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his dad took him to all the nearest air shows so he could see all the planes. And when he learned to drive
he joked with his parents that he shouldn’t drive near the airport because he would get distracted
He always looks up at the sky when he hears airplanes pass.
“I can't even tell you the first time I got interested in airplanes,” he says
Caldelas is an MIT senior majoring in aeronautics and astronautics
but he came into the university thinking he’d go into nuclear science and engineering. He used to think of his love of flying as a hobby but not a profession — that is
until his friends convinced him to take a tour of the MIT’s Department of Aeronautics and Astronautics (AeroAstro)
he learned of a semiserious requirement for every professor candidate
the candidate is taken outside; if a plane flies overhead and the candidate doesn’t look up
he knew AeroAstro would be his home.
‘If that's the passion here in the department
then that's where I should be.’ And I haven't regretted that decision since,” he says
It feels like a home just because I can nerd out with people about all the airplane and space things.”
Caldelas has focused on both air and space travel
and hopes his career will go in both directions
Caldelas has been involved with the Reserve Officers’ Training Corps (ROTC) during his four years at MIT and after graduation will join the Navy as a naval aviator
After serving for his country and working with airplanes
Caldelas is the kind of person to arrive at the airport well before his flight
he loves sitting in a seat where he can look out the window and watch the engine function.
“There's a quote that goes ‘with understanding comes appreciation
and with appreciation comes respect.’ So after studying how a jet engine works
it makes [an airplane] even more incredible.”
The aeronautics part of his MIT education gave Caldelas a background on the theory and mechanics of airplane flight
and tested equipment through wind tunnels.
gaining hands-on experience with the 737 and P-8A Poseidon aircraft
He also got to see how understanding the mechanics of an airplane will help him when he is a pilot.
when they were testing some iterations of the new 777X
one of the test pilots — who had both flying experience and and understood what was going on inside the plane — easily identified an issue with the plane because she was in tune with how an airplane is constructed
he wants to commission as an officer in the Navy and be a fighter pilot
He flew an airplane for the first time and has never gotten over that thrill
he’s been involved with Naval ROTC and often wears the classic “summer whites” uniform with the gold buttons; this semester
Caldelas says test pilots know how to fly and have a technical understanding of airplanes
which helps them communicate with the engineers on what they need to tweak
The AeroAstro hallway displays photos of many illustrious alumni of the department
including a number of astronauts — a group Caldelas ultimately hopes to join
His fascination with astronauts began early: When he was 4 years old
his family went to NASA’s Kennedy Space Center.
The admiration with astronauts skyrocketed as he grew up
When MIT was celebrating the 50th anniversary of the Apollo 11 mission
Caldelas received an email from the department asking for students to help escort astronauts around the events
he filled out the form — if there is an opportunity to meet an astronaut
Caldelas was assigned to Mark Lee, a former Air Force Colonel and NASA astronaut who flew on four Space Shuttle missions
Lee stopped in the middle of the hallway of photographs and nonchalantly said “that’s me,” pointing to a large photograph of a man in a white space suit with Earth in the background
Caldelas looked at the frame and saw the name “Mark Lee” on it
He immediately asked for a photograph of the two of them with the historic image in the background.
Who else can say they met the astronaut in a famous photograph?” Caldelas says
Caldelas kept saying how he can’t believe he is in the same space as so many MIT legends
A national Hispanic Scholarship Fund recipient
Caldelas is also a first-generation American
one of the first Hispanic students to be accepted into the engineering program at his high school
and the first person to get into MIT from his New Jersey high school
He’s constantly grateful for his opportunities and hopes to inspire the next generation
just as the MIT astronauts and their photographs inspired him.
“You don’t have to be perfect to go to this school
“It’s really humbling for me live out my dreams to come to MIT
And I want to honor this opportunity by inspiring others to keep going and reach for their dreams.”
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Volume 15 - 2024 | https://doi.org/10.3389/fimmu.2024.1357726
characterized by its complexity and diversity
presents significant challenges in understanding its underlying biology
we employed gene co-expression network analysis to investigate the gene composition and functional patterns in breast cancer subtypes and normal breast tissue
Our objective was to elucidate the detailed immunological features distinguishing these tumors at the transcriptional level and to explore their implications for diagnosis and treatment
The analysis identified nine distinct gene module clusters
each representing unique transcriptional signatures within breast cancer subtypes and normal tissue
while some clusters exhibited high similarity in gene composition between normal tissue and certain subtypes
others showed lower similarity and shared traits
These clusters provided insights into the immune responses within breast cancer subtypes
including innate and adaptive immune responses
Our findings contribute to a deeper understanding of the molecular mechanisms underlying breast cancer subtypes and highlight their unique characteristics
The immunological signatures identified in this study hold potential implications for diagnostic and therapeutic strategies
the network-based approach introduced herein presents a valuable framework for understanding the complexities of other diseases and elucidating their underlying biology
Understanding the intricate connections between immune responses and breast cancer is vital for unraveling the complexities of this disease and developing innovative immunotherapeutic approaches that hold promise in improving patient outcomes
The intricate interplay between inflammation and immune responses in the context of breast cancer has emerged as a critical avenue of research
with the potential to shed light on the underlying molecular mechanisms driving this complex disease
we delve into the gene expression profiles within distinct molecular subtypes of breast cancer to elucidate the subtle yet pivotal variations in the coordination of inflammation and immune responses
By dissecting these intricate interactions at the gene expression level
we aim to uncover novel insights that may pave the way for more tailored therapeutic strategies and a deeper understanding of the disease’s heterogeneity
This investigation aims to contribute towards refining our comprehension of breast cancer biology and ultimately enhancing patient care
Table 1 Number of samples corresponding to each breast cancer molecular intrinsic subtype
the network serves as a representation of the co-expression patterns found within the tissue from which the data originate
One notable structural feature is the presence of highly interconnected groups of co-expressed genes or communities
if two genes are linked to a third gene within the same community
it is likely that they are also connected to each other
communities tend to have sparser connections with the rest of the network
These communities can offer valuable insights into the potential co-occurrence of proteins within cells
hinting at possible interactions and contributions to biological processes
depending on the specificities of the background noise of the underlying experiments and the intrinsic variability of the samples
between 0.01% and 0.1% of these dependencies are strong enough to represent biologically relevant co-expression relations in cancer
thus forming the basis for co-expression networks
That was the rationale used here to retain the top 100,000 higher MI links in the different networks
Enrichment values were assessed for statistical significance by means of hypergeometric permutation tests with FDR-corrected p-values less than 0.05
we will use the term enriched communities as a short-hand for Community (or module) with statistically significant categories on a gene set enrichment analysis
Table 2 General comparison between the top 100k interactions networks
We compared communities at three complementary levels
we looked at functional enrichment to see functional patterns within the same network and between networks
we compared the gene composition of the communities between networks to see if the similarities at the functional level were a reflection of similar gene composition
we compared the structure of the communities looking at the gene-to-gene associations (also called interactions or edges)
Community similarity was determined using the Jaccard similarity index
which is the size of their intersection divided by the size of their union
Differential expression analysis was performed with the Limma package (34) from Bioconductor Ver
The statistical method used was empirical Bayes and the criteria for differential expression was −1≤log fold change ≥1 and B statistic ≥6
Figure 1 Significantly enriched categories in GO Biological Process for the communities in the Luminal A breast cancer subtype network. Although only one breast cancer subtype is presented, it is representative of the pattern of enrichment classes in which each community presents characteristic, non-shared enrichment categories, which suggests functional specialization of the communities (see Supplementary Figures 1–3)
Processes that are shared by multiple modules are few and defined in a very general manner
A line spanning one of the lower rows through many communities labeled with genes for the ZNF family of proteins
Such communities contain multiple genes annotated as transcription factors and contribute to the significance in the enrichment of the rather general process GO:0006357 Regulation of transcription by RNA polymerase II
Figure 2 Significantly enriched categories in GO Biological Process for the communities in the Normal (healthy) tissue network
Statistically significant categories differ from the Cancer networks (see Supplementary data for further details)
