultrasensitive CRP systematic analysis before reperfusion treatment might contribute toward the elucidation of this
We have only included patients with single anterior circulation occlusion and with high recanalization rates
so the sample may have been excessively selected
losing sensitivity in some of the known prognostic variables (as first-pass effect)
The higher percentage of anticoagulated patients existing in the FPC group could condition the administration of IV thrombolysis
The absence of HMCA on baseline CT and CRP levels appear to be a reliable marker of FPC
which could allow an individualized treatment approach such as prior administration of intravenous thrombolysis and the use of specific thrombectomy devices
the choice of a SR as first-line treatment in FPC cases was more effective in achieving complete recanalization than aspiration devices
Histopathological study and identification of treatment-refractory clots improve patient characterization and could guide therapeutic strategies for recanalization
The raw data supporting the conclusions of this article will be made available by the authors
The studies involving human participants were reviewed and approved by CEIm of University Hospital of Albacete
The patients/participants provided their written informed consent to participate in this study
MER-A drafted the manuscript and performed the statistical analysis
RB-A performed the histopathological analysis and drafted the manuscript
All authors contributed to the article and approved the submitted version
MER-A was funded by Instituto de Salud Carlos III
The authors declare that the research was conducted in the absence of any commercial or financial relationships that could be construed as a potential conflict of interest
We want to thank our patients and their families
Javaad Ahmad for the revision of the English grammar
We acknowledge the work of the other members of the Neurology
and Anesthesiology Services of the University Hospital of Albacete for the clinical management of these patients
Guidelines for the early management of patients with acute ischemic stroke: 2019 update to the 2018 guidelines for the early management of acute ischemic stroke: a guideline for healthcare professionals from the American Heart Association/American Stroke Association
Modified thrombolysis in cerebral infarction 2C/thrombolysis in cerebral infarction 3 reperfusion should be the aim of mechanical thrombectomy: insights from the ASTER trial (contact aspiration versus stent retriever for successful revascularization)
First pass effect: a new measure for stroke thrombectomy devices
True first-pass effect: first-pass complete reperfusion improves clinical outcome in thrombectomy stroke patients
When to stop: detrimental effect of device passes in acute ischemic stroke secondary to large vessel occlusion
Thrombus permeability in admission computed tomographic imaging indicates stroke pathogenesis based on thrombus histology
Clot permeability and histopathology: is a clot's perviousness on CT imaging correlated with its histologic composition
ANCD thrombectomy device: in vitro evaluation
Histopathologic analysis of retrieved thrombi associated with successful reperfusion after acute stroke thrombectomy
CT and MRI early vessel signs reflect clot composition in acute stroke
Histopathologic composition of cerebral thrombi of acute stroke patients is correlated with stroke subtype and thrombus attenuation
Per-pass analysis of thrombus composition in patients with acute ischemic stroke undergoing mechanical thrombectomy
Classification of subtype of acute ischemic stroke
Definitions for use in a multicenter clinical trial
Trial of Org 10172 in Acute Stroke Treatment
The Heidelberg Bleeding Classification: Classification of bleeding events after ischemic stroke and reperfusion therapy
Prevalence and significance of hyperdense middle cerebral artery in acute stroke
Orbit image analysis machine learning software can be used for the histological quantification of acute ischemic stroke blood clots
Correlation of imaging and histopathology of thrombi in acute ischemic stroke with etiology and outcome: a systematic review
The impact of histological clot composition in embolic stroke
Thrombin induced platelet-fibrin clot strength in relation to platelet volume indices and inflammatory markers in patients with coronary artery disease
Prothrombotic fibrin clot properties are associated with post-discharge venous thromboembolism in acutely ill medical patients
Fibrin clot properties independently predict adverse clinical outcome following acute coronary syndrome: a PLATO substudy
and reperfusion in ischemic stroke patients treated with mechanical thrombectomy
European Stroke Organisation (ESO) – European Society for Minimally Invasive Neurological Therapy (ESMINT) guidelines on mechanical thrombectomy in acute ischaemic Stroke Endorsed by Stroke Alliance for Europe (SAFE)
Influence of thrombus composition on thrombectomy: ADAPT vs
balloon guide catheter and stent retriever in a flow model
What to do about fibrin rich “tough clots”
Comparing the Solitaire stent retriever with a novel geometric clot extractor in an in vitro stroke model
Mechanical behavior of in vitro blood clots and the implications for acute ischemic stroke treatment
The impact of thromboemboli histology on the performance of a mechanical thrombectomy device
Proximal hyperdense middle cerebral artery sign predicts poor response to thrombolysis
Permeable thrombi are associated with higher intravenous recombinant tissue-type plasminogen activator treatment success in patients with acute ischemic stroke
Histologic analysis of retrieved clots in acute ischemic stroke: correlation with stroke etiology and gradient-echo MRI
Citation: Hernández-Fernández F
Julia-Molla E and Segura T (2021) Fibrin-Platelet Clots in Acute Ischemic Stroke
Predictors and Clinical Significance in a Mechanical Thrombectomy Series
Received: 19 November 2020; Accepted: 09 March 2021; Published: 20 April 2021
Copyright © 2021 Hernández-Fernández, Ramos-Araque, Barbella-Aponte, Molina-Nuevo, García-García, Ayo-Martin, Pedrosa-Jiménez, López-Martinez, Serrano-Heras, Julia-Molla and Segura. This is an open-access article distributed under the terms of the Creative Commons Attribution License (CC BY)
distribution or reproduction in other forums is permitted
provided the original author(s) and the copyright owner(s) are credited and that the original publication in this journal is cited
in accordance with accepted academic practice
distribution or reproduction is permitted which does not comply with these terms
*Correspondence: María E. Ramos-Araque, cmFtb3NtYXJ5ZXN0aGVyQGdtYWlsLmNvbQ==
†These authors have contributed equally to this work
Disclaimer: All claims expressed in this article are solely those of the authors and do not necessarily represent those of their affiliated organizations
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Jorge López Muñoz is a Spanish photographer based in Valencia. In 2016 he was shortlisted in the first ever ZEISS Photography Award 'Seeing Beyond' with his series 'El Clot'
He has made solo exhibitions in CENTRO CULTURAL DE NOAIN (Navarra
NANO Festival de Fotografía (FOLA Fototeca Latinoamericana
Poland) and BARBASTRO FOTO Festival (Sala El Moliné
He has also made a Public Art Exhibition with JR's Insideoutproject in Valencia
PDN and Emerging Photographer Magazine (USA)
PRISM Contemporary Photography Journal (Ireland)
Magazine de La Vanguardia and RobbReport (Spain)
We caught up with him a year on from his ZEISS success:
This is an artistic documentary and portrait photography project
'El Clot' neighbourhood is located in El Cabanyal
For the last 20 years the building and nearby homes have been threatened by demolition in order to extend an avenue to the seafront
'El Clot' inhabitants are mostly gypsy families who have occupied the abandoned apartments in the block
a minority that is very heavily socially stereotyped and
Although 'El Clot' is a slum I have not encountered either rejection or pain
When and why did you first come to photography
I decided to study photography and became professional in 2012
I earned my photography degree at the Art and Design College of Valencia (EASD) in 2015
Then I won a full-ride grant at LENS School of Visual Arts of Madrid
When I started with the project I didn't know anything about the gypsies or 'El Clot' neighbourhood
You've won many awards; how important have competitions been to your career
I realized that most people to whom I showed the project liked it and indeed encouraged me to apply for competitions
But the reason why they have been important to me is because they allowed me to exhibit my photographs around the world: they afford me a platform to make my work known internationally
And – increasingly – I have received professional commissions because of that
Being able to show 'El Clot' at Somerset House in London thanks to the Zeiss Competition was a blast
My work is my way to explore the world and understand it
I am interested in the individual and their architectural environment
with real people and their real situations as a photographic object
I wanted to try to understand their way of life and to capture in pictures the wild vitality and hope of this community
intimate portrait - direct but sensitive - of these people in their habitat
and in doing so show their vulnerability and strength
Everything starts with the fascination for the other
This project shows my attraction towards them
First from a place of curiosity and them from obsession
It is a subject that I became passionate about since second one
Mine with this project was to methodically document all aspects of gypsy culture
its people and its territory; having the project become a broad work about their identity
I do not pretend that my images are direct mirrors of reality
Because the world as such does not exist: it is created at every moment by the unique subjective vision of an artist
Where in the world are you and what's next for you
I am working in a new long-term personal project now
But I still visit them in 'El Clot' and take pictures every now and then
There are more exhibitions of it coming in several countries
I do want to keep working with the gypsy community for future projects
I have recently given a workshop for the first time
It does not cease to amaze me the multiple readings that a project like this has according to the viewer
and I find it very enriching to get to know them first hand
professional commissions are arriving for coverage
jorgelopezmunoz.com
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Barcelona
the first thing you'll see at Bodega Carol are the cheese wheels under glass next to the bar
Carol has a top-notch cheese shop – there's particulary whiffy variety from Huelva
so be advised (you could take that as a tip or a warning
depending on your penchant for smelly cheese)
Turn your head and have a look at the blackboard for highlights of their gastronomic offering: meatballs
and pretty much anything you can imagine made from pork
Their cold cuts and cured meats are made from prime Iberian raw materials
Don't be fooled but what you might describe as a shabby appearance – one of its charms – this bodega has got more spirit and better food than all the posh
And that's not even saying enough.Those behind Bodega Carol are quite clever
They picked up an old tavern with loads of character
instead of going crazy making into something it wasn't
they decided to keep its working-class charm
Just a couple of minutes' walk from the Encants metro station
brick and wood.Wine barrels are converted into tables
and there is a good variety of low-priced wines
Bottles of Estrella Damm beer sell like hotcakes and fill the bar
while the tables on the terrace are full of empties
It attracts a neighbourhood clientele with an age range from 25 to 60
it's a living example of a classic home-grown Barcelona tavern
and it's full of something that's increasingly rare in the city these days: a sense of humour
Count the thousands of keyrings hanging on the walls
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LOS ANGELES (AP) — Los Angeles Lakers forward Brandon Ingram will miss the rest of the season after being diagnosed with a deep venous thrombosis in his right arm
The Lakers announced their decision on the former No
Ingram has missed the Lakers’ past two games after he reported shoulder pain following a morning shootaround last Monday
Lakers coach Luke Walton said earlier this week that Ingram had pain whenever he attempted to lift his arm
A deep venous thrombosis is a condition caused by a blood clot
frequently accompanied by swelling and pain in a limb
Blood clots have affected several prominent athletes including Chris Bosh and Serena Williams in recent years
Bosh eventually retired due to blood clotting issues
but many other athletes have continued to play
Ingram is averaging a career-best 18.3 points and 5.1 rebounds per game along with 3.0 assists
The lanky swingman’s chemistry with LeBron James has improved markedly over the course of the season despite several weeks of trade rumors linking Ingram and the rest of the Lakers’ top young players to a deal for New Orleans superstar Anthony Davis
Ingram particularly excelled after the All-Star break and the trade deadline
averaging 27.8 points in his six most recent games
But injuries have played a major role in preventing the Lakers from developing any consistency during James’ first season alongside their young core
Los Angeles might be without Lonzo Ball for the rest of the season due to a sprained ankle
and Walton said Friday that the point guard is “not close” to returning despite an initial diagnosis of his injury suggesting he would be back by now
the Lakers’ second-leading scorer with 18.8 points per game
also is out this week with a sprained ankle
The Lakers (30-35) are in 10th place in the Western Conference heading into their rivalry meeting with Boston on Saturday night
They trail San Antonio by 6-plus games for the final playoff spot
meaning James likely will miss the postseason for the first time since 2005
Medical experts weigh in on the condition and explore past cases of professional athletes who have suffered from it
Milwaukee's star guard is on blood-thinning medication
Aaron Gordon comes up clutch again for the Nuggets
while the Thunder face the 1st big test of their 2025 playoff run
Boston's reliance on the 3-ball backfires
while New York's defenders come through in the clutch to pull off massive comeback for series-opening win
Celtics announce Porzingis was questionable to return with an illness that they specified was non-Covid
Breanna Stewart and Jonquel Jones glamour up alongside Angel Reese for the annual fashion event
Kenny Atkinson experienced a setback on his coaching journey
it fueled the 2024-25 NBA Coach of the Year
Follow the NBA Playoffs with our Nightly Pulse blog featuring all the latest news
scores and highlights from around the league
The rustic family favorite Can Pineda has been holding down this corner of Barcelona’s El Clot neighborhood since 1904
where plenty of life could be found amongst the wooden barrels that now slumber peacefully on their perch up above the dining room
the place was frequented by local factory workers
who would come for a glass of wine to go with a simple meal or to drink while warming up their lunch boxes
The then-owners would put a pine branch on the door to signal the arrival of the vi novell
which translates roughly to “The Pine House.”
El Clot is part of the new high-tech 22@ district
which is focused on innovation and research but maintains in its oldest streets the spirit of the village (Sant Martí de Provençals) that once flourished here
with its own market (dating back to 1889) and walls that remain from Barcelona’s first Industrial Age
a small but welcoming eatery with just 30 seats
decorated with the characteristic blue azulejos tiles
those wooden barrels and a few excellent hams hanging behind the bar
Partners and brothers-in-law Paco Cuenca (front of the house) and Jaume Jovells (head chef) have run Can Pineda since the 1970s
they have gone from a simple bar to a more ambitious restaurant
turning excellent seasonal and local ingredients into interesting dishes with a Catalan foundation and Spanish
Instead of wine poured straight from those barrels
Can Pineda now offers a selection of 200 to 300 Spanish and international wines
and diners can call on the expertise of the restaurant’s sommelier
There are bottles from some of the most renowned Spanish and Catalan wineries
L’Ermita (Priorat) and Venus L’Universal (Mont Sant)
Locals and visitors from abroad marvel over carefully prepared dishes made with ingredients such as Catalan mushrooms
and fresh fish and seafood from the Mediterranean and Atlantic
The sardine coca (a traditional flatbread) highlights the deeply savory qualities of the fish with caramelized onion
and the crispy coca offers a delightful contrast to the fleshy fish
We also like the homey meatballs (pork and beef)
in a satisfyingly earthy Catalan rendition of surf and turf
Another winter dish combining flavors from land and sea was the stew of artichokes and mongetas del ganxet (Catalan white beans) with a few big
The white truffles that Can Pineda gets from a direct supplier in Italy’s Piedmont region bring their beguiling perfume to a few of the restaurant’s Italo-French dishes
delicate fresh pasta or the pochè eggs with foie
which imbue the dish with a subtle yet thoroughly enticing aroma
We always make sure to save room for dessert – perhaps the praline biscuit with broiled yolk or the Roquefort cheese with pear and pepper
we’ll ask for the house specialty: bombetas
small bites of crispy phyllo that gush forth warm cream or chocolate when bitten into
Can Pineda’s owners have been honing their craft for a long time
while Jovells began working there at the tender age of 11
transforming a simple bar into one of Barcelona’s culinary institutions
This article was originally published on December 9
Can Pineda, Carrer de Sant Joan de Malta 55
The method of mechanical thrombectomy (MT) is related to vascular anatomy and stroke etiology. Meniscus sign and thrombus permeability as imaging markers may be instructive for the selection of MT. This study aims to clarify the relationship among meniscus sign, thrombus permeability, and choice of MT in patients with acute middle cerebral artery occlusion.
A total of 111 patients with acute middle cerebral artery occlusion (MCAO) who underwent MT were retrospectively analyzed. Clot meniscus sign was defined as the appearance of meniscoid/edge-like or single- or double-wall contrast channels besides or around insular blood clots. The radiographic, clinical, and surgical data of patients with MCAO with or without meniscus sign were compared.
Patients with MCAO with positive meniscus sign have higher thrombus permeability and are more suitable for CA to acquire better clinical outcomes.