An overview of the enriched categories on each network provides a general idea of the complexity of underlying functions driving a phenotype
Each one of the enrichment sets includes a wide array of processes
Processes enriched in the normal phenotype are biased towards cellular metabolism
these functions are congruent with tissue maintenance and metabolism
tumor phenotypes show a number of processes associated to an active immune response
We found also a number of processes associated to immune cell migration
This pattern is shared although with differences between each tumor subtype
a recurring theme is the presence of multiple instances of regulation of gene expression where multiple communities show one or more GO terms associated with it
These communities contain genes for transcription factors
An interesting difference in tumor phenotypes is the presence to a higher degree of multiple process enrichments for mRNA processing
and post-translational regulation by protein degradation
Figure 3 Comparison of the communities with inflammation and immune system enrichment categories from all networks
Clusters of communities with similar enrichment patterns can be observed; some of the enriched categories appear in all networks
Figure 4 Visualization of the Jaccard Similarity index between communities with immune system enrichment categories from all networks
Groups of communities with high similarity can be observed and such groups correspond to the clusters in the left panel
which are color coded and named based on the network of origin
Node size is proportional to the number of genes it contains
Edges represent the degree of similarity and edge thickness is proportional to the similarity between modules
Given the numerous coincidences in enriched categories between phenotypes
we wanted to know whether similar enrichment patterns between distinct networks were the product of them having equivalent communities formed by similar sets of genes connected in a similar way
We constructed a meta-network with nodes from immune-enriched communities in all networks and defined connections between them based on their structural similarity
The comparison by gene composition shows a pattern similar to enriched categories
Communities from distinct phenotypes form interconnected groups
some of which have more than 50% of shared genes and correspond to the core of the functional groups In all cases
which means no module has an identical module in any other network
The community structure similarity, in which we compare the degree in which genes in similar communities are connected in the same way, confirms the observed patterns, but with overall smaller Jaccard index values, compared to those of gene composition. In this comparison, some of the communities that share genes do not have any equivalent connections, which reflects differences in gene associations between networks at a finer structural level (30)
we refer to these groups of communities with similar gene composition
and functional enrichment as similarity clusters
we present a summary for each similarity cluster
Similarity cluster 1 consists of communities: Normal 97 (18 genes)
This cluster contains communities from the four subtypes and normal tissue
The communities in this cluster have a high gene composition similarity between breast cancer subtypes
with Jaccard similarity values between 0.7 and 0.82
and comparatively lower similarity between the normal tissue and the cancer subtypes with values between 0.34 and 0.41
The structural similarity of the communities shows a similar pattern with the highest similarity values between the four breast cancer subtypes and the lowest values between normal tissue and the subtypes
All the enrichment categories for this cluster are in association with histone function
None of the communities in this cluster have exclusive enrichment classes
Enrichment classes include processes associated to antiviral response mediated by interferons
Interestingly, similarity cluster 5, which includes communities Normal 58, LumA 75, LumB 69, Her2 77, and Basal 78, comprises genes for cytokine receptors, components of the T-cell receptor, and the T-cell signaling pathway (61, 62). It also contains genes for the CD8 co-receptor and enzymes of the cytotoxic effector function (Granzymes A, B, H and PRF1) (63, 64)
IFNG gene is also part of the communities in the cluster
Similarity cluster 6 includes the following communities: Normal 56 and LumA 122
It includes mostly genes for extracellular matrix components
many of them members of the collagen family
Enrichment categories refer mostly to extracellular matrix organization and the process Regulation of immune response (GO:0050776) appears
perhaps as an artifact of the annotation due to the interaction between immune cells and the extracellular matrix necessary for recruitment
Because of the heterogeneity in gene composition
this cluster presents numerous enrichment classes that are not shared between communities or shared by only two or three of them
Similarity cluster 8 includes the following communities: Normal 10, LumA 84, LumB 120, and Basal 156. This cluster has low levels of similitude between communities and the enrichment categories and genes are not shared across all communities. Enrichment classes in this group include cell signaling molecules, particularly chemokines like CCL2, CCL3, and CCL4, and components of the MAPK pathway including DUSP1, FOSB, JUN, and JUNB (66–68)
Finally, similarity cluster 9 includes the following communities: Normal 61, LumA 112, LumB 119, Her2 104, and Basal 96. Enrichment classes for this cluster share CD79A, SLAMF7, and TNFRSF17 genes in the process Adaptive immune response (GO:0002250). These molecules play a role in cell signaling in lymphocytes (10)
it is notable that Cluster 4 exhibits the highest degree of gene composition similarity between normal and its subtypes
Her2 shows lower similarity and shares genes with cluster 7 as well
Cluster 1 displays less similarity with tumors
but it exhibits similar immunologic functions within itself
Cluster 3 does not exhibit enriched immunologic functions in normal tissue
Through the comparison of statistically enriched GO processes between networks
we can identify a number of GO terms that are statistically significant in one network
but not significant in any of the other networks
Basal subtype GO exclusive categories include processes related to immune cell recruitment and activation, mostly through cytokines in the CCL family: CCL2, CCL3, CCL4, CCL19, and CCL21. Other exclusive processes suggest functions of lymphocytes through molecules like FOXP3 and EOMES, which are associated with lymphocyte homeostasis, or BTK, which is part of the B-cell receptor signaling pathway (69, 70)
Other processes not directly associated to the immune response but with chromatin structure are represented in module 102
which contains predominantly histone genes
Her2 subtype GO exclusive categories include processes related to immune cell recruitment and activation, including antigen processing by immunoproteasome, leukocyte migration signals by S100 family genes, and transcriptional control and antiviral response by TRIM family members (71, 72)
Normal tissue GO exclusive processes are predominantly associated with cell cycle control
These include molecules involved with DNA replication as well as components of the mitotic control and mitotic effector machinery
We compared average gene expression levels in the four breast cancer subtypes against the normal phenotype and mapped them to each one of the selected communities in the breast cancer subtypes
The modules show various patterns of differential expression
although many genes show expression levels not significantly different than normal tissue and are the majority in some of the communities
Differential expression patterns are not completely uniform within each community. Modules show distinct differential expression patterns. In some communities, we can even find examples of over-expressed, under-expressed, and non-differentially expressed genes (Figures 5–8)
Figure 5 Differential gene expression with respect to normal breast tissue in the communities enriched in inflammation and immune response GO processes from the Luminal A subtype network
Differential expression is similar along genes in the same community
although most communities have genes with many distinct differential expression patterns with respect to normal tissue
Figure 6 Differential gene expression with respect to normal breast tissue in the communities enriched in inflammation and immune response GO processes from the Luminal B subtype network
Figure 7 Differential gene expression with respect to normal breast tissue in the communities enriched in inflammation and immune response GO processes from the Her2-enriched subtype network
Figure 8 Differential gene expression with respect to normal breast tissue in the communities enriched in inflammation and immune response GO processes from the Basal subtype network
Differential expression patterns tend to be roughly similar between communities belonging to the same similarity cluster
The most evident of which is similarity cluster 1
Modules in this cluster contain mostly over-expressed genes of the histone family
This is the only cluster with both consistent differential expression level and high gene composition similarity across all four breast cancer subtypes
The gene compositions of the similarity clusters display some distinctive patterns. We can see in Figure 9 that most of the clusters are different, sharing none or just a few genes (see also Supplementary Tables 2, 3)
a few clusters (yellow and orange pixels) may have significantly large intersections
with Jaccard indices up to 0.8125 in the case of the Basal 102 and Her2 107 clusters
Figure 9 Heatmap matrix presenting Jaccard indices showing the relative intersection of the gene compositions for all similarity clusters discussed
It can be seen that there are a few clusters with relatively high intersections
but most of these have characteristic gene compositions
Other clusters showing significant overlap are among the Basal ones: Basal 102 with Lum A 98 (Jaccard index ≃ 0.743)
Basal 110 with Normal 96 (Jaccard index ≃ 0.682)
and Basal 137 with Lum B 130 (Jaccard index ≃ 0.647)
the aforementioned similarities were with Basal 102
and Her 2 127 with Basal 137 (Jaccard index ≃ 0.625)
For Lum A clusters: Lum A 111 significantly overlaps with Lum B 130 (Jaccard index ≃ 0.519) and Lum A 114 significantly overlaps with Lum B 116 (Jaccard index ≃ 0.577)
Lum B 11 significantly overlaps with Her 2 107 (Jaccard index = 0.75)
We can notice (even by a glimpse at Figure 9) that in the case of the normal tissue
most clusters have a very small overlap with those of the cancer subtypes
with the notable exception of the intersection of cluster Normal 86 with Basal 110 and Lum A 114 (both with Jaccard index ≃ 0.682) and with Lum B 116 (Jaccard index ≃ 0.714)
This study delves into the complex world of transcriptional regulation within breast cancer molecular subtypes and normal breast tissue
shedding light on how the gene networks differ between these categories
One of the significant findings is the variation in gene composition and structural characteristics of the networks across different subtypes and normal breast tissue
subtle differences in how genes are associated into co-expression groups referred to here as communities
and the internal structure of these communities
It is relevant to highlight that the present study
represents a coarse-grained view that although quite useful is expected to be complemented and in many cases superseded by analysis of single-cell and spatial transcriptomic experiments
but since higher costs and logistic and experimental complexities continue to prevent them from being applied to large sample sets (many individuals and not just many cells)
we believe that the broad view presented here is still quite valuable
we did not just consider genes present in immune cells
This is so since we are convinced that the underlying information that we can gather from analyzing the different cell types in the tumor environment would further illuminate our understanding on these matters
hence we did not focus only on gene expressed in immune cells since it is very likely that those genes will have associated with other genes and pathways
and by being restricted to this information without considering differences in cell populations
they devised a novel framework to identify distinct patterns of gene co-expression networks and inflammation-related modules from genome-scale microarray data following viral infection
these modules were categorized into oncogenic and dysfunctional types
The core of the framework involves the comparative examination of viral infection modules across various disease stages and types
Module preservation during disease progression is assessed based on alterations in network connectivity across different stages
The evaluation of similarities and differences in HBV and HCV involved comparing the overlap of gene compositions and functional annotations in their respective modules
The identification of co-expression modules allows researchers to uncover key genes that may act in concert to drive cancer development
These modules often comprise genes with related functions
participating in common biological pathways or cellular processes
Dissecting gene co-expression networks in cancer can reveal potential biomarkers
and insights into the heterogeneity of tumors
which was able to provide novel insights into viral hepatocarcinogenesis and disease progression
underscoring the advantages of an integrative and comparative network analysis over existing approaches reliant on differential expression and virus–host interactome-based methodologies
Regarding the identification of communities related to inflammation and immune responses, the comparison of community enrichment profiles uncovers shared enrichment classes among different networks, even including the normal tissue network (36, 82)
These shared functions are organized into clusters that exhibit similar enrichment patterns
Our findings reveal interconnected groups of communities across various subtypes
it is crucial to note that no community is identical to another in any network
The results of this analysis reveal fascinating insights into the transcriptional regulation of genes within different breast cancer molecular subtypes and normal breast tissue
Each similarity cluster presents distinct characteristics
and functional enrichment patterns that are of great significance for our understanding of breast cancer biology
Similarity Cluster 1 encompasses modules from all breast cancer subtypes and normal tissue
gene composition similarity is highest between breast cancer subtypes
while normal tissue exhibits lower similarity with the cancer subtypes
The cluster predominantly features genes coding for histone proteins and is associated with immune response due to the role of histones in antimicrobial responses
communities from all breast cancer subtypes and normal tissue are grouped together
Gene composition similarity is more pronounced between the breast cancer subtype communities
whereas lower similarity values exist between normal tissue and cancer subtypes
This cluster is enriched with genes associated with antiviral responses mediated by interferons
and Basal subtypes are part of this cluster
Gene composition similarity varies within this cluster
with a few shared genes and enriched categories from Normal 392
This cluster predominantly contains genes related to MHC class I molecules and antigen processing and presentation
and Normal are represented in Similarity Cluster 4
with the smallest community (Normal 86) displaying the highest similarity values
This cluster features genes for MHC class II molecules
This result (relatively high similarity between normal tissue and PAM50 subtypes in MHC II molecules) appears paradoxical given that it is known that here is a low level of immune-related surveillance in normal tissue
we do not have a definite explanation to this fact
but perhaps this will be better understood in the future by examining
single-cell and spatial transcriptomics data
One possible explanation is that some of the molecules involved in cancer-related immune surveillance may play additional roles in normal cells
of the four main stages of immune surveillance (antigen recognition
the first and the last (antigen recognition and memory response) may be active even in normal cells
Similarity Cluster 5 comprises genes for cytokine receptors
along with genes related to cytotoxic effector functions common to all subtypes
This cluster is notable for its association with genes promoting immune response
Similarity Cluster 6 includes communities from Normal and LumA subtypes
primarily characterized by genes related to extracellular matrix components
Enrichment categories focus on extracellular matrix organization and potential immune responses
likely due to interactions between immune cells and the extracellular matrix
Similarity Cluster 7 exhibits comparatively lower similarity values
The variety in gene composition results in numerous enrichment classes that may not be shared across all communities
A similar trend is seen in Similarity Cluster 8
and Basal subtypes; this cluster displays low similarity levels between modules
Enrichment categories include cell signaling molecules and chemokines like CCL2
and Basal subtypes make up Similarity Cluster 9
It features enrichment classes shared by genes like CD79A
and TNFRSF17 in the context of adaptive immune response
these findings highlight the unique gene composition and enrichment patterns within each similarity cluster
offering a comprehensive view of the complex immunological functions associated with breast cancer molecular subtypes and normal breast tissue
Cluster 4 exhibits the highest gene composition similarity between normal tissue and its subtypes
whereas Her2 displays lower similarity and shares features with Cluster 7
showcases dissimilarity with tumors but retains shared immunologic functions within its communities
These results deepen our understanding of the molecular mechanisms at play in breast cancer subtypes
shedding light on their unique characteristics and potential implications for diagnosis and treatment
We can notice the subtle differences in gene composition and network structure
as well as the importance of shared functional enrichments
which can be interpreted as a global context of the phenotype and providing a foundation for further understanding the regulation of inflammation and immune responses in these phenotypes
communities in the network do not correspond to groups of uniformly differentially expressed genes
genes with similar differential expression tendencies are scattered across a number of communities in the network
We believe this is evidence for the notion that differential expression is not a characteristic that uniquely determines the formation of co-expressed groups
This also opens the question of what other factors may contribute in the formation of such co-expression patterns
especially if we consider the occurrence of distinct co-expressed but non differentially expressed genes
a subtlety that is lost when screening only differentially expressed genes
We can argue that differences in behavior may arise also from differences in the co-expression context of genes
could lead to changes in molecular dynamics and behavior contributing to the expression of a particular phenotype
is not optimal in the identification of individual genetic actors
but rather to discern general differences in expression patterns between phenotypes
Gene products often have pleiotropic effects
and it seems reasonable they be regulated in many different contexts
This could be one of the causes of the observed multiple connections in our co-expression networks
We would like to highlight a recurrent observation in genome-wide co-expression enrichment patterns
highly statistically significant instances of enrichment of immune system categories
each cell can be seen as the result of a particular gene-expression program taking effect in the context of the organism
the presence of mutations at various levels is recognized as a recurrent and important cause that drives changes in gene expression patterns and the phenotype
these transformed cells interact with other non-transformed cells affecting their behavior
This is frequently proposed in the form of cancer hijacking normal biological mechanisms to favor its own development
We believe that the recurrence of gene co-expression patterns may be the result of this appropriation of mechanisms by tumors from otherwise genetically normal immune and adjacent normal cells
This may also be one factor causing the observed similarity clusters where we find numerous genes whose expression is restricted to specific cell lineages
The integration of multi-omics approaches, including DNA methylation assays (84), copy number variants (CNVs) (85, 86), miRNA expression profiling (87–89), transcription factor binding site analysis (90), and proteomics (91), can further improve our understanding of gene regulation in breast cancer tumors (84, 92)