Volume 13 - 2022 | https://doi.org/10.3389/fneur.2022.850429
Background and Purpose: The method of mechanical thrombectomy (MT) is related to vascular anatomy and stroke etiology
Meniscus sign and thrombus permeability as imaging markers may be instructive for the selection of MT
This study aims to clarify the relationship among meniscus sign
and choice of MT in patients with acute middle cerebral artery occlusion
Materials and Methods: A total of 111 patients with acute middle cerebral artery occlusion (MCAO) who underwent MT were retrospectively analyzed
Clot meniscus sign was defined as the appearance of meniscoid/edge-like or single- or double-wall contrast channels besides or around insular blood clots
and surgical data of patients with MCAO with or without meniscus sign were compared
Results: The meniscus sign positive group (n = 26) has higher thrombus permeability (HUs) (26.92 ± 9.69 vs
Shorter puncture-to-recanalization (P2R) time (65.5 vs
higher complete recanalization rate (85.71 vs
and better clinical outcome (p < 0.01) were obtained by selecting contact aspiration (CA) over stent retriever (SR) in patients with positive meniscus sign
there was no significant difference in clinical outcome after receiving CA or SR
Conclusion: Patients with MCAO with positive meniscus sign have higher thrombus permeability and are more suitable for CA to acquire better clinical outcomes
we aimed to compare the thrombus permeability
CA in patients with acute middle cerebral artery occlusion suggested by the presence of meniscus sign
Ethics approval of this study was obtained from the Medical Ethics Committee of Zhongnan Hospital of Wuhan University
Occlusive clot sign was defined as the angiographic appearance of the occluded site before recanalization, and the meniscus sign is a special type. Clot meniscus sign was defined as an appearance of meniscoid/edge-like or single- or double-wall contrast channels besides or around insular blood clots at the proximal end of the occluded vessel in DSA (7, 8) (Figure 2)
(A,B) Images of a middle cerebral artery occlusion in patients with positive meniscus sign
Measurement of thrombus permeability on non-contrast CT (nCT
Three regions of interest (red circles) are placed in the proximal
and distal parts of the thrombus (red arrow) to calculate the mean Hounsfield unit (HU) density value of the occlusion site
All the patients underwent MT and were divided into different groups according to the first treatment with SR or CA
All endovascular treatments were completed by 2 interventional neuroradiologists with more than 5 years of interventional experience (BM
The first-line thrombectomy method was selected by the interventional neuroradiologists during the operation
The retrievers used in the study included Solitaire FR (Medtronic
A large-bore aspiration catheter (Penumbra System Reperfusion Catheter ACE™ 60; Penumbra
United States) or an intermediate catheter was used in CA
If the first-line method initially selected failed to achieve effective recanalization
another method would be used for rescue treatment
All the patients had completed CT and CTA examinations and signed informed consent before surgery
the quantitative variable was expressed as mean ± standard deviation or median with interquartile range
and the qualitative variable was expressed as counts and frequencies
Pearson χ2 tests or Fisher exact tests were performed for categorical variables
and continuous variables were compared by t-tests or the Mann–Whitney U test
Multivariate logistic regression was used to evaluate the independent variables of complete recanalization in patients with positive meniscus sign
P < 0.05 was considered statistically significant
Statistical analyses were performed using SPSS for Windows (Version 23.0; IBM)
Comparison of data between patients with and without meniscus sign
Boxplots of change in thrombus permeability for different etiological groups in patients (A) with or (B) without meniscus sign
Comparison of surgical data and clinical outcome among patients with meniscus sign in different MT methods
Distribution of mRS score at 90 days among different groups
Comparison of surgical data and clinical outcome among patients without meniscus sign in different MT methods
Multivariate regression analysis for complete recanalization in patients with meniscus sign
This study showed that the presence of meniscus sign was associated with AF
and better prognosis could be obtained performing CA
the relationship with thrombus occlusion morphology has not been further explored
our research further analyzed the relationship between meniscus sign and thrombus permeability
and confirmed a significant correlation between the two
and this may be helpful in determining the subtype of stroke and making decisions on MT methods
but the preoperative mRS score of the CA group was higher
There are several limitations in this study
the choice of first-line MT is completely determined by the surgeon based on clinical experience
this study lacks histopathological data on thrombus and ignores the influence of different types of contrast agents when measuring thrombus permeability
this study is a single-center one with small sample size
and a multi-center and large-sample prospective study should be carried out in the future
those with positive meniscus sign have higher thrombus permeability and are more suitable for CA as the first-line MT method to obtain higher complete recanalization rate and better functional outcomes
The original contributions presented in the study are included in the article/supplementary material
further inquiries can be directed to the corresponding author
The studies involving human participants were reviewed and approved by the Medical Ethics Committee of Zhongnan Hospital of Wuhan University (approval number: 2020198)
Written informed consent was not required for the current study in accordance with the local legislation and institutional requirements
CN and ZK collected the data of the patients
CN analyzed the data and drafted the manuscript
This work was supported by the Translational Medicine and Interdisciplinary Research Joint Fund of Zhongnan Hospital of Wuhan University (No
All claims expressed in this article are solely those of the authors and do not necessarily represent those of their affiliated organizations
Any product that may be evaluated in this article
or claim that may be made by its manufacturer
is not guaranteed or endorsed by the publisher
Endovascular thrombectomy for acute ischemic stroke: a meta-analysis
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Thrombectomy for stroke at 6 to 16 hours with selection by perfusion imaging
Mechanical thrombectomy of acute middle cerebral artery occlusion using trans-anterior communicating artery approach
Clot perviousness is associated with first pass success of aspiration thrombectomy in the COMPASS trial
Significance of angiographic clot meniscus sign in mechanical thrombectomy of basilar artery stroke
Initial angiographic appearance of intracranial vascular occlusions in acute stroke as a predictor of outcome of thrombolysis: initial experience
Baseline occlusion angiographic appearance on mechanical thrombectomy suggests underlying etiology and outcome
Refining angiographic biomarkers of revascularization: improving outcome prediction after intra-arterial therapy
Trial of Org 10172 in acute stroke treatment
permeable thrombi are associated with higher intravenous recombinant tissue-type plasminogen activator treatment success in patients with acute ischemic stroke
Angiographic demarcation of an occlusive lesion may predict recanalization after intra-arterial thrombolysis in patients with acute middle cerebral artery occlusion
The claw sign: an angiographic predictor of recanalization after mechanical thrombectomy for cerebral large vessel occlusion
doi: 10.1016/j.jstrokecerebrovasdis.2019.03.007
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Thrombus histology suggests cardioembolic cause in cryptogenic stroke
Thrombus composition in acute ischemic stroke: a histopathological study of thrombus extracted by endovascular retrieval
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A comparison of direct aspiration versus stent retriever as a first approach ('COMPASS'): protocol
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Clot Meniscus sign: an angiographic clue for choosing between stent retriever and contact aspiration in acute basilar artery occlusion
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Risk of distal embolization with stent retriever thrombectomy and ADAPT
Comparison of aspiration versus stent retriever thrombectomy as the preferred strategy for patients with acute terminal internal carotid artery occlusion: a propensity score matching analysis
Balloon guide catheter improves revascularization and clinical outcomes with the Solitaire device: analysis of the North American Solitaire Acute Stroke Registry
Sun D and Mei B (2022) Clot Meniscus Sign Is Associated With Thrombus Permeability and Choice of Mechanical Thrombectomy Technique in Acute Middle Cerebral Artery Occlusion
Received: 07 January 2022; Accepted: 24 January 2022; Published: 24 February 2022
Copyright © 2022 Nie, Kang, Tu, Wu, Sun and Mei. This is an open-access article distributed under the terms of the Creative Commons Attribution License (CC BY)
*Correspondence: Bin Mei, bmV1cm9tZWkyMEAxNjMuY29t
Metrics details
Neutrophils and neutrophil extracellular traps (NETs) have been shown to be involved in coagulation
the interactions between neutrophils or NETs and fibrin(ogen) in clots
and the mechanisms behind these interactions are not yet fully understood
the role of neutrophils or NETs on clot structure
formation and dissolution was studied with a combination of confocal microscopy
FXI and FVII-deficient plasmas were used to investigate which factors may be involved in the procoagulant effects
We found both neutrophils and NETs promote clotting in plasma without the addition of other coagulation triggers
indicating that other factors mediate the interaction
The procoagulant effects of neutrophils and NETs were also observed in FXII- and FVII-deficient plasma
only the procoagulant effects of NETs were observed
while neutrophils-induced clots were less stable and more porous
NETs accelerate clotting and contribute to the formation of a denser
may induce clotting in a different manner to NETs
questions remain whether neutrophils contribute to coagulation independently or via NETs
whether both neutrophils and NETs promote clotting via the intrinsic pathway and how procoagulant factors interact with neutrophils or NETs
This in vitro study aims to investigate the role of neutrophils and NETs in blood coagulation
to decipher how neutrophils or NETs interact with the fibrin network
The role of neutrophils or NETs on clot formation and clot dissolution was analysed by turbidity and lysis assays
clot structure was determined by confocal microscopy
and clot stability and pore size were investigated using permeation studies
We found that both partially activated neutrophils and NETs promote clotting in plasma independently of additional triggers
We also found that the procoagulant effects of NETs are independent of FXI
the procoagulant effects of neutrophils are mediated via FXI
Expression of neutrophil-surface antigens on isolated human neutrophils and differentiated PLB-985 cells and the capacity of NETosis of these cells
The expression of antigens on cells was detected in living cells via flow cytometry
(a) Expression levels of CD16 and CD66b on human neutrophils were used as the positive control
Expression levels of (b) CD16 and (c) CD66b on differentiated PLB-985 cells were detected on the day 6 of treatment with 1.25% DMSO
untreated cells were used as the negative control
(d) Expression level of CD11b on differentiated PLB-985 cells was detected on the day 3 and day 6 of treatment with 1.25% DMSO
untreated PLB-985 cells were used as a negative control
and human neutrophils were used as a positive control
Error bars represent SD of three technical replicates
(e) Unstimulated human neutrophils using fluorescence microscopy
(f) NETs generated from isolated human neutrophils stimluated with PMA
(g) NETs generated from differentiated PLB-985 cells stimulated with PMA
Green (cyan in overlay with blue): Alexa Fluor 488 labelled Histone H3 (citrulline R2 + R8 + R17)
Effects of neutrophils and NETs on coagulation
Turbidity measurements were carried out in (a) a purified fibrinogen system or in (b) NPP
Differentiated PLB-985 cells or human neutrophils (200,000 cells/100 µl) or NETs (generated from 200,000 cells/100 µl) were added to purified fibrinogen or plasma
Normalized percentage of MaxOD (compared to thrombin only controls) was quantified
plasma (diluted 1:6) and CaCl2 (1.5 mM in purified fibrinogen or 3.33 mM in plasma)
Error bars represent SD of three technical replicates in triplicates
Effects of human neutrophil supernatant on clot formation
showing the effects of human neutrophils (200,000 cells/100 µl) and their supernatant on clot formation when added to NPP
(c) MaxOD and (d) maximum rate of clot formation (turbidity Vmax) were quantified
Other concentrations: plasma (diluted 1:6) and CaCl2 (3.33 mM)
Lysis analysis of the effect of human neutrophils or human NETs on clot dissolution
Neutrophils (200,000 cells/100 µl) or NETs (generated from 200,000 cells/100 µl) were added to plasma
(a) Average rate of lysis and (b) time from MaxOD to 50% lysis were quantified
Other concentrations: plasma (diluted 1:6)
Error bars represent ± SD of three technical replicates in triplicates
To investigate through which pathway neutrophils/NETs promote clotting, tissue factor (TF) and FXII Inhibitors (TF antibody and Corn trypsin inhibitor (CTI)) were used to block TF and FXII in turbidity. Nevertheless, we saw no effect of these inhibitors in plasma-based experiments (Supplementary Fig. S4 online)
FXI- and FVII-deficient plasmas were used in turbidity to investigate the procoagulant effects of human neutrophils and NETs
Turbidity analysis of the effect of human neutrophils and human NETs on FXII
(a) Human neutrophils (200,000 cells/100 µl) or (b) human NETs (generated from 200,000 cells/100 µl) were added into FXII
(c) Normalized percentage of MaxOD and (d) normalized percentage of time to MaxOD were quantified
Other concentrations: plasmas (diluted 1:6) and CaCl2 (3.33 mM)
deficient plasma data represents 4–6 replicates
Clot density and the permeability of clots with human neutrophils or human NETs
(a) The overall structure of NPP clots triggered with only thrombin
(b) thrombin and neutrophils (200,000 cells/100 µl)
(d and e) thrombin and NETs (generated from 200,000 cells/100 µl) and (f and g) NETs only were visualized by an confocal microscopy with a 40× oil immersion objective lens (1.4 NA)
f and g are images of two positions from the same slide
yellow arrows indicate NETs and white arrows indicate large pores
(h) The permeation coefficient (Darcy constant [Ks]) of clots were quantified
Other concentrations: plasma was diluted 1:6 for confocal (except in figure e was 1:3) and 1:3 for permeation
Error bars represent SEM of three technical replicates in triplicates
our data indicate that highly pure neutrophils were harvested after isolation from human blood
Our immunofluorescence results using a green dye marker for histone H3 show that both human neutrophils and differentiated PLB-985 cells successfully formed NETs which are positive for H3Cit
These findings suggest that even though DMSO-differentiated PLB-985 cells did not possess the same granules as human neutrophils
the “NETosis” capabilities of these differentiated cells are similar to that of human neutrophils
Our data altogether show that PLB-985 cells are different from neutrophils and their extracellular traps may therefore not be fully identical to NETs
experiments using this cell line were conducted prior to using human neutrophils in order to set up methods as well as prevent unnecessary blood draw
since this cell line cannot fully differentiate into primary neutrophils
it could not be a substitute for mature neutrophils
and human neutrophils were always needed to confirm experimental results
Although cDNA was also observed in the supernatant
these findings suggest that neutrophils were potentially activated to release proteins/enzymes and DNA
We also found that neutrophil-induced clotting had a significantly shorter lag time than both supernatant-induced and NETs-induced clotting
but with fluctuating turbidity curves for both neutrophil-induced and supernatant-induced clots
neutrophils were still undergoing further activation during the pre-coagulation period
The procoagulant effects we observed in neutrophil experiments may be due to mediators released from activated neutrophils
Confocal images show that NETs increased the local clot density
while neutrophils-induced clots were less stable
our results show that neutrophils and NETs have different effects on clot formation
despite the NETs being generated from neutrophils
was observed in the neutrophils’ supernatant
it has no apparent inhibitory effect on coagulation in plasmas containing FXII
we confirmed that both partially activated neutrophils and NETs delayed clot lysis to varying degrees
our permeation data show that there were no significant differences in permeability between NET-induced clots and thrombin-induced clots
suggesting their average pore sizes are similar
This may be due to the fact that NETs only increased the density of fibrin fibers in areas directly surrounding them
indicating that the overall permeability of clots was not altered
this finding indicates that the procoagulant effects of NETs could be concentration dependent
since we observed a denser clot structure in areas with more NETs
our data show that partially activated neutrophils and NETs independently promote clotting in plasma via novel mechanisms in vitro
and that FXI and to a lesser degree FXII play a role in the procoagulant effects of neutrophils but not NETs
We also find that partially activated neutrophils and NETs delay clot lysis and that clot density is visually increased in the immediate areas surrounding NETs
We propose that the procoagulant effects of neutrophils could be induced by neutrophil-secreted proteins
These findings provide unique mechanistic insights into the cross-talk between neutrophils
with important implications for diseases of thrombosis such as stroke
Targeting mechanisms involved in this cross-talk provide tempting new prospects for future therapeutics
All reagents that could be filtered were filtered with a 0.2 μm filter prior to use
5 ml of whole blood was carefully layered on the top of 5 ml Lympholyte-poly (Cedarlane)
and the layer of neutrophils and all of the isolation media below this layer were carefully transferred into a new Falcon tubes
Cells were then washed once with Hanks' Balanced Salt solution (HBSS) (without Ca2+/Mg2+) and centrifuged at 350 RCF for 10 min
then 2 ml of Red Blood Cell (RBC) Lysis Buffer (Roche) was added to the tube to lyse the residual RBC
and the cell pellet was gently resuspended
Cells were then washed once with 10 ml HBSS (without Ca2+/Mg2+) and centrifuged at 250 RCF for 5 min
the supernatant was discarded and the pellet was resuspended in 4 ml of HBSS (with Ca2+/Mg2+) or HEPES-buffered saline (HBS) ((If required for subsequent experiments
these buffers could be supplemented with 2% w/v human serum albumin (HSA) or 2% v/v fetal bovine serum (FBS))
All Blood donors provided informed written consent according to the declaration of Helsinki
and this study was approved by the University of Leeds Medicine and Health Faculty Research Ethics Committee
cells were cultured in RPMI 1640 medium (R8758
Sigma-Aldrich) supplemented with 10% heat-inactivated FBS at 37 °C in a 5% CO2 with air humidified incubator
cells were treated in RPMI 1640 medium supplemented with 1.25% Dimethyl Sulfoxide (DMSO
Sigma-Aldrich) and heat-inactivated FBS at 37 °C in 5% CO2 for 5 days
This treatment medium was renewed on day 3
The treated cells were used in experiments on day 6
round cover-slips that were pre-coated with poly-l-lysine (0.01% solution
Sigma-Aldrich) were placed in wells of a 24-well cell culture plate
then isolated neutrophils or PLB-985 cells were seeded (~ 200,000 cells) in 500 μl RPMI 1640 medium (supplemented with 2% FBS) per well and incubated at 37 °C in a 5% CO2
Cells were incubated at 37 °C in a 5% CO2 incubator overnight (minimally 2 h)
cells were treated with 20 nM PMA in a T25 flask
incubated at 37 °C in 5% CO2 for 4 h prior to experiments
samples were centrifuged at 500 RCF for 5 min to precipitate residual cells or debris
then the supernatant was centrifuged at 17,000 RCF for 15 min at 4 °C to harvest NETs
NETs were washed once with HBS by centrifugation at 17,000 RCF for 15 min at 4 °C
Before resuspended NETs were used in experiments
double-stranded DNA (dsDNA) was quantified using LabTech-Nanodrop ND100 spectrophotometer at a wavelength of 260 nm to confirm that the NET concentration was consistent in every experiment
Final concentrations were as follows: Fibrinogen System: 2 mg/ml Human Fibrinogen (von Willebrand factor and plasminogen depleted
1.5 mM CaCl2 and 200,000 cells or NETs (pre-generated from 200,000 cells) were diluted in HBS and premixed in a 96-well plate
0.1U/ml thrombin (Merck) was added to initiate clotting
every 12 s for 4 h at 37 °C by Multiskan FC Microplate Photometer (Thermo Fisher Scientific) or a PowerWave HT Microplate Spectrophotometer (BioTek)
tPA (0.03 mg/μl) was added while other conditions remained unchanged
All experiments were performed in triplicate
3.33 mM Ca2+ and 200,000 cells or NETs (pre-generated from 200,000 cells) were diluted in HBS and premixed in a 96-well plate
0.1 U/ml thrombin was added to initiate clotting
every 12 s for 4 h at 37 °C by Multiskan FC Microplate Photometer
tPA (0.03 mg/μl) was added and all other conditions remained unchanged
FXI- and FVII-deficient plasmas were purchased from George King Bio-Medical
Immunofluorescence was carried out to visualize NETs
which were generated on round coverslips as described above
Anti-Histone H3 (citrulline R2 + R8 + R17) antibody (ab5103) and Goat anti-Rabbit IgG H&L (Alexa Fluor 488) (ab150077) were obtained from Abcam
Samples on 24-well plates were fixed with paraformaldehyde (PFA
Sigma-Aldrich) for 30 min inside a fume hood at room temperature
followed by washing 3× with 1 ml PBS per well
samples were incubated in 0.5% Triton X-100 (diluted in PBS) for 1 min at room temperature
samples were incubated in blocking buffer (1% w/v bovine serum albumin (BSA)
22.52 mg/ml glycine in PBST (PBS with 0.1% v/v Tween 20)) for 30 min at room temperature to block non-specific binding of the antibodies
Following one washing step with 1% BSA in PBST
samples were incubated in 500 μl primary antibody (anti-Histone H3
1:250 diluted in 1% BSA) per well overnight at 4 °C
then incubated with secondary antibody (Goat Anti-Rabbit IgG H&L (Alexa Fluor 488)
1:500 diluted in 1% BSA) for 1 h at room temperature in the dark
followed by incubating with 300 nM 4′,6-Diamidino-2-Phenylindole
coverslips were mounted upside down onto glass slides with antifade mounting medium (Vector Laboratories)
Slides were allowed to dry for at least 1 h at room temperature in the dark
Slides were imaged via 20x (0.8 NA) or 40x (1.0 NA) lenses with Diode 405 nm laser and Argon 488 nm laser filter by using an Airyscan Upright Confocal Microscope (Zeiss LSM880) or Fluorescence Microscope (Zeiss AX10—Zen software)
Fluorescent Labeling was carried out to visualize clots
FITC labeled fibrinogen (25 μg/ml) was added into plasma
The reaction mixture was prepared by diluting plasmas (diluted 1:6 or 1:3)
CaCl2 (3.33 mM) and 200,000 cells (with 100 nM PMA) or NETs (pre-generated from 200,000 cells) in HBS
Thrombin (0.1U/ml) was added to initiate clotting
Then 30 μl of the mixture was immediately transferred into a well of an uncoated 8-well Ibidi slide (Ibidi GmbH)
The slide was placed into a dark humidity chamber for 2 h at room temperature
Slides were imaged via 40× oil immersion objective lens (1.4 NA) with Diode 405 nm laser and Argon 488 nm laser filter by using an Airyscan Inverted Confocal Microscope (Zeiss LSM880)
21–23 slices) were combined to form 3D images via Fiji-ImageJ
All statistical analyses were performed using GraphPad Prism 7
A normal distribution of the data used in two-tailed unpaired t-test was checked by Shapiro–Wilk (W) test (P > 0.05)
Differences in the expression levels of CD16 (W = 0.9306) and CD66b (W = 0.9355) on differentiated PLB-985 cells were determined by two-tailed unpaired t-test
maximum optical density (MaxOD) (W = 0.9713) and turbidity Vmax (W = 0.9130) of human neutrophil supernatant were determined by two-tailed unpaired t test
Other turbidity and lysis data were determined by one-way ANOVA analysis with Tukey's multiple comparisons test (Alpha = 0.05)
Differences in Ks were determined by one-way ANOVA with Tukey's multiple comparisons test (Alpha = 0.05)
Contrast of confocal and fluorescence images were adjusted by Fiji-Image J
P values < 0.05 were considered to indicate statistical significance
All methods and analyses were performed in accordance with the relevant guidelines and regulations
The datasets generated during and/or analysed during the current study are available from the corresponding author on reasonable request
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Baker, S. R. et al. Recurrent venous thromboembolism patients form clots with lower elastic modulus than those formed by patients with non-recurrent disease. J. Thromb. Haemost. https://doi.org/10.1111/jth.14402 (2019)
Factor XIII A-subunit V34L variant affects thrombus cross-linking in a murine model of thrombosis
An international study on the standardization of fibrin clot permeability measurement: Methodological considerations and implications for healthy control values
Download references
This work was supported by a British Heart Foundation (BHF) Programme Grant (RG/18/11/34036) and Wellcome Investigator Award (204951/B/16/Z) to RASA
George (Biomolecular Mass Spectrometry Facility
University of Leeds) for protein identification by mass spectrometry
Hardy for assistance with turbidity and lysis measurements
Discovery and Translational Science Department
Institute of Cardiovascular and Metabolic Medicine
The Astbury Centre for Structural Molecular Biology
assisted with the experiments and the analysis of the data
The authors declare no competing interests
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DOI: https://doi.org/10.1038/s41598-021-81268-7
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Metrics details
To demonstrate the long-term effect of cystotomy with or without fibrinogen clot removal for treatment-resistant cystoid macular edema (CME) secondary to branch retinal vein occlusion (BRVO)
We retrospectively analyzed medical records of 22 eyes of 22 patients with treatment-resistant CME secondary to BRVO with 12 months observation after cystotomy with or without fibrinogen clot removal
LogMAR-converted best corrected visual acuity (BCVA) was statistically better at 12 months after surgery (0.30 ± 0.30) than preoperative BCVA (0.39 ± 0.27) (p = 0.01)
The central sensitivity of microperimetry (dB) was maintained during follow-up (preoperative sensitivity: 25.4 ± 4.1
postoperative sensitivity at 12 months after the surgery: 25.9 ± 4.2
there was a significant improvement in the central retinal thickness (CRT) on optical coherence tomography (OCT) (303.7 ± 80.1) (μm) compared with the preoperative CRT (524.2 ± 114.8) (p < 0.01)
The preoperative reflectivity in cystoid cavity on OCT was significantly higher in patients with fibrinogen clot removal (n = 5) than in patients without fibrinogen clot removal (n = 17) (p < 0.01)
For treatment-resistant CME secondary to BRVO
Cystotomy with or without fibrinogen clot removal may be one of the treatment options
treatment-resistant refractory foveal cystoid macular edema (rfCME) still exists
standard therapy alone cannot achieve complete remission of macular edema in all cases
and the pathology involved in resistance to therapy remains unknown
a novel decisive therapy is yet to be developed for this unmet need
These outcomes suggest the effectiveness of cystotomy and fibrinogen clot removal for rfCME secondary to BRVO
but the details have not been investigated
This study thus aimed perform a functional and anatomical assessment of cystotomy for rfCME secondary to treatment-resistant BRVO
The change in perioperative external limiting membrane (ELM) status
and discontinuity was not statistically different between preoperative (9/5/8) and 12 months postoperative (11/5/6) (p = 0.90)
An 86-year -old woman was referred to us for the treatment of prolonged resistant cystoid macular edema (CME) secondary to branch retinal vein occlusion in the right eye
best corrected decimal visual acuity (BCVA) was 0.6
A fundus examination revealed a CME and postlaser chorioretinal scars (A)
The foveal cystoid cavity showed higher reflectivity compared to the vitreous on optical coherence tomography finding (B)
Cystotomy and fibrinogen clot removal were performed for the treatment of CME
CME subsided immediately after surgery with no recurrence during the follow-up period of 12 months (C 1 month
E 12 months after the surgery).The patient had BCVA of 1.0 at the last medical examination
The results of the preoperative blood examination were not different between the two groups (Table 2)
This result may suggest that cystotomy is not only effective for rfCME following DR
but also for CME caused by any microvascular retinal disorder
further investigations for other diseases are warranted
we speculate that in vivo overproduction of fibrinogen may be associated with the onset or progression of various microvascular retinal disorders including RVO
fibrinogen clots formed in CME are similar to those which develop in two distinct diseases of different etiologies—i.e.
DM and RVO—and future investigations are needed to study the role of the presence of fibrinogen in the onset or progression of CME
The limitations of this study are as follows
non-controlled pilot study conducted with a small sample size
and warrants a prospective controlled trial with a larger cohort for further investigation
the number of cases in which the fibrinogen clot was removed was very small
and there was a large difference between the number of total cases in the removed and non-removed groups
it is difficult to conclusively evaluate the difference in therapeutic effect between the two groups
and the comparison between the groups made in this study should be considered only as reference data
this study reported that cystostomy could resolve CME resistant to other therapies
our findings support the efficacy of cystotomy for rfCME secondary to BRVO
Anti-VEGF is the first-line therapy for CME secondary to BRVO; however
cystotomy may be an effective option for rfCME resistant to conventional treatments
it will be important to conduct a controlled trial of patients who undergo vitrectomy for CME resistant to various conservative therapies and subsequently undergo cystotomy and compare the outcomes with those who do not undergo further surgery
cystotomy with or without fibrinogen clot removal was found to be effective for the long-term anatomical and functional improvement of refractory CME secondary to BRVO
Our study was performed after obtaining the approval of the Ethics Committee of Kobe University Graduate School of Medicine (approval number: 170083)
The procedure conformed to the tenets of the Declaration of Helsinki
Patient inclusion criteria included surgeries performed at Kobe University Hospital from September 2014 through January 2019
informed consent was not obtained from each patient because of the retrospective
Although the need for informed consent was waived by the Ethics Committee of Kobe University Graduate School of Medicine
patients were able to withdraw consent any-time for providing information about this study
which could be accessed on the hospital homepage as an opt-out choice
Surgery was introduced when CME secondary to BRVO was resistant to all existing conventional treatments
such as an intravitreal anti-VEGF injection
a sub-tenon triamcinolone acetonide injection (STA)
direct photocoagulations for microaneurysms
and PPV with internal limiting membrane peeling
Intravitreal anti-VEGF administration was given at least 3 times to all patients prior to this study
The average number of doses of anti-VEGF drug is 5.9 ± 5.1
STA was performed at the discretion of the attending physician and at the patient's request
When it was judged that the causative microaneurysm could be identified from the observation of the fundus and the findings of optical coherence tomography
direct photocoagulation of the microaneurysm was performed
Due to poor response to conventional therapies such as anti-VEGF therapy
and retinal photocoagulation described above
all 22 patients underwent PPV with internal limiting membrane peeling prior to this study
The Patients who had been followed-up at least for 12 months after surgery were enrolled
The following clinical variables were analyzed: sex
best corrected decimal visual acuity (BCVA)
central sensitivity (CS) on microperimetry (MP-3; NIDEK CO.
presence or absence of fibrinogen clot removal during surgery
and the parameters determined by optical coherence tomography (OCT) including central retinal thickness (CRT) (µm)
and continuity of the external limiting membrane (ELM)
Microperimetry was performed on all patients with MP-3 in a dark room with pupillary dilation
We used the macula 12S2 program for this study
A white stimulus with Goldmann III in size and duration of 200 ms was projected onto a white background at 31.4 asb
The stimulus dynamic range for the MP-3 was 34 dB
and the light threshold was determined by a 4–2 staircase strategy
The mean retinal sensitivity of the central 9 points
was defined as CS-MP3 and used for the statistical analysis
and continuity of subfoveal ELM were assessed using spectral domain OCT (Spectralis HRA + OCT; Heidelberg Engineering
For the evaluation of cystoid cavity reflectivity
six-line radial scans (30 degrees) centered on the presumed fovea were obtained and the inverted grayscale vertical images were used for further investigation
The cystoid cavities in OCT images were circumscribed manually followed by measurement of the average reflectivity in this area using the Image J software (version 1.48
We used the reflectivity levels of the vitreous cavity as the standard in each image
The reflectivity value of the cystoid cavity relative to the vitreous cavity was calculated as an arbitrary unit (AU)
The results of preoperative blood examination were also assessed
The inspection items were as follows: blood glucose (BS) (mg/dL)
prothrombin time-international normalized ratio (PT-INR)
activated partial thromboplastin time (APTT) (s)
The unpaired t-test for continuous variables
and the chi-square test and Fisher’s exact probability test for dichotomous variables were used to compare the parameters listed above
followed by post hoc analysis using Wilcoxon t-test with Bonferroni correction
was used to evaluate the time course changes in BCVA
The Landolt-decimal BCVA was converted to the logarithm of the minimal angle of resolution (logMAR) for statistical analysis
Statistical analyses were performed using statistical software (SPSS
Statistical significance was inferred for p < 0.05
All surgeries were performed as previously reported7
standard 27-gauge PPV with a non-contact wide-angle viewing system (Resight; Carl Zeiss Meditec AG
Germany) was performed by one experienced surgeon (HI) in the same operating room
The Constellation Vision System (Alcon Laboratories
phacoemulsification and intraocular lens implantation with 2.4 mm bent transconjunctival single-plane sclera-corneal or clear corneal incision were performed using the same machine for all phakic eyes
by using 27-gauge microforceps or microscissors
the outer wall of subfoveal cystoid space was torn or incised
if the surgeon could visually confirm the presence of an exposed fibrinogen clot in the cyst space
it was directly grasped and excised using 27-gauge microforceps
STA and/or intravitreal triamcinolone acetonide injection immediately at the end of the surgery were not performed on any case in this study
If the surgeon was unable to identify the presence of a fibrinogen clot visually
no manipulation was done in the cystoid cavity
The datasets generated during and/or analyzed during the current study are available from H
the corresponding author on reasonable request
The Branch Vein Occlusion Study Group Argon laser photocoagulation for macular edema in branch vein occlusion
Prognostic factors for retinal vein occlusion: Prospective study of 175 cases
The prevalence of retinal vein occlusion: pooled data from population studies from the United States
Functional outcome of macular edema in different retinal disorders
Ang, J. L. et al. A systematic review of real-world evidence of the management of macular oedema secondary to branch retinal vein occlusion. Eye 1, 1. https://doi.org/10.1038/s41433-020-0861-9 (2020)
Cystotomy for diabetic cystoid macular edema
Effectiveness of en bloc removal of fibrinogen-rich component of cystoid lesion for the treatment of cystoid macular edema
Maki, H. et al. The long-term effect of cystotomy with fibrinogen clot removal for a cystoid macular edema secondary to idiopathic macular telangiectasia type 1: a case report. Retin. Cases Brief. Rep. 1, 1. https://doi.org/10.1097/ICB.0000000000001117 (2020)
The long-term effect of cystotomy with or without the fibrinogen clot removal for the refractory cystoid macular edema secondary to diabetic retinopathy
Nonproliferative Diabetic Retinopathy And Diabetic Macular Edema
Experimental Retinal Vein Occlusion in the Rhesus Monkey
Radioactive Microsphere and Radioautographic Studies [Proceedings]
and lipid parameters in Indian type 2 diabetic males
Elevation of fibrinogen and thrombin-antithrombin III complex levels of type 2 diabetes mellitus patients with retinopathy and nephropathy
Concentration of acute phase factors in vitreous fluid in diabetic macular edema
Vitreous fibronectin and fibrinogen expression increased in eyes with proliferative diabetic retinopathy after intravitreal anti-VEGF therapy
Characterization of the vitreous proteome in diabetes without diabetic retinopathy and diabetes with proliferative diabetic retinopathy
Immunohistochemical detection of extravasated fibrinogen (fibrin) in human diabetic retina
Risk factors for hemiretinal vein occlusion: comparison with risk factors for central and branch retinal vein occlusion: The eye disease case-control study
Hypercoagulable states in patients with retinal venous occlusion
Cardiovascular risk factors for retinal vein occlusion and arteriolar emboli: the Atherosclerosis Risk in Communities & Cardiovascular Health studies
Predictive value of the vitamin K epoxide reductase complex subunit 1 G-1639A and C1173T single nucleotide polymorphisms in retinal vein occlusion
Proteins involved in focal adhesion signaling pathways are differentially regulated in experimental branch retinal vein occlusion
Abnormal blood viscosity and haemostasis in long-standing retinal vein occlusion
Abnormal blood rheology in retinal vein occlusion: A preliminary report
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Kobe University Graduate School of Medicine
performed the critical review and revision of the manuscript
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DOI: https://doi.org/10.1038/s41598-021-88149-z
Explore our Food Tours →
we’ve grown accustomed to the barrage of lists telling us where to travel during the next 12 months
Oftentimes these places are a country or even a whole region – you could spend an entire year exploring just one of the locations listed and still barely make a dent
for us the neighborhood is the ideal unit of exploration
Celebrating neighborhood life and businesses is
essential to what we do as Culinary Backstreets
we’ve been dedicated to publishing the stories of unsung local culinary heroes and visiting them on our food walks
particularly in neighborhoods that are off the beaten path
Last January, we declared 2018 as “The Year of the Neighborhood,” and what a fruitful year it was
We had our fair share of fresh experiences and were also able to contribute to the economies of neighborhoods otherwise neglected by the tourism industry
Tourism is an important economic force in many cities
one that’s based on the sound health of all of a city’s neighborhoods
we are happy to again focus on neighborhoods off the main tourist trail in 2019
as well as the people and places that keep them going
Below is a compilation of the less-visited areas that our correspondents are planning to explore this year:
Barcelona: El Clot and Poblenou
Northeast of Barcelona’s polished Modernist center and rebuilt Gòtic alleys
the Sant Martí district straddles the line between past and future
It represents a fascinating spectrum of Barcelona
a place charged with tons of real power: some of the most exciting projects in the city like 22@ district
sit alongside traditional markets and long-standing modest homes
Yet this range is best experienced in two adjacent neighborhoods
which has sold bulk wine for over a century
a contemporary restaurant specializing in an ambitious menu of small plates intended for sharing
Perhaps no place better bridges the past and present in this area than L’Artesana
The restaurant’s name pays tribute to an old workers’ cooperative
while their contemporary takes on traditional recipes appeal to the 21st-century workers looking for a satisfying and affordable lunch – in some ways
Click here to read the full neighborhood guide
COLORADO SPRINGS, Colo. — The Air Force Academy cadet who died on his way to class last month suffered a blood clot stemming from a rare foot injury he suffered weeks earlier
according to an El Paso County coroner’s report
a 21-year-old offensive lineman on the Air Force football team
died following a “medical emergency” he suffered while leaving his dorm on Jan
The coroner’s report says Brown died of “pulmonary thromboembolism due to deep vein thrombosis resulting from Lisfranc injury of the left lower extremity.”