These comprehensive techniques offer unprecedented insights into the intricate molecular mechanisms underlying tumorigenesis and progression
they illuminate how alterations in DNA methylation patterns
and dysregulated protein expression contribute to the development and behavior of breast cancer
these multi-omics approaches also shed light on the potential role of gene regulation in modulating immune responses within the tumor microenvironment
By uncovering key molecular players involved in immune evasion or activation
multi-omics analyses provide valuable insights for the development of novel immunotherapeutic strategies aimed at harnessing the immune system to combat breast cancer
and in contrast with analyses based purely on gene composition
which show a relatively low number of significant similarities between the similarity clusters
but more closely in line with functional enrichment analyses
it was found that a number of multi-omic regulatory interactions exists for these clusters and there is a non-trivial overlap between those
Our studies highlight the roles that multitargeted transcription factors
and epigenomic phenomena (mostly in the form of hypomethylated regions) play in consolidating biological functions in the similarity clusters
For brevity, we must only comment on some of these relationships; however, the full set of SGCCA statistically significant multi-omic calculated associations can be found in Supplementary Table 4. Note that the microRNA hsa-mir-146a-5p is a highly significant common multi-omic regulator of the Basal 104, Her2 88, LumA 83, Lum B 93, and Normal 26 similarity clusters (technical note: p-values have been capped in Supplementary Table 4
so that any p-value less than 1E−16 appears displayed as 0 [zero])
hsa-mir-152–3p is a common regulator of the Her2 127 and Lum A 111 clusters
Perhaps the most consistent finding (though not surprising at all) is that transcription factors of the IRF family are master regulators of many similarity clusters
most of them in cancer subtypes (with the exception of the Normal 26 cluster)
we found that there is significant hypomethylation in promoter regions of the MTF-1 gene associated with the expression patterns in the Basal 102 and Lum B 116 clusters
more comprehensive analyses need to be performed in order to unveil the full potential of multi-omics to reveal the extent of immune-related transcriptional regulatory processes in breast tumor subtypes
It is very likely that these future studies may involve single-cell multi-omic descriptions
These studies are on themselves challenging long-term projects before strong conclusions can be reached
we can argue that the effect of CNVs in breast cancer co-expression may likely explain just a fraction of the associated variance
the ultimate benchmark in natural sciences remains experimental validation
Several potential experimental methodologies may include proteomic
Breast cancer is a highly heterogeneous disease
Among the sources of variability in phenotype presentation
some are related to ancestry and the genetic makeup of the underlying populations
The TCGA–Genomic Data Commons database is one of the largest
most comprehensive and curated repositories of omic data for cancer
most samples belong to US residents and are thus enriched in Caucasian ancestry
In spite of this and other design considerations
it spans a lot of variability that can be indeed stratified for its well-curated metadata
both clinically and regarding other determinants of health
we used TCGA as our primary dataset and indeed we were able to adapt this to our own designs by further classifying and prioritizing the particular samples we used in our study
That was the reason to further reclassify samples with more stringent algorithms
Although the issue of generalizability of results just described is quite relevant
we believe that these analyses will provide enough insight to serve as a starting point for deeper
We consider relevant to recognize the origin of the data and the limitations of the variables measured
Our data come from fine needle aspiration (FNA) samples taken from living tissue
These samples contain a number of different cells that are representative of the cells present within the tissue and processed in bulk
measured mRNA abundances reflect small regions of the tissue of origin and not specific cell types
This is a technical limitation we hope gets resolved with more recent single-cell sequencing technologies
we have measured abundances of RNA species assigned to known genes
which we assume as a proxy for protein abundance
although the active modulation of cell behavior through these processes is hinted in the structure and gene composition of the networks
our study allowed us to shed some light to further understand the complex and distinctive transcriptional networks within various breast cancer molecular subtypes and normal breast tissue
we have identified nine similarity clusters of gene communities whose transcriptional signatures (some of them similar among themselves and even to normal healthy tumor-adjacent tissue
in terms of co-expression patterns) may contribute to characterize the immunological response patterns (as reflected in gene co-expression activity) shared
The presence of both innate and adaptive immune responses may reflect a coordinated immunological defense mechanism against the disease
These immunological signatures not only may deepen our comprehension of the similarities and differences among subtypes
but also are able to potentially advance our understanding of the relevant functional features towards the development of personalized diagnostic and therapeutic strategies
our network-based approach provides a valuable framework for dissecting the complexities involved in breast cancer-associated immune responses
paving the way to uncover their underlying biology
we hope that these insights may be gradually translated into tangible clinical benefits
ultimately improving patient outcomes and transforming the current approach to cancer management
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 humans were approved by NCI/NHGRI TCGA Data Access Committee -for further information please communicate todGNnYWRhY0BtYWlsLm5paC5nb3Y=
The studies were conducted in accordance with the local legislation and institutional requirements
Written informed consent for participation was not required from the participants or the participants’ legal guardians/next of kin in accordance with the national legislation and institutional requirements
The author(s) declare that no financial support was received for the research
The results published here are based on data generated by the TCGA Research Network: https://www.cancer.gov/tcga
Guillermo de Anda-Jauregui´ for valuable technical advice
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
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
The Supplementary Material for this article can be found online at: https://www.frontiersin.org/articles/10.3389/fimmu.2024.1357726/full#supplementary-material
Supplementary File 1 | Excel spreadsheet with enrichment results for communities with immune-related categories
Supplementary Figure 1 | Heatmap comparing all enriched categories from all networks
Communities with immune -related enrichments are labelled in red
Supplementary Figure 2 | Heatmap comparing enrichments in all immune-related modules between all networks
Supplementary Figure 3 | Chart comparing DE status of genes from cluster 1 present in all cancer phenotypes
Scripts used to perform these analyses are publicly available at the following repositories:
https://github.com/tadeito/breastcancerimmunenetworks
https://github.com/josemaz/omicsBRCA
https://github.com/CSB-IG/SGCCA
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Dna methyltransferase inhibition upregulates mhc-i to potentiate cytotoxic t lymphocyte responses in breast cancer
Downregulation of tap1 and tap2 in early stage breast cancer
Tradeoff between metabolic i-proteasome addiction and immune evasion in triple-negative breast cancer
Increased expression of the immunoproteasome subunits psmb8 and psmb9 by cancer cells correlate with better outcomes for triple-negative breast cancers
Activation of erα signaling differentially modulates ifn-γ induced hla-class ii expression in breast cancer cells
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Proteomic profiling reveals that esr1 mutations enhance cyclin-dependent kinase signaling
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Regulated phosphosignaling associated with breast cancer subtypes and druggability*[s]
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Cancer-associated fibroblasts-derived exosomes suppress immune cell function in breast cancer via the mir-92/pd-l1 pathway
Lncrna gata3-as1 facilitates tumour progression and immune escape in triple-negative breast cancer through destabilization of gata3 but stabilization of pd-l1
Functional th1-oriented t follicular helper cells that infiltrate human breast cancer promote effective adaptive immunity
Zamora-Fuentes JM and Hernandez-Lemus E (2024) Coordinated inflammation and immune response transcriptional regulation in breast cancer molecular subtypes
Received: 18 December 2023; Accepted: 03 June 2024;Published: 25 June 2024
Copyright © 2024 Velazquez-Caldelas, Zamora-Fuentes and Hernandez-Lemus. 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: Enrique Hernandez-Lemus, ZWhlcm5hbmRlekBpbm1lZ2VuLmdvYi5teA==
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Matt Velasquez (24) of Mainland and Angelo Panzini (17) of Middle Township battle for the ball during the boys soccer match between Middle Township and Mainlnd at Boyd Street Field in Cape May Court House
NJ on 9/16/24.Scott Faytok | NJ Advance Media
.st1{fill-rule:evenodd;clip-rule:evenodd;fill:#2a2a2a}By Jake Aferiat | NJ Advance Media for NJ.comCheck out the lists below to see the top freshman season stat leaders as of Wednesday
*These numbers are based off stats reported by coaches to njschoolsports.com.*
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or copy it and paste into your mobile web browser
Jake Aferiat can be reached at jaferiat@njadvancemedia.com. Follow him at @Jake_Aferiat
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Science of the Total EnvironmentCitation Excerpt :Although the use of mulch is effective for reducing soil loss in severely burned areas
it did not seem to have any effects on the soil physicochemical properties (Norland
other authors describe changes in soil chemical after mulching (Prats et al.