Brown suffered a ligament injury in his Lisfranc joint – the area where bones in the foot connect near the midfoot
The Lisfranc injury caused blood clotting in the veins of his lower leg
The Mayo Clinic describes the potential complications from deep vein thrombosis like this:
Lisfranc injuries are relatively uncommon, happening to one in 55,000 Americans and accounting for just 0.2% of broken bone injuries, according to the Cleveland Clinic.
Officials at the time of Brown’s death said life-saving measures were attempted
Brown, a Cadet 3rd Class – the Air Force classification for sophomores – played center for the academy’s football team
He played high school football in Lake Charles
staff and entire Academy have been so blessed and fortunate to have Hunter as a part of our lives
He was a pure joy to coach and have as a teammate," said Troy Calhoun
and no one unselfishly pulled harder for others than Hunter."
Brown graduated from the Air Force Academy Preparatory School in May 2021 and was pursuing a major in management
Update: Casa Lucio is sadly no longer open
Editor’s note: The year is coming to an end
which means it’s time for us to look back on all the great eating experiences we had in 2014 and name our favorites among them
make magic using excellent ingredients and regional Spanish traditions
with a little help from such wonderful additions as Italian white truffles and French foie gras
Jovells excels at bringing out the best in what’s seasonal
such as a surf and turf of mushrooms and squid
Menu mainstays like the oxtail are also brilliantly executed
the cellar holds a selection of more than 200 wines
Morro Fi was originally a bare-bones place on the corner where
locals from this part of L’Eixample would meet to have a glass of wine
Marc Monzó and Guillermo Pfaff took it over and gave it new life
for example) and international craft beers
there are more than 200 different bottled beers
The El Paso-born Lucha Libre star Cassandro el Exótico was rushed to the hospital where doctors found a blood clot in his brain
better known as Cassandro el Exótico
is a luchador who was born right here in El Paso
Cassandro is known as the Liberace of Lucha Libre
an extravagant wrestler with high-flying skills and a big personality inside and outside the ring
His name and life have become so well-known Hollywood is going to tell his life story in a movie
Cassandro el Exótico is a popular wrestler and fans were given a scare this week when he didn't show up for a match
Cassandro had a match scheduled for Monday and he wasn't feeling well
It was then that doctors discovered the clot
A video was posted on Facebook of the wrestling event shows the hosts making the announcement that they would be holding a prayer circle for Cassandro
who had been taken to the hospital for a medical emergency:
Later, an official statement was released regarding Cassandro el Exótico's condition and posted on the Solo Lucha Facebook page:
El luchador exótico fue intervenido quirúrgicamente para extraerle un coágulo del..
Posted by Sólo Lucha on Monday, May 10, 2021
We're wishing Cassandro el Exótico a speedy recovery and return to the ring
Lucha libre just isn't the same without this legendary character
The El Paso-born Lucha Libre star Cassandro el Exótico was rushed to the hospital where doctors found a blood clot in his brain.\nRead More
A video was posted on Facebook of the wrestling event shows the hosts making the announcement that they would be holding a prayer circle for Cassandro
Later, an official statement was released regarding Cassandro el Exótico's condition and posted on the Solo Lucha Facebook page:
Posted by Sólo Lucha on Monday, May 10, 2021
NEW YORK (AP) — Al Roker is recovering after he was hospitalized last week for blood clots
the NBC "Today" show weather anchor said Friday
"So many of you have been thoughtfully asking where I've been
Last week I was admitted to the hospital with a blood clot in my leg which sent some clots into my lungs," Roker
I am so fortunate to be getting terrific medical care and on the way to recovery," he wrote
"Thanks for all the well wishes and prayers and hope to see you soon
His co-anchors wished him well online and on the show
counting the days xoxoxo," Hoda Kotb said in a comment on Roker's post
we've all talked to him," Savannah Guthrie said on Friday's show
It wasn't immediately announced whether Roker would be able to co-host NBC's coverage of the Macy's Thanksgiving Day Parade
Roker also was off the air in 2020 for two weeks after he underwent successful surgery for prostate cancer
Roker said he went public with his diagnosis to highlight the risk of prostate cancer
The preservation and protection of heritage and the promotion of protected housing in the neighbourhoods of El Clot and El Camp de l’Arpa will be assured with the initial approval of an amendment to the General Metropolitan Plan by the Commission for Ecology
The previous heritage protection for both neighbourhoods was set out in the Protection Plan for the Architectural
Historical and Artistic Heritage of Sant Martí
an update was needed to the heritage protection regulations for the character of the two neighbourhoods
The update was also needed for defining measures to foster new protected housing
a suspension was introduced on permits for new buildings and major renovations so that the new urban planning could be drafed
The document now presented updates the regulations to ensure that both neighbourhoods conserve their identity
the amendment to the plan proposes 13 new heritage sets and 12 new individual elements
149 new plots are being proposed for heritage protection
bringing the overall number to 204 protected plots
The amendment to the plan also introduces rules that determine the urban protection of various corridors
settings and traditional façades with heritage value
The proposal includes 589 plots where any work or change would have to take into account the aesthetic and compositional criteria of buildings to integrate the architectural project into the landscape and identity of their façades
Of the 2,664 plots in the areas covered by the MPGM
the proposal includes protection for 793 of them
meaning that practically a third would get some sort of protection
One of cornerstones of the new urban planning is to favour public housing
It combines measures such as expropriation
quotas reserved for protected housing on unconsolidated urban land and the general classification of protected housing
The plan is for a potential volume of between 1,000 and 1,500 new protected homes
436 of them on the initiative of the City Council to guarantee that local people continue living in these neighbourhoods
Revision of effects for current urban planning
The document revises the effects for current urban planning and sets out a series of criteria for addressing these
The criteria refer to the relationship between the element and the façade
the heritage interest and consolidation of the element and the presence of party walls in relation to the façade
Plots given over to green space will gain another 3,000 square metres
while there are another 11,000 square metres for facilities
The project also promotes sustainable mobility and commerce and applies environmental criteria to increase greenery and biodiversity in urban interventions
An extensive participatory process was involved to create the document for initial approval
along with the main organisations in the neighbourhoods
Four sessions were held with members of the public
along with five sectoral meetings to work on areas such as facilities
There were also two feedback sessions and two exploratory walks
A monitoring commission has also been set up with the presence of the local residents’ association for the two neighbourhoods
the Federació d’Entitats and the Taller d’Història del Clot – Camp de l’Arpa
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It's time for a new edition of La Puça in the Clot neighbourhood
You'll find stalls of second-hand treasures
artisan crafts and vintage delights in a lovely area of the city
Do some shopping and get to know a lesser-explored part of Barcelona while you're at it
Volume 12 - 2021 | https://doi.org/10.3389/fmicb.2021.649534
Bacterial infection and thrombosis are highly correlated
especially in patients with indwelling medical devices
are a common cause of medical device infections owing to their biofilm forming capacity which provides protection from antibiotics and host immune response
Attention has been drawn to the interaction between S
little is known regarding the impact of the transition from planktonic to biofilm forming phenotype on this interaction
Here we investigate the growth phase dependence of bacteria-fibrinogen interaction and the resulting effect on fibrin clot formation
Flow cytometry demonstrated growth phase dependent affinity for fibrinogen
epidermidis to a fibrinogen coated surface under continuous flow conditions in vitro
The bacterial deposition rate onto fibrinogen was significantly greater for stationary (5,360 ± 1,776 cells/cm2s) versus exponential phase (2,212 ± 264
the expression of sdrG–a cell surface adhesion protein with specificity for fibrinogen–was upregulated ∼twofold in the stationary versus the exponential phase
Rheometry and confocal microscopy demonstrated that stationary phase S
epidermidis slows clot formation and generates a more heterogeneous fibrin network structure with greater elasticity (G′ = 5.7 ± 1.0 Pa) compared to sterile fibrinogen (G′ = l.5 ± 0.2 Pa)
while exponential phase cells had little effect
This work contributes to the current understanding of the growth phase dependent regulation of bacterial virulence factors and the correlation between bacterial infection and thrombosis
SdrG is considered a critical mediator of the interaction between S
Once the biofilm becomes densely populated and encased in EPS
some of the bacteria detach as planktonic (i.e.
flocs) of bacteria that can attach to a new substrate elsewhere and develop another biofilm
Each phase of the life cycle requires specific protein machinery to be most effective and the bacteria display phenotypic changes as they progress from planktonic to biofilm phenotype
While the change in phenotype is key in biofilm formation
little is known about the impact of growth phase on bacteria-host protein interaction
epidermidis binding to fibrinogen focuses specifically on cells in the stationary phase of growth
The goal of this work is to explore the phenotypic differences between stationary and exponential phase S
epidermidis in the scope of their interactions with fibrinogen and their impact on fibrin network formation
We first applied flow cytometry to characterize the growth-phase dependent bacterial affinity for fibrinogen
Understanding that force/shear loading affect fibrinogen binding
epidermidis surface deposition onto fibrinogen in a continuously flowing model mimicking seeding of an intravascular device
we compared phase differences in gene expression of S
epidermidis cell surface proteins with potential impact on adhesion and interaction with host coagulation proteins
we performed rheology and confocal microscopy to evaluate the structure and mechanics of exponential versus stationary phase S
A 30 mL sample of the culture at this phase was removed and left undisturbed for 30–60 min at room temperature to allow for settling of flocculated cells prior to use in subsequent studies
the remaining culture was returned to the incubator at 37°C to continue growth under agitation until an optical density of 1.4 ± 0.05 was obtained
Since rheometry experiments required significantly larger volumes
separate cultures were grown to exponential and stationary phases as defined above
Staphylococcus epidermidis were cultured to exponential and stationary phase as described above
Cell density was quantified in each sample with a Incyto Hemacytometer (Thermo Fisher Scientific
United States) and cells were centrifuged into a pellet at 5,000 rpm for 3 min
and pelleted cells were diluted to concentration of 2.0 × 109 cells/mL
Two conditions were prepared in triplicate for each growth phase–unlabeled control and labeled fibrinogen
Control and labeled fibrinogen pellets were resuspended in 1X Hank’s Buffered Salt Solution (with Calcium
Fluorescently labeled fibrinogen (Alexafluor 647 Fibrinogen
United States) was added to a final concentration of 0.5 mg/mL and incubated for 15 min
Cells were then analyzed by flow cytometry (Cytoflex
Histograms of area fluorescence (excitation 650 nm/emission 668 nm) from 105 events per sample were obtained
Mean fluorescence intensity (MFI) was determined as a surrogate for total fibrinogen concentration on the cell surface using FCS Express (v.7
Nine experiments were completed in triplicate with the median and interquartile range (IQR) reported
Statistical analyses were performed with Wilcoxon paired signed rank test with significance defined as p < 0.05
The stationary phase sample was diluted with normal saline to match optical density of the exponential phase culture then left undisturbed at 20°C for 1 h to remove large flocculates
Exponential and stationary phase cells were fluorescently labeled with Syto 9 (Thermo Fisher Scientific
Cells were loaded into a 10 mL syringe on a standard syringe pump (Harvard Apparatus)
Fibrinogen coated glass coverslips were assembled into a parallel-plate flow chamber (Warner instruments RC-31 with 250 μm thick
Cell suspensions were infused at a rate of 125 μL/min (Reynolds number = 1.2
wall shear stress = 0.067 Pa) through the parallel-plate flow chamber mounted on a epifluorescent microscope (Nikon Eclipse 80i)
A total of 10 experiments were completed in duplicate and the mean for each experiment was used
Custom image analysis was performed using MATLAB (v.R2018b
a new adhesion event was defined as the new appearance of a bacterium which persisted for two or more consecutive images in a single location
The deposition rate was calculated as the slope of adhesion events versus time for each experimental replicate
Residence time was defined as the total time a single bacterium persisted at a single location
Student’s paired t-test was used for hypothesis testing comparing deposition rate
versus growth phase with p < 0.05 defined as significant
a χ2 test was used to compare the population of bacteria persisting for greater than 500 s for each growth phase with significance defined as p < 0.01
epidermidis grown to either exponential or stationary phase
One mL of bacterial cultures was centrifuged at 8,000 rpm for 1 min to pellet the cells
Cell lysis was achieved with 5 μL lysostaphin (2 μg/μL)
incubation at 37°C for 45 min followed by addition of 75 μL of TRIzol and vigorous pipetting
Samples were vortexed and then centrifuged at 12,000 rpm for 10 min at 4°C
Supernatant was removed and incubated at room temperature for 5 min
Chloroform (15 μL) was added to the sample
and incubated at room temperature for 3 min
samples were centrifuged at 12,000 rpm for 15 min at 4°C
The aqueous phase was isolated and transferred to RNeasy Mini Kit spin columns (Qiagen) and RNA was purified per the manufacturer’s instructions
High quality RNA yield was confirmed by UV spectrophotometry (NanoDrop 2000
Thermo Scientific) and RNA integrity was confirm using a Bioanalyzer (Agilent 2100)
Samples were stored at –80°C prior to RT-PCR
exponential phase) was determined using the ΔΔCT method with the 16s ribosomal subunit as an endogenous control
Student’s t-test was used for hypothesis testing of significance (p < 0.05) of the fold change in gene expression
p-values were corrected for multiple comparisons using Benjamin-Hochberg control of false-discovery rate
Statistical comparisons were made via ANOVA with post-hoc pair-wise Tukey test with significance level of p < 0.05
Figure 1A shows an example of a single flow cytometry experiment to quantify fibrinogen affinity. The mean fluorescence of the stationary phase population is greater than that of the exponential phase with a similar distribution. Composite mean fluorescence index of all experiments (N = 9 with triplicate measures) is shown in Figure 1B
epidermidis incubated with fluorescently labeled fibrinogen was significantly higher as compared to exponential phase under the same condition (3,642 ± 349 vs
Flow cytometry of Staphylococcus epidermidis incubated with fluorescently labeled fibrinogen
(A) Example density plot of fibrinogen fluorescence for a single flow cytometry experiment
(B) Standard box (IQR) and whiskers (1.5*IQR) plot of mean fluorescence of S
epidermidis in exponential versus stationary phase
Bacterial cell concentration was 4 × 109 cells/mL and fibrinogen concentration was 0.5 mg/mL
N = 9 paired experiments with triplicate measurements
Most notably there was a population of stationary phase cells that had a residence time of greater than 500 s
skewing the distribution to the right as compared to the exponential phase
only 2.7% of exponential cells had a residence time of greater than 500 s while 13.1% of the stationary phase cell had a residence time greater than 500 s (p = 0.004)
epidermidis to a fibrinogen coated surface under continuous flow
(A–E) Representative sequential images of fluorescently labeled S
epidermidis (green) captured every 3 s with absence of a cell in white frame in panel (A)
adhesion event demonstrated in frames (B–D) and subsequent absence in panel (E) representing a release event
Time between frames (B–E) represents the residence time of that single cell
(F) Graphical representation of a single experiment of adhesion events over time for exponential (green) versus stationary phase (red)
(G) Deposition rate of exponential versus stationary phase S
epidermidis for N = 10 paired experiments with duplicate measures
(H) Residence time probability distribution of exponential versus stationary phase S
epidermidis for all 10 paired experiments with duplicate measures
There was a 3.5-fold increase in sspA expression in the stationary versus exponential phase
icaR showed a decrease in expression in the transition from exponential to stationary phase
Fold change in gene expression for stationary (Sp) versus exponential phase (Ep)
The first step represents a transient plateau at a lower elastic modulus than the pure fibrin clot
This plateau is followed by a second rapid increase in G′ to a final steady-state value of 5.7 ± 1.0 Pa
This two-step kinetic profile of clot formation is completely absent for exponential phase S
epidermidis of the same cell concentration
the steady state for this condition is not reached within 100 min
The growth of the elastic modulus of the exponential phase is significantly retarded relative to the stationary phase
Its kinetics are also somewhat slower than pure fibrin
The final (t = 100 min) modulus of the exponential phase is not significantly lower than that of pure fibrin (1.3 ± 0.4 Pa)
Staphylococcus epidermidis alters fibrin elasticity and structure in a growth phase dependent manner
of pure fibrin clot (0.5 mg/mL) (black) and fibrin clots infected by stationary and (red)
Error bars denote standard deviation with N = 3
(B) Mesh size characterization of steady-state pure fibrin clot and fibrin clots infected with stationary and exponential phase S
Error bars denote standard deviations with N = 5
Note that the stack bars (gray and red) in the stationary phase condition indicate two characteristic mesh sizes
(C) Axial projections of a pure fibrin clot
a fibrin clot infected with (D) exponential and (E) stationary phase S