we found that the soil properties had a significant effect on the overall composition of fungal OTUs
Science of the Total EnvironmentCitation Excerpt :The sediments' OM contents were not significantly affected by mulch
as reported in other burned areas treated with forest residue (Prats et al.
2012) or straw mulch (Fernández-Fernández and González-Prieto
they contrast with the findings of other research using wood strand mulch (Pierson et al
2016a) or corn/wheat straw mulch (Prats et al.
2022) that reported significant increases in the OM content of sediments from the mulched plots
These discrepancies can be attributed primarily to the mulch degradation rates
All content on this site: Copyright © 2025 Elsevier B.V.
When San Diego Metropolitan Transit System Security Officer Carlos Paredes collapsed from cardiac arrest at the 12th & Imperial Transit Center on February 9
the quick actions taken by seven of his colleagues in MTS Security helped save his life
Thanks to his colleagues’ training in CPR and Automated External Defibrillator (AED) use
Officer Paredes was able to attend today’s MTS Board of Directors meeting
during which the seven officers that worked together to save his life were recognized
MTS Board Chair Georgette Gómez presented the officers with a plaque recognizing their life-saving efforts
“It is not an exaggeration to state that Officer Paredes would likely not be here today without the efforts of the seven officers,” said Gómez
they performed a heroic act to save the life of a fellow human being.”
Officer Paredes collapsed at the 12th & Imperial Station near the MTS headquarters
He was quickly moved to a safe location by fellow officers Jeremy Echeverria and Brandon Garcia
who radioed MTS Central Control and requested paramedics
Officer Alex Masciovecchio arrived at the scene
determined that Paredes had no pulse and began to perform CPR for several minutes
retrieved an AED and used the device on Officer Paredes
who was moments later resuscitated by paramedics arriving at the scene
The seven officers were recognized for their heroic actions by the MTS Board of Directors during today’s public meeting
The actions taken by the officers are an excellent example of the dedication and professionalism of the MTS Transit Enforcement personnel
Castro Caldelas will be the second place in Galicia declared as one of the most beautiful villages in Spain
The Association of the Most Beautiful Villages in Spain has decided to include in its select list the town of Castro Caldelas
which will officially be proclaimed on Friday
It will be conducted by the television presenter Lucía Rodríguez and will be chaired by the main political leaders of the province
the event will end with the performance of the tenor Bernardino Atienza
the Real Banda de Gaitas de Ourense and the Banda de Gaitas Os Trabazos
© 2018 Ribeira Sacra Tourism Consortium
Spanish shipping company Elcano has taken delivery of its two ME-GI liquefied natural gas (LNG) carriers from the Japanese shipbuilder Imabari
The duo capable of transporting 178,000 cubic meters of the chilled fuel each will operate under a charter deal with Naturgy
transporting US LNG volumes from Cheniere’s Sabine Pass export facility in Louisiana
Castilo de Caldelas departed the Imabari’s Saijo shipyard in mid-June
The vessel delivered a cargo from Qatari LNG complex in Ras Laffan to Portuguese REN-operated Sines terminal on July 26
the vessel delivered 63,000 tons of the chilled fuel to the Portuguese market
Three days later the vessel docked at the Elengy-operated Montoir-de-Bretagne LNG terminal in France and is currently sailing in the Mediterranean Sea
Castillo de Caldelas joins the first vessel in Elcano’s pair built at Imabari
the Castillo de Merida that was delivered earlier in March
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Ingersoll Rand Engineering Project Solutions At Ingersoll Rand’s Engineering Project Solutions
we have been managing and implementing engineered to-order air packages for complex technical requirements for over 60 years
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Essentials
Stroll around the city centre, visit this great museum and enjoy a drink or a meal at any of its squares
Views with the Cíes Islands in the background
Visit the old towns of Vigo and Baiona and immerse yourself in their fascinating history
Enjoy the thermal springs of Mondariz and discover the wines from O Condado de Tea
This fish is tasted in the alameda (tree-lined avenue), by the river. It is accompanied by several interesting activities such as exhibitions, concerts, sport events, fishing courses, a motorcycle rally and a choral competition.
The International Fishing Competition under the category of salmonids contributed to the creation and consolidation of the Trout Festival. Fishermen and fisherwoman coming from different places of Galicia and Portugal gather in Ponte Caldelas to get a good catch and to win some of the cherished trophies in the different categories.
The competition, one of the most awaited of the fishing season in the Euroregion, attracted, from the very beginning, many participants who, in turn, contributed to the promotion of Ponte Caldelas. Apart from celebrating a fellowship meal that also extols the trout, ludic and cultural activities were also organised and they contributed to consolidate it in the decades ahead.
There has been no let-up in the pace of LNG carrier shipyard activity so far in 2018. In the two months since LNG World Shipping’s previous fleet review, 10 LNG carriers have been handed over to their owners and nine further such vessels have been ordered.
In the four months to 30 April 2018, 23 LNG carriers were delivered and 18 vessels added to the orderbook. Japanese owners, charterers and shipbuilders have been at the fore in the latest batch of ship completions.
The portfolio of ships delivered in the last two months includes the first Moss spherical tank LNG carrier to be powered by a dual-fuel diesel-electric (DFDE) propulsion system and the largest Moss spherical tank ship ever built. Both breakthrough vessels were constructed by the Sakaide yard of Kawasaki Heavy Industries (KHI) in Japan.
All the large, conventional-size LNG carriers built by KHI to date have Moss containment systems and, prior to the recent deliveries, all KHI-built LNG carriers had been steam-turbine-powered.