cell concentrations are all 4 × 109 cells/mL and fibrin concentration is 0.5 mg/mL
but rather some other difference in the bacteria related to its growth phase
There are likely many other phenotypic differences associated with growth phase that aid in survival and virulence
This study demonstrates the growth phase dependent interactions between S
We further elucidated the resulting growth phase dependent effect of S
epidermidis in its stationary phase–versus exponential phase–expresses more sdrG
and adheres more frequently and for a longer duration to a fibrinogen coated surface
epidermidis during thrombin-catalyzed polymerization of fibrinogen generates a heterogeneous fibrin network structure that is four times stiffer than pure fibrin in its absence
This effect is not observed if exponential phase S
Here we consider the possible explanations for the correlation between adhesion to fibrinogen and the resulting influence on fibrin clot formation
and increased risk of embolism as a potential virulence factor for biofilm infected indwelling medical devices
The resulting disorganized fibrin network microstructure leads to instability and ultimately rupture
a serine protease which cleaves fibrinogen
may offer an additional means of dispersion via thromboembolism and further disseminate infection
the exact contribution of this protease to clot rupture was not specifically evaluated in this study and is the subject of future work
Figure 4. Hypothesized mechanism for the observed phenomenon in Figure 3
epidermidis cells (blue circles) have sufficient affinity for fibrinogen (red lines)
the attraction between cells and fibrinogen generate a heterogeneous fibrinogen distribution that results in a heterogeneous fibrin network structure
This has profound implications on fibrin network elasticity and ultimately potential for embolization
the potential for adhesion to a new surface location is facilitated and the process starts anew
this study demonstrates the growth phase dependent interaction between S
epidermidis and fibrinogen and the resulting effect of S
It contributes to the current understanding of growth phase dependent regulation of S
epidermidis virulence factors and the association between bacterial infection and thrombosis
It also provides fodder for investigation of the mechanisms of and pharmaceutical solutions to infection-induced thromboembolism
and EM-N performed the experiments and generated the data
This work was supported by the National Institutes of Health (NIH)
National Institute of General Medical Sciences (NIGMS) under Grant GM-081702
and National Institute of Allergy and Infectious Diseases (NIAID) under Grant AI-128006
The Supplementary Material for this article can be found online at: https://www.frontiersin.org/articles/10.3389/fmicb.2021.649534/full#supplementary-material
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*Correspondence: J. Scott VanEpps, anZhbmVAbWVkLnVtaWNoLmVkdQ==; Michael J. Solomon, bWpzb2xvQHVtaWNoLmVkdQ==
†These authors have contributed equally to this work
Metrics details
A prothrombotic state is a typical feature of type 2 diabetes mellitus (T2DM)
A variety of poorly elucidated mechanisms behind impaired fibrinolysis in this disease have been reported
indicating complex associations between platelet activation
elevated plasminogen antigen inhibitor-1 levels which are closely associated with obesity
Abnormal fibrin clot structure is of paramount importance for relative resistance to plasmin-mediated lysis in T2DM
increased release of neutrophil extracellular traps
along with posttranslational modifications of fibrinogen and plasminogen have been regarded to contribute to altered clot structure and impaired fibrinolysis in T2DM
Antidiabetic agents such as metformin and insulin
have been reported to improve fibrin properties and accelerate fibrinolysis in T2DM
recent evidence shows that hypofibrinolysis
has a predictive value in terms of cardiovascular events and cardiovascular mortality in T2DM patients
This review presents the current data on the mechanisms underlying arterial and venous thrombotic complications in T2DM patients
with an emphasis on hypofibrinolysis and its impact on clinical outcomes
We also discuss potential modulators of fibrinolysis in the search for optimal therapy in diabetic patients
the current evidence indicates that T2DM substantially elevates arterial thromboembolic risk
while its impact on VTE risk and complications is largely associated with increased BMI
The most relevant research on hypofibrinolysis and its clinical implications in T2DM was reviewed
We included papers regarding the cellular components
including platelet hyperactivity and pathological structure and function of erythrocytes
They have been followed by papers describing the endothelial dysfunction
enhanced thrombin generation (TG) and inflammatory state
including neutrophil cellular traps (NETs)
Then we proceeded to the review of literature in the topic of qualitative and quantitative changes of fibrinogen
with a special emphasis on the posttranslational modifications of fibrinogen
This has been followed by the analogical modifications of proteins involved in fibrinolysis
In the part devoted to the pharmacological interventions
Results of basic research and clinical trials were selected from PubMed and Web of Science from January 2000 to May 2021
supported by a few seminal papers from previous years
Mechanisms involved in hypofibrinolysis in type 2 diabetes mellitus (T2DM) patients
The main contributors to hypofibrinolysis in T2DM are platelet activation
increased fibrinogen level along with its modifications
Obesity represented by high body mass index (BMI)
Glc) all lead to platelet activation reflected by increased release of thromboxane A2 (TXA2)
Another contributor to platelet activation is oxidative stress
which is reflected by increased synthesis of F2-isoprostane 8-iso-prostaglandin F2α (8-iso-PGF2α)
a product of low-density-lipoprotein (LDL) cholesterol peroxidation
Down-regulation of the insulin receptor substrate 1 (IRS-1) and phosphatidylinositol 3-kinase (PI3K) pathways with enhancement of mitogen-activated protein kinase (MAPK) result in decreased nitric oxide (NO) synthesis and increased PAI-1 release
Advanced glycation end-products (AGE) stimulate overactive NADPH oxidases (NOX)
reactive oxygen species (ROS)-producing enzyme complexes
which in turn generates tissue factor (TF) in ECs
AGE stimulate monocytes (Mo)/macrophages (Ma) to produce increased amounts of TF
Another source of TF are the vascular smooth muscle cells (VSMCs)
Increased TF initiates the extrinsic pathway of coagulation and together with factor VII (VIIa
activated factor VII) lead to enhanced thrombin generation
Weibel-Palade bodies release increased amounts of von Willebrand factor (vWF)
which along with increased factor VIII (VIIIa
form the intrinsic pathway of thrombin generation
Increase in both components of the prothrombinase complex
Other factors underlying enhanced thrombin generation are central obesity represented by increased waist-hip circumference (WHC) ratio
and time since T2DM diagnosis exceeding 5 years
increased interleukins 6 and 8 (IL-6 and IL-8)
along with ROS stimulate neutrophils to form the neutrophil extracellular traps (NETs)
with an important stage of chromatin decondensation mediated by peptidylarginine deiminase 4 (PAD4)
followed by a release of nuclear components depicted in light blue
and granular components depicted in dark blue
myeloperoxidase (MPO) and neutrophil elastase (NE)
Obesity represented by increased BMI elevates both CRP and complement C3 (C3) levels
IL-6 and insulin resistance contribute to elevated fibrinogen concentration
while hyperglycemia and ROS result in posttranslational modifications
such as fibrinogen glycation (–Glc) and oxidation (–ROS)
The fibrin network formed from modified fibrinogen
with increased amounts of incorporated α2-antiplasmin (a2AP)
characterized by enhanced crosslinking by factor XIII (FXIII)
being composed of thinner and highly branched fibrin fibers
increased amount of polyhedrocytes are found in the contracted thrombi of diabetic patients
diminished binding of plasminogen and tissue plasminogen activator (tPA) to fibrin
originating from adipocytes and hepatocytes
are also involved in hypofibrinolysis observed in T2DM
Glycation of plasminogen was reported in type 1 diabetes mellitus patients and therefore is marked with asterisks
α2-antiplasmin is another protein implicated in fibrinolysis and found to be glycated in T2DM
and this can be most likely extrapolated to diabetic patients
enhanced TX-dependent platelet activation is a typical phenomenon in T2DM patients and is associated with oxidative stress
at least in part through enhanced release of PAI-1 and PMP
changes in ultrastructure of the erythrocyte membrane result in its altered mechanical properties
the current evidence convincingly shows that endothelial dysfunction in T2DM
driven by disturbed signaling in the arterial wall along with overactive NOX
is related to hypofibrinolysis through increased expression of PAI-1
current evidence supports the role of enhanced TG in the development of cardiovascular complications in T2DM patients
with some of these complications likely being related to hypofibrinolysis
many recent investigations have revealed that NETs and complement C3 are novel contributors to hypofibrinolysis in T2DM
Their prognostic value regarding cardiovascular mortality in T2DM remains to be established
hyperfibrinogenemia might contribute to decreased fibrin clot lysability and subsequent thromboembolism in T2DM patients; however
its impact does not appear to be independent of other cardiovascular risk factors
although some of the oxidized sites were near these crucial sites
current evidence shows that the diabetic milieu promotes fibrinogen modifications
which are of paramount importance in the formation of abnormal fibrin clot structure
this could be due to different glycation patterns; however
this should be investigated in future studies
modifications of both fibrinogen and plasminogen are implicated in hypofibrinolysis in T2DM
with possible links to compromised fibrinolysis
Whether this would serve some pathway how empagliflozin could decrease prothrombotic tendency in T2DM
current data suggest that iron may be involved in hypofibrinolysis in T2DM
there have been no reports on the effect of the new antidiabetic drugs on clot lysis time in patients with T2DM
The current evidence indicates that impaired fibrinolysis characterizes patients with T2DM
the optimal test to assess the efficiency of fibrinolysis in this disease remains to be established given several assays used in clinical studies in recent years and their limitations
Recent studies have identified novel mechanisms involved in hypofibrinolysis in T2DM
including NETs and posttranslational modifications of proteins involved in fibrin formation and lysis
including the fact that prolonged T2DM duration and decreased glycemic levels are factors contributing to altered fibrin structure and impaired lysis
The beneficial effects of antidiabetic drugs
could be at least in part associated with fibrinolysis
Novel antidiabetic drugs are undoubtedly an integral part of T2DM treatment
it is required that further studies regarding their impact on fibrinolysis be conducted
Due to the major involvement of protein glycation
it might be speculated that all hypoglycemic agents may improve fibrinolysis
treatment with low-dose FXa inhibitors and aspirin in diabetic patients at high risk for cardiovascular mortality could also be beneficial in terms of fibrinolysis
multiple interventions are needed to improve fibrinolysis in T2DM
Further studies are needed to evaluate the actual role of enhanced fibrinolysis in the prevention of morbidity and mortality in a rapidly growing population of patients with T2DM worldwide
Thrombin-activatable fibrinolysis inhibitor
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Bβarg448lys polymorphism is associated with altered fibrin clot structure and fibrinolysis in type 2 diabetes
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Plasma fibrin clot properties and cardiovascular mortality in patients with type 2 diabetes: a long-term follow-up study
Synergistic effects of hypofibrinolysis and genetic and acquired risk factors on the risk of a first venous thrombosis
Basic mechanisms and regulation of fibrinolysis
Thromboxane biosynthesis and platelet function in type II diabetes mellitus
and hypertension but not vascular disease per se are associated with persistent platelet activation in vivo: evidence derived from the study of peripheral arterial disease
In vivo formation of 8-iso-prostaglandin and platelet activation in diabetes mellitus: effects of improved metabolic control and vitamin E supplementation
Postprandial hyperglycemia is a determinant of platelet activation in early type 2 diabetes mellitus
Thromboxane-dependent CD40 ligand release in type 2 diabetes mellitus
Thromboxane-dependent platelet activation in obese subjects with prediabetes or early type 2 diabetes: effects of liraglutide-or lifestyle changes-induced weight loss
Oxidative stress-related mechanisms affecting response to aspirin in diabetes mellitus
Inhibition of platelet-collagen interaction
An in vivo action of insulin abolished by insulin resistance in obesity
Association between increased platelet P-selectin expression and obesity in patients with type 2 diabetes
PAI-1 in diabetes: Pathophysiology and role as a therapeutic target
Plasminogen activator inhibitor is elevated in plasma and diminished in platelets in patients with diabetes mellitus
Qualitative scanning electron microscopy analysis of fibrin networks and platelet abnormalities in diabetes
Platelet activity and hypercoagulation in type 2 diabetes
PAR-4/Ca2+-calpain pathway activation stimulates platelet-derived microparticles in hyperglycemic type 2 diabetes
Circulating microparticles alter formation
Interplay between ultrastructural findings and atherothrombotic complications in type 2 diabetes mellitus
Clot contraction: compression of erythrocytes into tightly packed polyhedra and redistribution of platelets and fibrin
Polyhedrocytes in blood clots of type 2 diabetic patients with high cardiovascular risk : association with glycemia
Endothelial dysfunction in insulin resistance and type 2 diabetes
Hypoglycaemia leads to a delayed increase in platelet and coagulation activation markers in people with type 2 diabetes treated with metformin only: results from a stepwise hypoglycaemic clamp study
Effects of equivalent sympathetic activation during hypoglycemia on endothelial function and pro-atherothrombotic balance in healthy individuals and obese standard treated type 2 diabetes
Dependence of augmentation of arterial endothelial cell expression of plasminogen activator inhibitor type 1 by insulin on soluble factors released from vascular smooth muscle cells
Plasminogen activator inhibitor 1: biosynthesis and mRNA level are increased by insulin in cultured human hepatocytes
Production of plasminogen activator inhibitor 1 by human adipose tissue: possible link between visceral fat accumulation and vascular disease
Tissue factor pathway inhibitor and other endothelium-dependent hemostatic factors in elderly individuals with normal or impaired glucose tolerance and type 2 diabetes
Predictors of neutrophil extracellular traps markers in type 2 diabetes mellitus: associations with a prothrombotic state and hypofibrinolysis
Insulin resistance is associated with increased circulating level of thrombin-activatable fibrinolysis inhibitor in type 2 diabetic patients
Relationship between soluble thrombomodulin in plasma and coagulation or fibrinolysis in type 2 diabetes
Endothelial dysfunction: is there a hyperglycemia-induced imbalance of NOX and NOS
Activation of NADPH oxidase by AGE links oxidant stress to altered gene expression via RAGE
Effect of advanced glycation end product-modified on tissue factor expression by monocytes: role of oxidant stress and protein tyrosine kinase activation
Advanced glycosylation end products induced tissue factor expression in human monocyte-like U937 cells and increased tissue factor expression in monocytes from diabetic patients
Circulating tissue factor procoagulant activity and thrombin generation in patients with type 2 diabetes: effects of insulin and glucose
MicroRNA-19a contributes to the epigenetic regulation of tissue factor in diabetes
Vascular miR-181b controls tissue factor-dependent thrombogenicity and inflammation in type 2 diabetes
Hypercoagulability in patients with type 2 diabetes mellitus detected by a thrombin generation assay
Thrombin generation in type 2 diabetes with albuminuria and macrovascular disease
High coagulation factor levels and low protein C levels contribute to enhanced thrombin generation in patients with diabetes who do not have macrovascular complications
Impaired glucose metabolism and type 2 diabetes are associated with hypercoagulability: potential role of central adiposity and low-grade inflammation—the Hoorn study
Low fasting glucose is associated with enhanced thrombin generation and unfavorable fibrin clot properties in type 2 diabetic patients with high cardiovascular risk
Diabetes is a proinflammatory state: a translational perspective
Extracellular DNA traps promote thrombosis
High glucose modulates IL-6 mediated immune homeostasis through impeding neutrophil extracellular trap formation
Neutrophil extracellular traps kill bacteria
Extracellular histones promote thrombin generation through platelet-dependent mechanisms: involvement of platelet TLR2 and TLR4
NETosis is induced by high glucose and associated with type 2 diabetes
Neutrophil extracellular traps and endothelial dysfunction in atherosclerosis and thrombosis
Complement C3 is a novel plasma clot component with anti-fibrinolytic properties
Hypofibrinolysis in type 2 diabetes: the role of the inflammatory pathway and complement C3
The relative kinetics of clotting and lysis provide a biochemical rationale for the correlation between elevated fibrinogen and cardiovascular disease
Structural origins of fibrin clot rheology
Sex-specific alteration to α2-antiplasmin incorporation in patients with type 2 diabetes
Fibrinogen and AER are major independent predictors of 11-year cardiovascular mortality in type 2 diabetes: the Casale Monferrato study
Circulating inflammatory markers and the risk of vascular complications and mortality in people with type 2 diabetes and cardiovascular disease or risk factors: the advance study
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The influence of type 2 diabetes on fibrin structure and function
Hyperglycemia is associated with enhanced thrombin formation
and fibrin clot resistance to lysis in patients with acute coronary syndrome
The influence of type 2 diabetes on fibrin clot properties in patients with coronary artery disease
Glycaemic control improves fibrin network characteristics in type 2 diabetes—a purified fibrinogen model
Fibrin fiber stiffness is strongly affected by fiber diameter
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Identification of glycated and acetylated lysine residues in human α2-antiplasmin
Interaction of glycated and acetylated human α2-antiplasmin with fibrin clots
The level of circulating fibroblast activation protein correlates with incorporation of alpha-2-antiplasmin into the fibrin clot
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This work was supported by the Jagiellonian University Medical College (K/ZDS/005802 to A.U.)
AHB-W contributed to the work by reviewing literature
AU conceived the topic and revised the manuscript
Both authors read and approved the final manuscript
The authors declare that they have no competing interests
unless otherwise stated in a credit line to the data
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DOI: https://doi.org/10.1186/s12933-021-01372-w
WASHINGTON - Doctors treating Secretary of State Hillary Rodham Clinton for a blood clot in her head said blood thinners are being used to dissolve the clot and they are confident she will make a full recovery
Clinton didn't suffer a stroke or neurological damage from the clot that formed after she suffered a concussion during a fainting spell at her home in early December
was admitted to New York-Presbyterian Hospital on Sunday when the clot turned up on a follow-up exam on the concussion
The clot is located in the vein in the space between the brain and the skull behind the right ear
She will be released once the medication dose for the blood thinners has been established
Lisa Bardack of the Mount Kisco Medical Group and Dr
Gigi El-Bayoumi of George Washington University said Clinton was making excellent progress and was in good spirits
Clinton's complication "certainly isn't the most common thing to happen after a concussion" and is one of the few types of blood clots in the skull or head that are treated with blood thinners
a neurologist who is director of Duke University's stroke center
The area where Clinton's clot developed is "a drainage channel
the equivalent of a big vein inside the skull
It's how the blood gets back to the heart," Goldstein said
Blood thinners usually are enough to treat the clot and it should have no long-term consequences if her doctors are saying she has suffered no neurological damage from it
then fell ill with a stomach virus in early December that left her severely dehydrated and forced her to cancel a trip to North Africa and the Middle East
she had canceled only two scheduled overseas trips
one to Europe after breaking her elbow in June 2009 and one to Asia after the February 2010 earthquake in Haiti
fell and suffered a concussion while at home alone in mid-December as she recovered from the virus
This isn't the first time Clinton has suffered a blood clot
midway through her husband's second term as president
Clinton was in New York fundraising for the midterm elections when a swollen right foot led her doctor to diagnose a clot in her knee requiring immediate treatment
Clinton had planned to step down as secretary of state at the beginning of President Barack Obama's second term
Whether she will return to work before she resigns remained a question
Democrats are privately if not publicly speculating: How might her illness affect a decision about running for president in 2016
Clinton says she plans to spend the next year resting
She has long insisted she had no intention of mounting a second campaign for the White House four years from now
and she would almost certainly emerge as the Democrat to beat if she decided to give in to calls by Democratic fans and run again
Her age - and thereby health - would probably be a factor under consideration
given that Clinton would be 69 when sworn in
That might become even more of an issue in the early jockeying for 2016 if what started as a bad stomach bug becomes a prolonged
Not that Democrats are willing to talk openly about the political implications of a long illness
choosing to keep any discussions about her condition behind closed doors
Democrats reject the notion that a blood clot could hinder her political prospects
"Some of those concerns could be borderline sexist," said Basil Smikle
a Democratic strategist who worked for Clinton when she was a senator
"Dick Cheney had significant heart problems when he was vice president
It isn't uncommon for presidential candidates' health - and age - to be an issue
had to rebut concerns he was too old to be commander in chief or that his skin cancer could resurface
Two decades after Clinton became the first lady
signs of her popularity - and her political strength - are ubiquitous
Obama had barely declared victory in November when Democrats started zealously plugging Clinton as their strongest White House contender four years from now
"Wouldn't that be exciting?" House Democratic leader Nancy Pelosi declared in December
Even Republicans concede that were she to run
Clinton would be a force to be reckoned with
"Trying to win that will be truly the Super Bowl," Newt Gingrich
the former House Speaker and 2012 GOP presidential candidate
"The Republican Party today is incapable of competing at that level."
Americans admire Clinton more than any other woman in the world
according to a Gallup poll released Monday - the 17th time in 20 years that Clinton has claimed that title
And a recent ABC News/Washington Post poll found that 57 percent of Americans would support Clinton as a candidate for president in 2016
Websites have already cropped up hawking "Clinton 2016" mugs and tote bags
Clinton's three-week absence from the State Department has raised eyebrows among some conservative commentators who questioned the seriousness of her ailment after she canceled planned Dec
20 testimony before Congress on the deadly attack on the U.S
Clinton had been due to discuss with lawmakers a scathing report she had commissioned on the attack
It found serious failures of leadership and management in two State Department bureaus were to blame for insufficient security at the facility
Clinton took responsibility for the incident before the report was released
Four officials cited in the report have either resigned or been reassigned
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TravelPerk serves businesses around the world through its team of over 1,200 employees who work across offices in Europe and the United States
Dynatrace provides B2B companies with software for observability and continuous runtime application security
Its platform maintains digital borders and responds to IT issues
which enables users to automate cloud operations
The company’s Barcelona office is a short walk from Parque del Clot.
Mirakl was founded in 2012 and has an office in the Sant Gervasi-Galvany area
The company provides B2B and retail brands with digital products
Its solutions include Mirakl Platform for setting up online marketplaces
which allows sellers to receive secure payments
which makes personalized product recommendations based on artificial intelligence.
Personio serves small and medium-sized businesses as an all-in-one HR solution to streamline the people management cycle
it enables brands to manage their employees and scale up their business
The company has its office on the banks of Jardines de Salvador Espriu.
CrowdStrike provides cybersecurity services such as threat intelligence
It uses artificial intelligence to provide endpoint threat protection
The company’s solutions are used in areas that include retail
Mixpanel has an office in El Parc i la Llacuna del Poblenou
The company’s event analytics platform enables users to glean revenue and customer data insights
Its platform creates real-time charts to show how people interact with a user’s brand and products
with data like retention and conversion rates
The AirDNA platform offers short-term rental intelligence based on a database that encompasses 10 million rental properties across thousands of global markets
The company’s solutions serve more than 1.3 million users
Rose Velazquez contributed reporting to this story
growing up gay in Ireland and writing his first poetry collection at the age of 66
In bed he amuses himself by identifying the difference between blood clots (a new emergency) and cancer: “Boris Johnson would be a blood clot … Angela Merkel the cancer.”
He is surely Ireland’s most prolific and prestigious living writer
Broodingly striking in appearance – in a movie he would be the gangster with a kind heart – he is animated
gracious and gossipy in conversation: we are on a video call from Los Angeles
where he spends part of the year with his boyfriend
He is very much alive (he played tennis yesterday)
Meeting Tóibín in person (in more normal times) is to be struck by the disconnect between this ebullient
mournful fictional worlds for which he is famous
are as steeped in gentle misery as his native Wexford is in rain
“I’d love to have an integrated personality,” he once told a psychiatrist friend (he has a way of telling stories that sound like the beginning of a joke)
Tóibín said: “The books are so filled with melancholy and I wander about like some sort of party animal.” “Well
which would you like to be?” his friend asked
To which he replied “I don’t know.” “Oh go away!” the psychiatrist said
“I have serious patients with serious problems.”
For a man who can plough through a weighty biography in a day (preferably in a hammock in the California garden he shows off when he angles the computer) or turn out more than 20,000 words
one of the hardest things about his illness was that he was unable to read or write
This is something known only to “the chemo club”
“How could it be that you couldn’t even turn on Bach
Anywhere I’ve ever been there’s a poemThe steroids
during which “grinding time” he was able to write a couple of poems
He hadn’t seriously written poetry since his teens
a line would come to him out of the blue “like a melody”
The rest of the poem would materialise quite quickly and in the mornings he would get up and cut some lines
but the collection is not all about the motherland
which coincidentally was built on the site of the fictional house of Joyce’s Blooms
“How very strange to be in this space where Leopold and Molly once were,” he would muse in bed
He will be doing Ulysses when he returns to Columbia University
To finish The Magician he switched from his customary longhand to a computer
I needed to get the book done before a recurrence,” he says
Like The Master, Tóibín’s acclaimed 2004 novel about Henry James, The Magician is another portrait of a sexually repressed artist
“I don’t have a third,” he says of this trick of inhabiting the inner-worlds of great writers to explore his theme of creativity driven by thwarted desire
Both writers were hugely important to him during his late teens and early 20s
left him “fascinated by figures who had lived in the shadows erotically”
to the sense of James and Mann as being “like ghosts in certain rooms”
a distance created by their “uneasy homosexuality”
James’s work is filled with sexual secrets.”
View image in fullscreenSaoirse Ronan and Emory Cohen in the 2015 film adaptation of Tóibín’s novel Brooklyn Photograph: Lionsgate/AllstarTóibín’s life has parallels with both authors (he shares James’s unapologetic sociability)
who ends up in exile in LA; he even taught at Princeton
“You end up exploring the things that interest you,” Tóibín says
“Obviously there were things I had to imagine: the money and the power
the rise of Hitler.” Mann doesn’t emerge as an heroic figure either privately (he didn’t attend his son Klaus’ funeral because he was on a book tour) or as the most influential writer in Germany during the interwar years: a willingness to write morally ambiguous
complex or unlikeable characters is “essential” in fiction
From his first novel The South
he has returned repeatedly to the stretch of Wexford coast of his childhood
He would never have believed that this “very mild place
where in summer there is more drizzle than rain
more cloud than sun” could have provided him with “enough expression or felt life or drama” as the backdrop for so many novels
“Going back to it over and over has been rich and surprising.”
But, like so many of his Irish literary forebears, he also needs to escape; each novel he says, is a reaction against its predecessor. After his fourth, the Booker shortlisted The Blackwater Lightship
in which three generations of women and three gay men are stuck in a crumbling house on the coast for seven days – “there’s a lot of rain and a lot of making of tea and a lot of recriminations” – it was a relief to absorb himself in the sophisticated milieu of Henry James
more elaborate dialogue and to have a lot of duchesses”
because you want the reading process to be immersive in the same wayBut then he was done with duchesses and wanted to go back home
which returns to Enniscorthy and the lives of small-town Irish people
a book of yours we can finally read,” someone told him
an austerely moving fictionalisation of the aftermath of his father’s death
he felt “I never ever want to go back to that house again
I never want to go back into that sort of slow-burning grief.” And so it was a pleasure to turn to the cosmopolitan
“after writing another Irish novel in which no one has a penny.”
While he might be in sunny California right now
Another constant in his fiction is the longing for an absent mother (when his father was taken ill suddenly he didn’t see his mother for three months)
when the young Thomas is left alone for a year in Lubeck
“It won’t go away!” Tóibín whispers theatrically
complicated female characters – Eilis Lacey in Brooklyn
Nora Webster – to a childhood spent in a houseful of women
Also his fascination with the gaps between what is said and what is felt
On a good day, he will do nothing but write. “You need to immerse yourself in it, because you want the reading process to be immersive in the same way,” he says. “It is a question of being in your mental pyjamas all day.” He is back to writing by hand – holding a neatly written notebook with early pages of the new Brooklyn to the screen – making corrections and additions when he types it up.
Read more“What will happen if you get writer’s block?” a bank clerk once asked
‘Will you stop that nonsense!’ Writer’s block for God’s sake
It is one of those things that other people think writers have.”
Despite his prodigious output and boundless curiosity
that there are other people who are out there working really hard and that I’m not one of those people
writing is a form of self-erasure: “the page is not a mirror
“to hand over the feelings to the character and to make sure they are not yours
You are not here,” he says covering his face with his hands
except what’s blank and you have to fill it.”
This article was amended on 15 December 2021
not Princeton as stated in an earlier version
The Magician by Colm Tóibín is published by Viking (£18.99). To support the Guardian and Observer order your copy at guardianbookshop.com
surgical specialist who flew in from New Orleans Thursday afternoon
said the operation was a “complete success” and predicted a complete recovery for the diminutive golf champion
“He should recover from the effects of surgery within a week and be up and around in a few months,” the surgeon said
Hogan had been reported in serious condition most of the day Thursday
The doctor said he had made an incision in the golfer’s abdomen and tied off the vein through which the clots had appeared
The two clots which had endangered the golf star’s life had been absorbed by his system
Hogan was in the operating room about two hours
Royal Hogan would make no predictions concerning his brother’s release form the hospital
Hogan was given “a large transfusion” before submitting to surgery
Hogan was only slightly injured in the crash
Anxious friends of the golfing star kept Mrs
Hogan and Royal Hogan busy on the telephone much of the time Thursday
The callers included Golf Stars Jimmy Thompson
Here is a link to more Ben Hogan photos
This menu requires arrow keys to be able to use it. The menu has up to three levels:
Work is under way to draft a document for the protection of the traditional fabric and architectural heritage of these two parts of the city, the goal being to protect their unique character and identifying values.
The protection of heritage in these two neighbourhoods has so far been provided for in the plan for the protection of architectural, historical and artistic heritage in Sant Martí, approved in the year 2000, along with the plans for the rest of the city, and renewing the catalogue from 1979.
The aim of the new document will be to preserve the value and identity of these two spaces, bringing up to date the existing regulation which protects properties and buildings but which is mainly based on monumental criteria. The regulation will now include aspects relating to the character of the neighbourhoods, elements from their history, the urban landscape, historical memory and the environment.
Both neighbourhoods retain a clear coherence which has been affected by some actions and urban planning decisions. The drafting of this new plan will enable the two neighbourhoods to remain recognisable in the future.
The drafting of the document means that the issue of new building permits and major renovation permits in this area will be suspended for up to a year at most, to avoid any substantial changes in the two neighbourhoods.
but he remembers the Spanish Civil War vividly
A lifetime resident of Barcelona's El Clot neighborhood
he was only 3 when the conflict started and 5 when the Catalan capital became one of the first major cities in the world to suffer sustained 'carpet bombings' with the main purpose of instilling terror among civilians.
Bachs still resides in the very same apartment complex on Carrer Mallorca street that he lived in as a child with his family. "My father was drafted in 1938 and sent to the Ebre," he told Catalan News in a recent interview from his building's lobby
explaining that while he fought in the bloody southern Catalonia battle
and brother waited out the war in Barcelona.
"The buildings in front of ours didn't exist back then and you could see Carmel
where the antiaircraft defense was," he said of what today is known as the Carmel Bunkers on Turó de la Rovira hill
a popular viewpoint frequented by tourists and day drinkers
"From our window we could see them firing tracer bullets toward the sea."
But once the air raid sirens began ringing out
the closest bomb shelter was located right beneath them
"We'd play in the shelter's tunnels," he said
while adults "would talk about who had gotten a letter" from the front
boom' but when it was over you'd leave and that was it."
85 years after Barcelona's notorious 'carpet bombings'
but Bachs no longer goes down there - the stairs are far too hard on his 90-year-old frame.
"These shelters speak to the way Barcelona residents fought for survival and their values," Domènech said; most were built shortly after the war broke out in 1936, with a higher concentration of them in areas with strong neighborhood associations and community ties.
Tucked away from sight beneath the intersection of Barcelona's Mallorca, Biscaia, and Clot streets lies an underground maze of tunnels, some more spacious and well lit than others. Despite the passage of time, it remains in remarkable condition, closed off to the public who for the most part have no idea of its existence.
"Unfortunately, there are no longer many shelter children left," Ana Sánchez says. "Manel Bachs is a unique witness."
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Mar 29, 2024Al Roker is back at work and doing well over a year after his medical absence in 2022
The beloved weatherman returned to TV on Friday
after an extended absence for medical reasons beginning in fall 2022
Related: Get to Know Al Roker's Other Half Deborah Roberts
While Roker told his co-workers on the TODAY show that he's "got a number of issues," he shared
and every day I feel a little bit better."
Here is everything we know about Al Roker's health
that he had recently been admitted to the hospital "with a blood clot in my leg which sent some clots into my lungs."
In a post on Instagram he wrote, "After some medical whack-a-mole, I am so fortunate to be getting terrific medical care and on the way to recovery. Thanks for all the well wishes and prayers and hope to see you soon
Roker has shared just how many complicating factors were at play.
I had blood clots that they think came up after I had COVID in September and then I had this internal bleeding going on," he shared
They were trying to figure out where it was
Related: Al Roker's Best Grilling Tips
Roker was hospitalized for blood clots in November 2022
Roker was taken back to the hospital via ambulance the day after he was first released on Thanksgiving. One witness told the outlet
“Al was taken from his home in a stretcher back to the hospital on Friday
Roker had a clean bill of health and was back on TV
but he took another leave in May 2023 for a knee replacement
"Thank you all so much for being so concerned about him and so interested in his well-being" Rokers' wife Roberts said in a Sunday
"As many of you know he had a knee re-replacement
so a knee that had been replaced many many years ago had problems and had to be re-replaced. It makes it slow-going
so it's a little bit harder to snap back from but he's doing pretty well
Does Al Roker have blood clots?Roker was first admitted to the hospital in November 2022 with a blood clot in his leg
which he revealed sent "some clots" into his lungs
Related: TODAY Staff Surprises Al Roker As He Recovers at Home
Where is Al Roker on TODAY?Roker was absent from the NBC program due to his health scare in late 2022 and early January 2023
Speaking to his TODAY colleagues about why he hasn't come back to the show just yet
he said: "You lose a certain amount of muscle mass for every week you’re in the hospital
and I was in the hospital for four weeks."
"It’s just a certain amount of weakness
I’m doing physical therapy every day
I've got to just get my strength back."
but was absent for much of May following a knee replacement
"Al is chomping at the bit to try to get back to work, but the doctor just wants him to take it slowly so that he can continue to heal well," Roberts said on May 21, 2023. "So on Al's behalf and our family's behalf thank you so much and I'm sure he'll be popping up soon ..
He's trying to obey the doctor's orders so that he can get back to work and to play as soon as possible
so just wanted to give you a little update on him."
Where has Al Roker been?Roker was recovering at home from a knee replacement that he underwent in early May 2023
Roker told his colleagues, "This [knee replacement] is a little more complicated because it's what they call a revision—it was a replacement of a replacement
So we've just been kind of hanging out
From November 2022 to January 2023, Roker was recovering from blood clots at home. On Dec. 8, 2022, the weatherman announced that he was back at home following his second hospital stint.
@todayshow family and all your thoughts and prayers," he wrote on Instagram.