KHI’s first DFDE ship is LNG Sakura, a 177,000 m3 vessel delivered to a 70/30 joint venture partnership comprising Kansai Electric Power (Kepco) and NYK Line, respectively. Kepco will charter the ship for 20 years, to lift cargoes from Dominion Energy’s newly commissioned Cove Point export terminal in the US, among other facilities, while NYK Line will operate the vessel.
KHI has utilised its proprietary polyurethane foam Kawasaki Panel System to insulate the four spherical tanks on the twin-screw LNG Sakura (Sakura means “cherry blossom” in Japanese). The technology yields a comparatively low cargo boil-off gas (BOG) rate of 0.08% per day, an attractive attribute considering the long transpacific voyages on which the vessel will be engaged.
LNG Sakura departed Cove Point on 22 April with its inaugural cargo from the facility. The construction of a 5.1 million tonnes per annum (mta) liquefaction train at what was previously an LNG import terminal has given the Maryland facility a bi-directional capability.
While LNG Sakura marks a step up in size from KHI’s earlier LNG carriers, its next completion, the 182,000 m3 Pacific Breeze commissioned a few weeks later, is the world’s largest Moss ship.
Pacific Breeze is owned by K Line and chartered by IT Marine Transport, a joint Inpex/Total shipping operation, for use in the carriage of LNG from the new 8.9 mta Ichthys LNG export terminal near Darwin in Australia to Taiwan’s CPC Corporation. As a result of the ship’s capacity and the relatively short voyage distance, the charterers anticipate that Pacific Breeze will lift 1.75 mta at the Ichthys terminal.
Like LNG Sakura, Pacific Breeze is powered by a DFDE propulsion system and its Kawasaki Panel System insulation yields a cargo BOG rate of 0.08%.
As part of the Ichthys LNG terminal commissioning process, Pacific Breeze delivered a cooldown cargo loaded in Singapore to the Darwin site on 26 April 2018. Pacific Breeze remains in the area following discharge of the cooldown shipment and there is a possibility that the vessel is lined up to load the inaugural Ichthys LNG export cargo.
In March 2018 the Nagasaki yard of Mitsubishi Heavy Industries (MHI) delivered a Moss spherical tank ship for service with a new Australian export project. MHI handed over the 155,000 m3 Pacific Mimosa to LNG Marine Transport, a ship operating company in which Jera holds a 70% stake, Mitsubishi Corp 15% and NYK Line 15%. NYK is responsible for the ship’s technical management.
The vessel has been taken on long-term charter by Jera for lifting cargoes from the Chevron-led, 8.9 mta Wheatstone LNG project in northwestern Australia. Jera, a joint venture responsible for the combined LNG marketing activities of Tokyo Electric Power and Chubu Electric Power, is the largest buyer of Wheatstone’s output and lifted its first cargo from the project in November 2017.
Pacific Mimosa is powered by an ultra-steam-turbine (UST) propulsion system that makes use of reheated steam to achieve fuel efficiency gains of 15% over traditional steam turbines. With the UST technology the boiler generates high-pressure steam at 12 MPa and 565˚C by transferring the heat from the combustion of the cargo BOG.
To the non-LNG community there is no immediate indication that Pacific Mimosa has four cargo tanks. In contrast to traditional Moss ships, where almost one-half of each spherical cargo tank protrudes above the main deck, the newbuilding is one of the new generation of “peas-in-a-pod” Sayaendo system design from MHI.
That means that the top half of each cargo tank is obscured by the continuous tank cover the extends the length of the main deck in way of the cargo tanks. The cover not only protects the cargo tanks and deck pipework, but also adds to the vessel’s structural integrity.
Two other recent newbuildings have Japanese connections. Castillo de Merida is the first of a pair of 178,000 m3 newbuildings for Spain’s Naviera Elcano from the Saijo yard of Imabari, while the Samsung-built Marvel Falcon is destined to lift Cameron LNG exports under charter to Mitsui & Co and the technical management of NYK Line.
The capacity of Castillo de Merida marks a significant step up from the 154,000 m3 size of the previous LNG carriers built by Imabari. Castillo de Merida and its imminent Imabari newbuilding sistership, Castillo de Caldelas, have been taken on charter by Gas Natural Fenosa (GNF) for the lifting of Sabine Pass LNG cargoes in the US state of Louisiana; as an ability to optimise Panama Canal transit opportunities is paramount, the principals have decided on the 178,000 m3 size for the pair.
Castillo de Merida is propelled by a pair of MAN Diesel & Turbo’s M-type electronically controlled gas-injection (ME-GI) engines, a two-stroke propulsion system particularly popular in the LNG carrier sector at the moment. The ship also has GTT Mark III Flex membrane tanks, a containment system that provides a reduction in cargo BOG rates down to the 0.10% level.
While Imabari has achieved considerable success in the domestic shipbuilding sector in recent years, not least in the construction of next-generation ultra-large container ships for domestic shipowners, the fabrication of the latest LNG carriers has caused difficulties and the deliveries of Castillo de Meridas and Castillo de Caldedas were nine months later than originally planned.
The 174,000 m3 Marvel Falcon was delivered by Samsung Heavy Industries (SHI) to NYK Line in April 2018. The ship is the first in a fleet of eight new vessels that Mitsui & Co is taking on 25-year charters, primarily to lift cargoes from the planned Cameron LNG export terminal in Louisiana.
Marvel Falcon is powered by a pair of Generation X, low-pressure, dual-fuel, two-stroke (X-DF) engines developed by Winterthur Gas & Diesel (WinGD). Two-stroke engines are now the propulsion system of choice for conventional-size LNG carriers and, of the new ships ordered so far this year, preferences have been split fairly evenly between the ME-GI and X-DF engine types.