Is Al Roker sick?Roker is fully recovered after being hospitalized for blood clots in November 2022
he underwent a successful knee replacement surgery
In 2020, Roker revealed that he was battling prostate cancer and underwent surgery to have his prostate removed
that Roker's knee replacement surgery recovery went well
explaining that he was icing and elevating his knee and taking it easy
then would undergo several months of physical therapy
What type of knee replacement did Al Roker have?In May 2023
Roker underwent surgery to replace "a replacement" left knee
This is called a "knee revision" surgery
Because most knee replacements last 20 years
having had his first knee replacement in his 40s
Who operated on Al Roker's knee? David J. Mayman, MD, hip and knee surgeon at the Hospital for Special Surgery in New York City, performed Roker's knee revision surgery in 2023
a left knee replacement and a revision knee surgery for his left knee
Next, Find Out Which TODAY Host Was the Only One Who Went to Their High School Prom
GRAB AND GO A new medical device uses a catheter to deliver a wire mesh stent to snag and remove stroke-causing blood clots from inside brain arteries
GRAB AND GO A new medical device uses a catheter to deliver a wire mesh stent to snag and remove stroke-causing blood clots from inside brain arteries
By Nathan Seppa
doctors have begun treating strokes caused by blood clots in the brain by the most direct route imaginable — approaching the blockage from inside the artery
The concept is well-tested. Obstructed heart vessels are routinely opened with balloon-tipped catheters threaded up to the blockage. Attempts to clear obstructions in the brain have proved devilishly difficult, though (SN: 10/8/11, p. 14)
We summarize the week's scientific breakthroughs every Thursday
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a string of successes using a new device made just for the brain has rendered clot extraction a reality
Five studies all show that people in the throes of a major clot-based stroke are better off getting the clot removed by a stent-tipped catheter plus standard care than by getting standard care alone
Four trials were stopped early because the device’s benefit was indisputable
“This is a once-in-a-generation change in acute stroke care,” says neurologist Jeffrey Saver
director of the UCLA Stroke Center in Los Angeles
“It’s been about 20 years since the last stroke therapy — tPA — came along,” he says
It’s a clot-dissolving drug given intravenously to some stroke patients
But while dissolving a clot with tPA is less invasive than extracting it with a mechanical device
tPA clears obstructions from only about one-third of jammed cerebral arteries
“A retrievable stent can open up 80 to 90 percent of them,” says Saver
who coauthored one of the clot extraction trials
Clots in major arteries of the brain can cause disabling strokes
This illustration depicts how an obstruction can starve a part of the brain (shaded area) by shutting off its blood flow
will expand the number of stroke patients who are treatable
a neurologist and emergency medicine doctor at the University of Calgary in Canada
the clot retriever might extend the crucial time window after stroke onset in which treatment can be performed in some patients without risk of doing more harm than good
all published in the New England Journal of Medicine this year
included patients who had a large blood clot in a major cerebral artery
roughly 800,000 people in the United States have a stroke
a neurologist and acting director of the National Institute of Neurological Disorders and Stroke in Bethesda
This is what fills up nursing homes and care centers,” he says
“These strokes rob people of their personality and ability to function.”
Antibodies that bind to a protein called platelet factor 4 may be behind rare
blood clots (one illustrated) that develop in some people vaccinated with AstraZeneca’s or Johnson & Johnson’s COVID-19 vaccines
A new survey describes a range of neurological and psychiatric symptoms in patients hospitalized with COVID-19 (general brain MRI images shown)
health officials stopped administering the Johnson & Johnson COVID-19 vaccine at federal vaccination sites
after reports that six out of 6.8 million people developed deadly blood clots
Patients in these trials were randomly assigned to get the clot extracted or to get tPA or
a doctor inserts a catheter into a large artery in the groin then threads it up to the brain
a wire inside of it tunnels through the obstruction
The doctor withdraws the wire and replaces it with the stent-retriever device
restoring blood flow that rescues the starving brain cells downstream that have not yet died
60 percent of patients getting the extraction procedure were functionally independent compared with 35 percent getting just tPA
“I think this is the biggest thing to ever happen
because you can really take somebody who’s going to have a horrible outcome and save them.”
The clock starts ticking the moment a blood clot lodges in a major brain artery
about 2 million neurons die on average each minute until blood flow is restored
“The biological imperative is speed.” Stroke patients routinely undergo a quick CT scan at a hospital or stroke center to discern whether they have a bleeding or clot-based stroke
Patients with clots who qualify are given tPA
with high blood pressure or certain other conditions can’t receive it
the drug fails to dissolve big clots most of the time
The shortcomings of tPA spurred research into mechanical extraction devices (SN: 2/17/07, p. 99)
But brain arteries are curvy and fragile compared with heart vessels
and merely inserting a device into the brain risks collateral damage
patients treated with older-generation brain-clot retrievers and tPA fared no better than those just getting tPA
Stroke patients randomly assigned to get a clot removal procedure in addition to a standard clot-dissolving drug (tPA) did better three months later than those treated with the drug alone
But testing was already under way for the new stent-retriever device
a pharmaceutical company acquired this year by Minneapolis-based Medtronic
The results now show that the device safely removes brain clots
Not all patients in the recent studies recovered fully after clot extraction
probably because the brain had sustained too much damage before blood flow was restored
the high-tech advance arrives at a good time
and emergency departments and stroke centers have become more efficient in promptly moving patients from scanning rooms to an angiography lab for catheter insertion
the time window for treating strokes with tPA has been up to 3 to 4½ hours
With more accurate brain imaging and the availability of clot retraction
the window could now widen in people who have a slow rate of tissue loss
“Our study showed a benefit through six hours” with retraction
Bits of clot drifting downstream can block smaller arteries
are likely to come out soon governing stent retrieval
The new results will probably require some regional hospitals in rural areas to add doctors or other staff trained in the new technology
One curious finding that begs for more research also emerged from these studies
Patients might do well to be conscious during clot retrieval
a neurologist at the University of Pittsburgh who coauthored three of the five stroke papers
“but the outcomes were dramatically better with the patient awake.”
COME AND GET IT The clot-retrieving device called Solitaire can extract clots from delicate
a tubelike catheter and wire are inserted into a large artery in the groin and threaded up to the brain
The wire pokes through the obstructing blood clot as a guide for the catheter
Then the wire is retracted and replaced by the clot-removing device
allowing the spring-loaded device to pop open and snatch the clot
The retriever and clot then get reeled back to the catheter
Questions or comments on this article? E-mail us at feedback@sciencenews.org | Reprints FAQ
A version of this article appears in the June 13, 2015 issue of Science News
T.G. Jovin et al. Thrombectomy within 8 hours after symptom onset in ischemic stroke
J.L. Saver et al. Stent-retriever thrombectomy after intravenous t-PA vs. t-PA alone in stroke
To build immunity to bites from venomous snakes like this water cobra
Tim Friede injected himself with doses of venom over time
The diabetes and weight loss drug semaglutide may also help people with a severe form of fatty liver disease called MASH
In cities that have stopped adding fluoride to drinking water
Vials of milk await testing for avian influenza at Cornell University in Ithaca
Infecting dairy cattle hasn’t yet given H5N1 bird flu an evolutionary boost toward easy person-to-person spread
More children than ever before were diagnosed with autism in 2022
Experts say most of the rise is because of better detection and increased awareness of the developmental condition
NIH suspended funding for two clinical trials investigating how to better protect organ transplant recipients from COVID-19
The money is needed to complete the data analyses
Researchers are investigating whether a drug used for heavy metal poisoning might prevent harm to people from the venom of the puff adder
The snakes’ venom contains proteins that need zinc to do their damaging work
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tree-lined boulevard that runs through the neighborhood of the same name
groups of friends and chummy neighbors who have been seduced by the peaceful village atmosphere and the proximity of the beach
recently opened on the ground floor of an old house – formerly a traditional bodega that sold bulk wine
and now one of the most delightful tapas bars in the area
met while working together at Hotel Diagonal 00 in Barcelona
the former as lodging director and the latter as the executive chef
When Misan was looking to start his own personal project
with all his professional cooking experience (such as at Dos with the Torres twins
the perfect partner to join him on this adventure
Misan has lived in El Clot and Poblenou for 16 years and knew it was the right location for the kind of place he wanted to open: a casual spot with excellent
uncomplicated food served in a warm atmosphere and at gentle prices (the menu del día is just €10)
Misan has decorated El 58 with comics and art
The sock-monkey-like stuffed red dolls – all named Quim – hanging from the walls and flying through the space were made by architect and artist Aleix Antillach
The usual scene here includes kids playing
and friends holding forth while clutching refreshing gin and tonics in the backyard (a glorious setting on fine spring days)
Drinkers can refresh their vermuts with the old-school soda siphons that can be found throughout the bar
Martínez has created a mix of traditional and contemporary tapas and platillos (little dishes to share
not strictly tapas) with some international touches (French and Asian
There are more than 30 different tapas listed on the blackboard
it’s clear that Martínez knows how to combine ingredients in ways that are not only felicitous but also surprising (in a good way
of course) and that he knows how to highlight the best qualities of each ingredient he uses
The menu changes according to season – and sometimes the weather
the traditional winter stews of butifarra and chickpeas have made way for lighter fare
Popular tapas include the salmon mini burgers
marinated fried chicken with wasabi-honey mayonnaise and the terrific patatas bravas
inspired by those of renowned restaurant Bohemic
made with a caramelized-garlic mayonnaise and another sauce of dried tomato
We also love the Andalusian-style eggplant
fried and perfumed with honey and rosemary – it’s a dish that transports us straight to the Mediterranean
Fish and seafood hold a prominent place on the menu
as should be the case in a restaurant so close to the beach
Martínez serves Japanese-inspired sashimi – silken slices of tuna
salmon and scallop – as well as salmon tataki and a delicate cod carpaccio pointed up by olives
which he marinates and fries to just the right tenderness and spices with cumin
a touch of smoked paprika and other spices
We’ve only just scratched the surface on Martínez’s long list of tapas
and we look forward to returning to see what else he has cooking – as well as to soak up some sun in the backyard
Editor’s note: To celebrate the our 2019 neighborhood guide
we will be republishing dispatches from the less-visited areas – like Poblenou – that our correspondents are planning to explore this year
The Catalan railway operator Ferrocarrils de la Generalitat de Catalunya (FGC) is preparing to launch a new express train service connecting central Barcelona with Barcelona-El Prat Airport in 2026
The company gave a presentation at the Tomorrow Mobility World Congress and released details of the new trains
which Alstom and Stadler are currently manufacturing
At the Tomorrow Mobility World Congress
confirmed that testing will begin in late 2025
Alstom is building the ten airport trains in its factory in Vallès Occidental
sturdier and wider” than FGC’s existing models
According to the press release
each train will have five cars with 20 doors (10 on each side) and a capacity of 656 passengers
The doors will have red and green lights indicating closure and opening to aid passengers with hearing impairments
the trains will feature 20 panoramic screens displaying train information and nine panoramic screens with information about airport arrivals and departures
There will also be ample storage space for luggage
12 LED screens will display information to passengers on the platforms
with no steps between the platform and the train car and automatic ramps at the doors close to the areas designated for passengers with reduced mobility
Each train will have two spaces reserved for people with reduced mobility and two multifunctional spaces for bicycles
after renovating the existing infrastructure currently operated by Rodalies
is expected to open in 2026 and will run every 15 minutes
It will cover the distance between Passeig de Gràcia station and Terminal 1 in less than 20 minutes
The 22.7 km line will have nine stations: Sant Andreu
FGC also announced plans to operate a new service between Lleida and Manresa starting at the end of 2025
This 120 km line will see 12 daily departures in each direction between Lleida and Cervera
with five of these trains continuing to Manresa
Stadler is currently building four three-car electric trains for the Lleida-Manresa service
They will feature similar accessibility and passenger information systems to the airport trains
FGC plans to hire 70 new train drivers to staff the new services
The cost of the ten airport trains is €107 million
with an additional €50.9 million for 15 years of maintenance and €19.5 million for constructing a maintenance workshop
The four Lleida-Manresa trains will cost €44 million
with maintenance costs over 15 years totaling €21.2 million
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Jordan Feldstein — who was also Maroon 5's manager — died at age 40 last December
Metrics details
Despite increased atherothrombotic risk in type 2 diabetes mellitus
(T2DM) the best preventative antithrombotic strategy remains undetermined
We defined the effects of three antiplatelet agents on functional readout and biomarker kinetics in platelet activation and coagulation in patients with T2DM
56 patients with T2DM were randomised to antiplatelet monotherapy with aspirin 75 mg once daily (OD)
clopidogrel 75 mg OD or prasugrel 10 mg OD during three periods of a crossover study
Platelet aggregation (PA) was determined by light-transmittance aggregometry and P-selectin expression by flow cytometry
inflammation and coagulation were measured
Plasma levels of 14 miRNA were assessed by quantitative polymerase chain reactions
24 (43%) were receiving aspirin for primary prevention of ischaemic events and 32 (57%) for secondary prevention
Prasugrel was the strongest inhibitor of ADP-induced PA (mean ± SD maximum response to 20μmol/L ADP 77.6 ± 8.4% [aspirin] vs
P-selectin expression (30 μmol/L ADP; 45.1 ± 21.4% vs
p < 0.001) and collagen-induced PA (2 μg/mL; 62.1 ± 19.4% vs
Fibrin clot dynamics and levels of coagulation and inflammatory proteins were similar
miR-197 (p = 0.009) and miR-223 (p = 0.014) were demonstrated during prasugrel-therapy vs
Circulating miR-197 was lower in those cardiovascular disease during therapy with aspirin (p = 0.039) or prasugrel (p = 0.0083)
Prasugrel monotherapy in T2DM provided potent platelet inhibition and reduced levels of a number of platelet-associated miRNAs
miR-197 is a potential marker of cardiovascular disease in this population
Clinical outcome studies investigating prasugrel monotherapy are warranted in individuals with T2DM
Trial registration EudraCT, 2009-011907-22. Registered 15 March 2010, https://www.clinicaltrialsregister.eu/ctr-search/trial/2009-011907-22/GB
prasugrel as SAPT has not been well studied and data on patients with T2DM are scarce
Prasugrel monotherapy in individuals with T2DM may offer superior anti-thrombotic properties compared with aspirin or clopidogrel
The aim of this study was to comprehensively characterise and compare the effects of the three drugs on platelet function
inflammation and expression of miRNAs in a cohort of T2DM patients
Venous blood samples were collected by venepuncture
and anticoagulated with trisodium citrate dihydrate 3.13%
Platelet-rich plasma was prepared by centrifugation for 10 min at 200×g and platelet-poor plasma was prepared by further centrifugation for 10 min at 1500×g
All analyses described below were undertaken by individuals blinded to the sample details and type of antiplatelet treatment
Maximum (MA) and final (FA) aggregation responses at 6 min after agonist injection
and repeated if a discrepancy of > 10% was observed between the readings
citrated platelet-poor plasma samples were mixed with standard lysis and activation mixes to form acellular clots
Serial absorbance was measured using an automated plate reader during clot formation until lysis was achieved
representing the period from the addition of clot activation mix to the start of clot formation (a measure of clotting tendency)
a representation of fibre thickness and clot density)
and lysis time (time from full clot formation to 50% lysis
Total RNA was isolated using the miRNeasy Mini kit (Qiagen
100 µL of plasma were combined with 694.75 µL of QIAzol
4 µL of diluted Caenorhabditis elegans miR-39-3p (cel-miR-39) spike-in and 1.25 µL carrier MS2
Following a brief incubation at ambient temperature
140 µL of chloroform were added and the solution was mixed vigorously
Samples were then centrifuged at 13,500 relative centrifugal force (rcf) for 15 min at 4 °C
The upper aqueous phase was carefully transferred to a new tube and 1.5 volumes of ethanol were added
The samples were then applied directly to columns and washed according to the company’s protocol
Total RNA was eluted with 35 µL of nuclease-free water
A fixed volume of 3 μL of the 35μL RNA eluate was used as input for reverse transcription (RT) reactions
MiRNAs were reverse-transcribed using Megaplex RT Primer Pools (Human Pool A version 2.1; Life Technologies
Germany) and the TaqMan MicroRNA RT kit (Life Technologies
Germany) according to the manufacturer’s instructions
Templates were pre-amplified using Megaplex PreAmp Primers (Primers A version 2.1) and PreAmp Mastermix (Life Technologies) with 12 cycles of 95 °C for 15 s and 60 °C for 4 min
Pre-amplification product was 72 times diluted and 2.25 μL were combined with 0.25 μL TaqMan microRNA assay (20×) (Life Technologies) and 2.5 μL TaqMan Universal PCR Master Mix No AmpErase UNG (2×) to a final volume of 5 μL
RT-qPCR was performed on an Applied Biosystems Viia 7 thermocycler at 95 °C for 10 min
followed by 40 cycles of 95 °C for 15 s and 60 °C for 1 min
Clinical data were blinded to laboratory personnel
The three treatments were compared by repeated measures ANOVA with Greenhouse–Geisser correction
The primary endpoints of the study were platelet aggregation responses to ADP
collagen and AA; platelet P-selectin expression and fibrin clot dynamics
For variables with a significant difference (p < 0.05) between the treatments
pairwise comparisons were performed using Bonferroni correction
SPSS statistics v25 (IBM software) was used for these analyses and graphical representations generated using GraphPad PRISM v7
Correlation and subgroup analyses were performed using RStudio v1.1.456: adjustment for multiple comparisons was not made for these as they were exploratory and intended for hypothesis generation
A total of 56 patients were needed to detect a 10% difference in platelet aggregation response to various agonists comparing the different therapies at p < 0.05 and 90% power
based on the assumption that the common standard deviation of the response variable is 16%
The study also had the power to detect a 7% difference in clot final turbidity based on the assumption that standard deviation for the response variable is 11% (p < 0.05
Of 310 patients who were approached, 64 were enrolled and 56 completed the study (Additional file 1: Figure S1). Baseline characteristics are shown in Table 1
a Maximum platelet aggregation responses assessed by light transmittance aggregometry
AA arachidonic acid; b proportions of participants during each treatment period with high (HRPR) and low residual platelet reactivity (LRPR)
defined as a maximum aggregation response to 20 μmol/L ADP of > 59% and ≤ 59% respectively
Comparing platelet aggregation responses when receiving standard-of-care aspirin 75 mg OD to those at the end of the study aspirin period, there were no differences (Additional file 1: Table S1)
Platelet P-selectin expression in response to stimulation with ADP at concentrations of 0.3
No significant differences in fibrinogen, circulating leukocyte count, CRP or complement C3 were observed between the treatments (all p > 0.05, Table 2)
Quantification of plasma levels of miR-21, miR-24, miR-126, miR-191, miR-197 and miR-223 using the 2−ΔΔcq method, expressed relative to the mean value when receiving aspirin
Correlation between platelet P-selectin expression
Dark blue lines indicate those of best linear fit
light blue shading indicates 95% confidence interval
R and p values were produced by Pearson correlation analysis
Relative quantification of circulating miR-197 in participants with and without a history of cardiovascular disease during the three treatment periods
In concert with this was the fact that there was a large reduction in the proportion of patients with HRPR when receiving clopidogrel vs
P-selectin expression after stimulation with ADP followed a similar pattern to the aggregation responses
perhaps representing the best global assessment of effects on platelet macroaggregation
was more strongly inhibited by prasugrel than aspirin and clopidogrel
suggesting that prasugrel acts as the most potent antiplatelet drug of the three when used as monotherapy in patients with T2DM
supports the association between plasma levels of these miRNAs and platelet function
This has not been reported before in individuals with diabetes receiving antiplatelet therapy and future research is required to understand the specific role of each of the miRNAs
which may help with risk stratification and/or uncover alternative therapeutic targets to control platelet activation in this population
our data suggest that prasugrel monotherapy is superior to either aspirin or clopidogrel in inhibiting platelet function in diabetes
From a translational perspective these findings could have the potential to be implemented in personalised treatment options for patients with T2DM and cardiovascular disease
our miRNA results indicate that assessing response to antiplatelet therapy does not necessarily require fresh blood samples and tests can be conducted on miRNA measurements as biomarkers from stored acellular plasma samples
miRNA measurements may provide a platform to identify patients at greater risk of ischaemic heart disease relating to their platelet function
Based on these data and acknowledging that platelet activation is the central process in the development of atherothrombosis
a trial assessing the effects on clinical outcomes of prasugrel monotherapy may be warranted for the primary or secondary prevention of ischaemic heart disease in patients with T2DM
further analysing the role of miRNA in predicting vascular outcome in individuals with diabetes may offer a tool to measure the clinical efficacy of antiplatelet agents
All data generated or analysed during this study are included in this published article and its Additional file 1
clopidogrel vs aspirin in patients at risk of ischaemic events
high on-treatment residual platelet reactivity
P2Y purinoceptor type 12 (platelet adenosine diphosphate receptor)
reverse transcription quantitative polymerase chain reaction
Global burden of thrombosis: epidemiologic aspects
Diagnosis and management of the metabolic syndrome: an American Heart Association/National Heart
Hypofibrinolysis in diabetes: a therapeutic target for the reduction of cardiovascular risk
Diabetes and antiplatelet therapy: from bench to bedside
Long-term antiplatelet therapy following myocardial infarction: implications of PEGASUS-TIMI 54
Effects of clopidogrel in addition to aspirin in patients with acute coronary syndromes without ST-segment elevation
Prasugrel versus clopidogrel in patients with acute coronary syndromes
Greater clinical benefit of more intensive oral antiplatelet therapy with prasugrel in patients with diabetes mellitus in the trial to assess improvement in therapeutic outcomes by optimizing platelet inhibition with prasugrel-thrombolysis in myocardial infarction 38
trial of clopidogrel versus aspirin in patients at risk of ischaemic events (CAPRIE)
Amplified benefit of clopidogrel versus aspirin in patients with diabetes mellitus
The prevention of progression of arterial disease and diabetes (POPADAD) trial: factorial randomised placebo controlled trial of aspirin and antioxidants in patients with diabetes and asymptomatic peripheral arterial disease
Aspirin for primary prevention of cardiovascular events in people with diabetes: a position statement of the american diabetes association
a scientific statement of the american heart association
and an expert consensus document of the American College of Cardiology Foundation
Low-dose aspirin for primary prevention of atherosclerotic events in patients with type 2 diabetes: a randomized controlled trial
Low-dose aspirin for primary prevention of cardiovascular events in Japanese patients 60 years or older with atherosclerotic risk factors: a randomized clinical trial
Effects of aspirin for primary prevention in persons with diabetes mellitus
Effect of CYP2C19 and ABCB1 single nucleotide polymorphisms on outcomes of treatment with ticagrelor versus clopidogrel for acute coronary syndromes: a genetic substudy of the PLATO trial
Genetic variants in ABCB1 and CYP2C19 and cardiovascular outcomes after treatment with clopidogrel and prasugrel in the TRITON-TIMI 38 trial: a pharmacogenetic analysis
Platelet P2Y12 inhibitors reduce systemic inflammation and its prothrombotic effects in an experimental human model
A randomised trial on the effect of anti-platelet therapy on the systemic inflammatory response in human endotoxaemia
Effects of low-dose aspirin on acute inflammatory responses in humans
MicroRNAs within the continuum of postgenomics biomarker discovery
Circulating MicroRNAs as novel biomarkers for platelet activation
Association of MicroRNAs and YRNAs with platelet function
Prospective study on circulating MicroRNAs and risk of myocardial infarction
Inhibition of platelet aggregation by AZD6140
a reversible oral P2Y12 receptor antagonist
compared with clopidogrel in patients with acute coronary syndromes
Inhibition of ADP-induced P-selectin expression and platelet-leukocyte conjugate formation by clopidogrel and the P2Y12 receptor antagonist AR-C69931MX but not aspirin
Fibrin clot structure and platelet aggregation in patients with aspirin treatment failure
Effects of dabigatran on the cellular and protein phase of coagulation in patients with coronary artery disease on dual antiplatelet therapy with aspirin and clopidogrel
Raised plasma fibrinogen concentration in patients with abdominal aortic aneurysm
Analysis of relative gene expression data using real-time quantitative PCR and the 2(-Delta Delta C(T)) Method
Platelet Inhibition with Ticagrelor 60 mg Compared with 90 mg Twice-daily in the PEGASUS-TIMI 54 study
Impact of platelet reactivity on cardiovascular outcomes in patients with type 2 diabetes mellitus and coronary artery disease
Consensus and future directions on the definition of high on-treatment platelet reactivity to adenosine diphosphate
Plasma microRNA profiling reveals loss of endothelial MiR-126 and other MicroRNAs in type 2 diabetes
Aspirin has potential benefits for primary prevention of cardiovascular outcomes in diabetes: updated literature-based and individual participant data meta-analyses of randomized controlled trials
Cardiovascular Disease and Risk Management: Standards of Medical Care in Diabetes-2019
2019 ACC/AHA Guideline on the Primary Prevention of Cardiovascular Disease: a Report of the American College of Cardiology/American Heart Association Task Force on Clinical Practice Guidelines
Antiplatelet effect of aspirin during 24 h in patients with type 2 diabetes without cardiovascular disease
Evolving pattern of platelet P2Y12 inhibition in patients with acute coronary syndromes
Ticagrelor improves blood viscosity-dependent microcirculatory flow in patients with lower extremity arterial disease: the Hema-kinesis clinical trial
Efficacy and safety of ticagrelor in comparison to clopidogrel in elderly patients with ST-segment-elevation myocardial infarctions
Safety and efficacy of low-dose prasugrel as part of triple therapy with aspirin and oral anticoagulants in patients with atrial fibrillation undergoing percutaneous coronary intervention-from the TWMU-AF PCI registry
Platelet function during extended prasugrel and clopidogrel therapy for patients with ACS treated without revascularization: the TRILOGY ACS platelet function substudy
A comparison of prasugrel and clopidogrel loading doses on platelet function: magnitude of platelet inhibition is related to active metabolite formation
VAMP8/endobrevin is overexpressed in hyperreactive human platelets: suggested role for platelet microRNA
miRNA-197 and miRNA-223 predict cardiovascular death in a cohort of patients with symptomatic coronary artery disease
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Parker is funded by a British Heart Foundation Clinical Training Research Fellowship (FS/18/49/33752)
Schulte is the recipient of a research fellowship by the Deutsche Forschungsgemeinschaft (DFG) (SCHU 2983/1-1)
Barwari is funded by a British Heart Foundation (BHF) Interdisciplinary Ph.D
Mayr is a BHF Chair Holder (CH/16/3/32406) with BHF programme Grant support (RG/16/14/32397)
This study was funded by Eli Lilly through an investigator-led grant
Eli Lilly was not involved in the design of the study; collection
analysis or interpretation of data; writing the report; or the decision to submit the report for publication
Department of General and Interventional Cardiology
Leeds Institute of Cardiovascular and Metabolic Medicine
The study was conceived and supervised by RAA
MM and TB designed and oversaw the microRNA analysis
SMP and RAA recruited patients and obtained study samples
collated results and produced the first draft of the manuscript
All authors read and approved the final manuscript
The study was approved by NHS Research Ethics Service (reference 09/H1307/110)
Written consent was obtained from participants before any study activities took place
M Mayr filed and licensed patent applications on miRNAs as biomarkers (EP15193448.6
Mayr filed and licensed patent applications on miRNAs as biomarkers (EP15193448.6
RF Storey reports institutional research grants/support from AstraZeneca and GlyCardial Diagnostics; consultancy fees from Amgen
Portola and Thromboserin; and honoraria from AstraZeneca
received honoraria and educational and research support from Abbott Diabetes Care
The other authors report no relevant disclosures
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DOI: https://doi.org/10.1186/s12933-019-0981-3
Unofficial weather station at 2,300 meters above sea level in a mountain hollow amid Storm Filomena, which might carry heavy snowfall
It is not in Siberia, the Mount Everest or the Arctic Circle. El Clot del Tuc de la Llança is a mountain hollow in the Catalan Pyrenees, and on Wednesday it registered a surreal temperature: -34.1ºC. Beyond cold, beyond freezing.
An unofficial weather station owned by Baqueira Beret ski resort in the site hit the lowest value ever recorded in the Iberian Peninsula at 5.19 am local time – lower than the previous all-time low, of -32ºC in 1956 in Estany Gento, not very far in the same mountain range.
The record, pending official evaluation, was registered in a station managed by Meteo Pirineu organization at 2,300 meters above sea level.
Despite being unofficial, the Alt Pirineu natural park has shared the details of the record, saying that the station is "very reliable."
It is an uninhabited area, so nobody had to bear this insanely freezing temperature.
The temperature dropped by around 20 degrees in around four hours, a phenomenon which is called cold air pool.
Sergi González, a researcher at Aemet, Spain's meteo agency, said on Twitter that "this phenomenon happened with clear sky and calm winds, which favored the cooling of the nearby air in the surface of mountain slopes."
"Cold air weighs more and due to gravity it has gone down to the deepest areas. In Clot this cold air has piled up," he added.
The figure came amid especially cold days across the country – this usual weather is due to a storm called Filomena, which might carry a heavy snowfall between Thursday and Saturday in large parts of Catalonia. Some snowflakes have already been noticed at sea level, and more snow near the coast might follow.
The Catalan meteo service has issued an alert for snow for Thursday affecting a dozen counties in the southwest, in the Ebre, Tarragona and Lleida areas – for Friday, some more unusual snow might fall in the river Ebre area.
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Painting by Jorge Rodríguez Gerada on the Sant Martí Civic Centre.Photo: Vicente Zambrano
The legacy of Barcelona’s artists, some of whom have achieved wide renown, has been enriched by contributions from high profile artists from around the world.
The great boom that Barcelona experienced around the year 2000 as a centre for urban art has left a legacy of artists that started out in this scene and have now achieved widespread recognition. Maybe the grand old man of graffiti art is Xupet Negre, who has been painting on Barcelona’s walls and furniture since 1989. His emblem, a black baby’s dummy often surrounded by pacifist symbols and words, is one of the images that we can most frequently find as we walk around the city.
The spirit of the mountain, by Sixe Paredes, on a wall of Lepant Street, 424.Photo: Vicente Zambrano
Mural of El Pez in the street of Creu Coberta, in the district of Sants.Photo: Vicente Zambrano
Another major figure is El Pez, creator of the style that he himself christened the “Barcelona Happy Style”. Clearly influenced by his origins in graffiti, his pieces are full of colour and always feature his symbol, a fish with an enormous smile. In Barcelona, some of his pieces can be seen in La Escocesa and in Sant Adrià del Besòs. If you are lucky, you might even see a lorry decorated by him driving around the city.
The shark painted by Blu in Carmel, with hundred euro notes for scales, is one of the oldest murals in the city.Photo: Vicente Zambrano
Tribute to Carmen Amaya by Btoy and Uriginal in Clot park.Photo: Vicente Zambrano
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The first kiosks were built in Barcelona in the mid-19th century, either to sell products or shelter musical performances. However, the first newspaper kiosk was the initiative of an evening paper born in 1888: El Noticiero Universal. From La Rambla, newspaper kiosks spread throughout the city.
The last few years haven’t been kind to sellers of printed press. Over the course of a decade, 35% of kiosks in Barcelona have closed. The recession –and, above all, new ways of getting information– are causing many to shut down. Aware of the problem, the sector and the administration are taking on a necessary reconversion.
There are about 50 interior gardens open to the public in the Eixample. And in each block interior we find this reduced microcosm, each with its own particularities and features. But they all have certain things in common: spaces for leisure use, their imitation of nature and their perceptual isolation, which facilitates neighbourhood socialising.
Climate change and air pollution have driven the world’s great cities towards a change in paradigm. After a century of cars ruling the streets, the largest metropolises are starting to restrict their use.
Officially, science was a man’s affair in Barcelona until very recently. This can be seen, for example, in the gallery of names of illustrious academics in the Paranimf of the University of Barcelona, which only includes one woman: 17th-century philosopher Juliana Morell. However, if we look under the surface, we find that women have in fact been involved in the scientific and technical life of the city in many different ways.
From the 70´s, the historical establishments – neighbourhood cinemas and other, classier, first - run downtown cinemas – came up time and again against the challenge of survival. Throughout this struggle, and over and above the overpowering creeping commercialism, alternative circuits have been established that have allowed new experiences for cinema-lovers while preserving the best of the traditional ones.
In Catalonia, 7% of all food purchased by families, restaurants and shops each year is wasted. Food waste is a global problem which can be fought by means of better laws and social projects, in addition to individual and household initiatives.
The Model prison has since been emptied of its prisoners. Now, for the residents in this part of the city, it represents both an opportunity and a danger, as they watch to see what sort of restoration will be given to this large chunk of their neighbourhood, following four decades of calls for the prison’s closure in order to make way for amenities, green spaces and schools.
"We've had brunch every day since we arrived in Barcelona," says an American tourist savoring a French toast with scrambled eggs at one of the Catalan capital's pioneering brunch spots.
thousands of tourists flock daily to the Catalan capital's thriving brunch scene
especially in the city's central tourist areas.
Tourism is a major driver of this trend. In 2023, Barcelona welcomed nearly 16 million international visitors
According to Google Maps data analyzed by Catalan News
Barcelona has more than 180 places that offer brunch
includes specialized brunch spots as well as general cafes
bakeries and restaurants with broader menus that offer brunch options.
such as those near the Sagrada Familia and the Gothic Quarter
have also become hotspots for brunch lovers.
The location of most brunch spots in Barcelona suggests that brunch is largely a tourist-driven phenomenon rather than a local tradition
Even the expat community - often cited as another factor behind the rise of brunch spots - seems to play a secondary role compared to the overwhelming influence of tourism
"Brunch is a little more unusual in the local culture
so we see more international customers than locals
it's mostly travelers," says Billy Thorens
one of the city's most popular brunch destinations
Thorens opened Billy Brunch in 2018 as one of the first dedicated brunch venues in the Eixample district
the business has expanded to six locations across the city
The Swiss entrepreneur attributes his decision to open the restaurant to a combination of business opportunity
Barcelona's favorable weather and high quality of life
"I chose Eixample for its proximity to everything
The Sagrada Família brings people year-round," he explains
have spurred the rise of increasingly extravagant brunch venues
often adorned with pink floral decor and elaborate design elements
The menu at Billy Brunch continues to focus on traditional fare
with good eggs and good coffee in a pleasant atmosphere," Thorens describes
"There is a demand for fanciness - it works with TikTok
but our traditional brunch will last forever," he adds
the charm of Billy Brunch resonates on social media as well
tourists from the United States enjoying a meal there
told us that social media led them to the spot
the exterior was really aesthetic," they say
Talking to several customers who enjoy brunch at Billy Brunch
it is clear that the main draws are the healthy
protein-rich food - especially the eggs - and the inviting atmosphere
but they're not necessarily looking for a heavy meal with wine," Billy explains
"They want a place where they can socialize in a healthy environment with a lot of variety
Despite the increase in brunch spots, the locals have not followed suit. In fact, some have taken an initiative to reclaim the traditional Catalan equivalent of brunch, the 'esmorzar de forquilla,' or fork breakfast.
"We're not coming to take away the local culture. If you come to Billy Brunch and ask for 'pa am tomaquet' or a simple 'tortilla', you will get it. We understand Catalan and everyone is welcome," says Billy, encouraging locals to try brunch.
To learn more about Barcelona's brunch scene and its local equivalent, the esmorzar de forquilla, listen to this episode of our podcast Filling the Sink.