Volume 10 - 2019 | https://doi.org/10.3389/fimmu.2019.00056
Inflammation has been recognized as an important driver in the development and growth of malignancies
Inflammatory signaling in cancer emerges from the combinatorial interaction of several deregulated pathways
Pathway deregulation is often driven by changes in the underlying gene regulatory networks
it can be argued that a closer analysis of the structure of such regulatory networks will shed some light on how gene deregulation led to sustained inflammation in cancer
we inferred an inflammation-associated gene regulatory network from 641 breast cancer and 78 healthy samples
A modular structure analysis of the regulatory network was carried out
revealing a hierarchical modular structure
Modules show significant overrepresentation score p-values for biological processes unveiling a definite association between inflammatory processes and adaptive immunity
Other modules are enriched for T-cell activation
differentiation of CD8+ lymphocytes and immune cell migration
thus reinforcing the aforementioned association
These analyses suggest that in breast cancer tumors
the balance between antitumor response and immune tolerance involving CD8+ T cells is tipped in favor of the tumor
One possible mechanism is the induction of tolerance and anergization of these cells by persistent antigen exposure
cancerous phenotypes result from a complex of interacting biological processes or pathways that are subverted in favor of tumor survival
There is a strikingly similar scenario when we look at tumors
This suggests that inflammatory response in conjunction with the immune system plays an important role on breast cancer maintenance
Considering the intricate set of relationships that inflammation and immunity play in a complex phenotype such as a breast cancer
an integrative approach capable of capturing at least part of the complexity of biological processes related to inflammation results appealing
the construction of gene regulatory networks via the association between gene expression levels
offers us a valuable view on how groups of genes are being collectively coordinated
Previous work from our group has shown how network modularity structure is associated to biological functionality in transcription factor networks (20) and distinctive network structure for each of the major breast cancer molecular subtypes (24)
by means of an automated analysis of network inference
module detection and enrichment analysis we have been capable to detect specific processes in breast cancer molecular subtypes
we approach the entangled nature of the inflammatory process in the maintenance of breast cancer phenotype through the inference of an inflammation-related gene regulatory network and their associated genes (their immediate or first neighbors in network terminology)
then finding the modular structure of the network and associated biological processes for each module
We found a hierarchical modular structure in transcriptional networks associated to inflammatory response
where genes tend to be connected to others with similar differential expression patterns: overexpressed genes are more connected between them
Modules of the network are mainly associated to immune system
A comprehensive integrative framework allows us to observe a broader landscape of how inflammation may have influence in the establishment of pathological phenotypes
this exploratory approach could help to direct research toward more specific questions about therapeutic options
Graphical description of the methods followed in this work
(1) Gene expression datasets from GEO were selected
All datasets contained normal tissue samples and primary
merged and normalized to obtain an expression matrix (Rows correspond to genes and columns correspond to samples)
(3) Tumor samples expression matrix was used to calculate all statistical dependencies with the MI function between pairs of genes to construct the network
(4) The network was filtered to obtain the top 10,000 interactions ranked by MI value of genes in the inflammatory response process and first neighbors
(5) The inflammation network was analyzed to detect modules via the Infomap algorithm
(6) The resulting modules were tested for functional enrichment of Gene Ontology
GEO identifier and references for the data used here
A network in this context is a mathematical object composed of a colection of nodes that represent genes
and a colection of edges that represent the statistical dependency between pairs of genes
We used MI calculations implemented in the ARACNe algorithm (34) to calculate pairwise statistical dependency for all gene pairs in the platform (MI threshold set with p ≤ 1) which gives us a completely connected graph (a network where all possible interactions exist) for the whole-genome
Our network contains only the top 10,000 most stringent interactions between genes from the inflammatory response and their first neighbors
which correspond to 0.005% of possible correlated gene pairs
The reasoning behind this is that the genes defining the phenotype must have the strongest statistical dependencies between them
and also in order to minimize the effect of false positives
to start with a list of genes of interest can help us to discover other genes associated to them at the transcriptional level
This however does not guarantee that we recover all genes in the list but the ones within our imposed threshold
The network was curated starting from the complete graph using a reference gene list of the inflammatory process obtained from Gene Ontology (Inflammatory response process GO:0006954) with the following procedure: First
we ranked all interactions in descending order (largest to smallest MI value)
we searched for the genes sharing the strongest interactions with those in the inflammatory response process
This was done by filtering those interactions where at least one gene is part of the inflammatory response
From these interactions we took the top 10,000 interactions and obtained the names of all the genes involved which comprises the list of inflammatory response and associated genes
because we wanted to recover interactions between inflammation gene first neighbors
we extracted from the network the top 10,000 interactions between the genes of the list (inflammation and first neighbors)
We showed that gene modules are representative of distinct and meaningful biological functions
Thus, in order to find to find connectivity patterns in our network, here we used Infomap (19), a well-known flow-based information clustering method to determine the modular structure of complex networks. Likewise, we use the expanded version of Infomap to find a finer modular structure over the two-level modules using the hierarchical version of the map equation (35)
Using the hierarchical map equation it possible to exploit the fact that the modules in a network are themselves organized into submodules and sub-submodules which can reveal a richer multilevel organization. This approach has been successfully applied as well in the case of GNRs associated with Her2+ cancer subtype (36)
The number of genes contained in each module can amount to several hundred. Additionally, we have to deal with the fact that individual genes can be annotated for more than one function or pathway. To obtain biological insights from gene sets like these, we use statistical over representation analysis to reduce such large sets of individual gene names to identifiable biological functions (37)
choosing a significance p ≤ 1 × 10−5
The Inflammation-associated Gene Regulatory Network (IGRN) contains the top 10,000 interactions ordered by MI value; this IGRN has 942 genes with three connected components that contain more than 10 genes (Figures 2A–C and Supplementary File 1)
Information about the DE status for each node was mapped to the network
This revealed a definite composition of DE genes for each component
Network obtained from the MI highest interactions between inflammatory process genes and their first neighbors
The network consists of 942 genes and 10,000 interactions (edges)
Node color represent the differential expression status compared to healthy mammary tissue
White or pale color means no differential expression (−1≥LogFch ≤ 1)
This network consists of many connected components of which three of them (A–C) consists of more than 10 genes
Indicated with (D) are small components of less than 10 genes
By observing the way nodes aggregate in the largest component (A)
it is evident that the network has an internal modular structure where differential expression levels seem to cluster with similar differential expression trends
We further explored how this network is organized and which known biological processes are being regulated
The largest component contains 787 out of the 942 genes in the network. We explored the module structure of this component, which revealed a hierarchical structure of 4 first level and 28 second level modules or submodules (Table 2 and Supplementary File 2). Modules and submodules were labeled based on the highest page-ranked gene (Figure 3A)
modules and submodules are indicated with a subscript after the name of its highest ranked gene i.e
Modules and submodules in the largest component of the network
Modular structure of the largest component of the network
Darkest colors and largest circles show those modules with more genes; link widths correspond to the flow between modules
Node labels refer to genes with highest page rank in the module
(B) inter-module edges preferentially link genes with similar expression patterns
Modules are visualized by differential expression
Red links are inter-module edges linking two overexpressed genes
blue links are analogous but regarding underexpressed genes
gray links show intra-module edges and inter-module edges between no-differentially expressed elements
When we observe the DE status in individual submodules, it becomes evident how it tends to display characteristic patterns for each submodule. For instance, submodules such as LDB2sm are integrated by genes with a tendency to underexpression, and IFI44Lsm integrated by genes tending to overexpression (Figure 3B)
all genes have a DE status of no change respect to normal mammary tissue
other submodules such as SPARCsm and CCR5sm show a mixed DE profile
Coordinated over and underexpression gene sets may account for modulation of opposing or conflicting pathways
Modules are disjoint sets of nodes at the same hierarchical level
We performed overrepresentaion analysis for these gene sets
taking Gene Ontology:Biological Processes as the reference database
Statistically significant enrichment was found
Top enrichment scores for the CCR5m include immune response, innate immune response, cytokine-mediated signaling pathway, adaptive immune response, also included is inflammatory response (Figure 4)
SPARCm top enrichments include extracellular matrix organization
collagen catabolic process and angiogenesis
Since the inflammatory response process was enriched only in the CCR5m we focused on the biological processes and pathways of its submodules
Heatmap of GO Biological process enrichments for CCR5m submodules
each column corresponds to a detected module according to the network structure
Each row is the enriched biological process in the aforementioned modules
The color code represents the enrichment p-value: red color takes account for the most significant values
each module has a set of unique enriched processes
which could be related to the specificity of functions by each submodule
Seven out of eleven CCR5m submodules showed a statistically significant enrichment for GO Biological processes. Some of these enrichments were shared between submodules, with the largest category overlap between CCR5sm and CD2sm (Figure 4). These two submodules have numerous connections and are the two largest in terms of of gene and interaction counts (Figure 2)
is enriched for inflammatory response and other adaptive immune response processes
Genes coding for proteins involved in T lymphocyte signaling such as CD45
CD4 and CD28 which serve as coreceptors necessary for T cell activation
PIK3CD and VAV1 participate in the B cell signaling pathway
as well as in the Fcγ and Fcϵ signaling pathways through which receptor mediated endocytosis can be activated allowing antigen presenting cells to capture antigens bound to antibody molecules
which allows APCs to activate CD8+ T cells who normally attack infected or transformed cells through presentation of internally-only produced antigens
The molecules coordinated in this submodule suggest the coregulation of genes that elicit inflammatory cell recruitment mediated by cytokines
These functions are at the beginning of adaptive immune response
and complemented by characteristic processes of effector immune cells
This result will be discussed in the following section
and shares most of its GO enriched processes with the CCR5sm
CD2sm is highly connected to the CCR5sm sharing 831 edges
a chemotactic cytokine for lymphocytes recognized by CXCR3 and CCL8 also known as monocyte chemoattractant protein 2 (MCP-2)
recognized by CCR5 which serves as a chemoattractant to monocytes
which later can differentiate to phagocytic cells
in this submodule we observe a funtional relationship with CCR5sm
This is backed by the fact that CCR5sm triggers the adaptive immune response
meanwhile CD2sm is related to effector functions
mainly involved in CD8+ cells response
which could imply a temporal relationship between both submodules
The immunoproteasome has a distinct pattern of protein cleavage and the resulting peptides are more efficiently transported by TAP to the inside of the ER and more efficiently loaded in to MHC class I molecules
This allows the presentation of a distinct repertoire of antigens to CD8+ T lymphocytes and is important for the recognition and elimination of infected or transformed cells via the Cytotoxic T Lymphocyte (CTL) induced cell death in which perforin and granzyme play effector roles
This submodule contains genes that code cytokines CXCL10 and CXCL11 which are CXCR3 ligands involved in lymphocyte migration as chemoattractants and are induced by IFNγ signaling (49)
known as MCP1 and MCP2 also are chemoattractants for leukocytes
The coordinated expression of these genes suggests an active inflammatory process where leukocytes are recruited to the tumor
In order to quantitatively evaluate the association between inflammation and adaptive response, we performed a pathway deregulation analysis of our data by implementing the ‘Pathifier” algorithm (55) to identify sets of samples significantly deregulated (this is
PDS > 0.4) in the inflammation and adaptive response related pathways
From these analyses we found that out of our 641 tumor samples
a total of 395 (61.6%) were significantly deregulated in both
whereas 210 (32.7%) were strongly deregulated in adaptive immunity but not in inflammation
Also 22 (3.4%) tumor samples resulted in deregulated inflammation without significant adaptive immunity changes and just 14 tumors (2.18%) were not significantly affected in adaptive immunity nor in inflammation
It is noticeable that most tumors in our study are significantly affected in their adaptive immune responses (94.3%)
This group includes most of the inflammation affected tumors (395 out of 417
In contrast there are very few tumors without significant adaptive immune deregulation (36 out of 641 or 5.6% overall)
Also scarce resulted tumors with notorious inflammation but with no significant adaptive immunity changes (22 out of 417 or 5.3%)
intrinsically including immunosuppressive feed-back signaling to activated T cells
expression of IL-10 and PD-L1 genes by activated myeloid cells is supposed to inhibit adaptive T cell response
adaptive immune response comprises a variety of immunosuppressive events
eventually elicited by T cell subsets expressing specific markers
These events may be strongly associated to other relevant molecules in the inflammatory context
we have performed a generalized linear model (a form of logistic multivariate regression) for the association (membership) of the four groups of samples with the following results:
• FOXP3 expression is significantly associated (p-value = 0.0133
postive association) to adaptive immune response in breast tumors
• FOXP3 and GZMB expression are significantly associated (p-value = 2.57 E-5 for FOXP3 and 8.14E-11 for GZMB
both postive associations) to ‘adaptive immune response plus inflammation” in breast tumors
• The group with ‘no adaptive immune response nor inflammation” showed a discrete (although significant) negative association with FOXP3 expresion (p-value = 0.027)
in all tumors FOXP3 expression is highly significant
positively associated to GZMB expression levels (p-value = 2.0E-16)
This type of response is associated to virus or intracellular parasites
as well as transformed cancerous cells and culminates in the elimination of targeted cells
Modules in the network are enriched in processes of complementary biological functions
CCR5sm contains genes involved in antigen acquisition via receptor mediated phagocytosis
as well as a number of chemokines that mediate immune cell recruitment
PSMB9sm contains genes of components of the immunoproteasome and MHC-I molecules involved in the presentation of internally produced antigens
The immunoproteasome is induced by IFNγ signaling and is associated with a response to intracellular infections and transformation in tumor cells
HLA−DRAsm contains MHC-II genes involved in antigen presentation to CD4+ T lymphocytes
Other modules like IFI44Lsm also contain interferon-induced genes annotated with antiviral functions
CD2sm has genes involved in T lymphocyte function
including T cell receptor components and co-receptor molecule CD8A as well as other genes related to T cell cytotoxic function like perforin and granzymes
antitumor mechanisms coexist with tolerance mechanisms which impair tumor immune destruction
Our results suggest an active process of tolerance where cytotoxic CD8+ lymphocytes turn to anergic/memory cells that no longer fight the tumor
This is supported by the coregulation of CD8A and IL7R genes in CD2sm but not of CD8B
Other modules like IGLC2sm contain genes of immunoglobulin chains
including constant and variable chains that may be indicative of the presence of B lymphocyte infiltrates
Our dataset included samples from patients with developing tumors that received no neoadjuvant treatment
where type I inflammatory response is associated to good prognosis and tumor elimination
it seems paradoxical that a favorable immune response has been related to tumor growth
The cellular composition of breast cancer tissue includes cancerous cells as well as immune cell infiltrates
our subnetwork suggests the presence of phagocytic and antigen-presenting cells (i
by the presence of MHC class II in HLA−DRAsm and Fc receptors in CCR5sm) and T CD8 and CD4 cells (TCR components CD3D
as well as CD4 and CD28 correceptors in CXCR5sm)
These are indicative of antigen-specific immune responses
Primed cells are able to enter inflammed tissues and exert their effector functions when they encounter their specific antigen
In some circumstances effector functions can be minimized or suppressed in the presence of antigen
Tolerance to self-antigens is necessary to avoid autoimmune tissue destruction
while tolerance to antigens derived from food and microbiome components keeps inflammation at bay
tolerance may be part of the contributing factors of the pathology of chronic disease
Redmod and Sherman (60) proposed a model that explains how chronic antigen exposure can lead to persistence of anergic T CD8+ cells
strong signaling through the TCR eliminates many of the activated cells either throug IL7Rα receptor downregulation or a decrease in antiapoptotic molecules
strong TCR signaling in the surviving cells produces an increase in free calcium levels triggering anergy and a reduction in the Ras-ERK proapoptotic signaling
In our network CD8A and IL7R genes are coregulated in the CD2sm. IL7Rα and CD8αα are associated to the survival and development of memory CD8+ T cells (61, 62)
given that our expression matrix contains both CD8A and CD8B genes for the CD8α and CD8β subunits of the CD8 correceptor
This may point out to purely CD8αα signaling
which is hypothesized to exert a weaker TCR signaling response
Anergic CD8 T cells need to be exposed to antigen to maintain anergy
interactions and genes were obtained from a background that included the whole genome (gene set defined by the HGU133 plus2 platform) and the strength and ranking of the statistical dependencies between gene pairs was not known a priori
Only 76 out of a total of 942 genes in the network are annotated as part of the inflammatory response process
which represents 8% of the network gene count
Meanwhile 694 genes in the network are annotated as part of the immune response process
The whole network was constructed taking into account all inflammation-associated genes, the modular and submodular structure of this network groups specific functional processes for particular modules (Figure 4)
This could reflect the compartmentalization of immune response
activating sets of genes depending on the type of response that should be triggered
general modules could be active as a first response under cellular damage or an external influence
CCR5 and SPARC modules are associated to two different general cell processes: immunity (CCR5) and extracellular remodeling (SPARC)
Our interpretation here is that modules partially reflect cell types present in the tumor microenvironment and that are sampled as part of the biopsy
This is specially suggested in the CD2sm where a number of genes characteristic of CD8+ T lymphocytes are grouped together
the topology of modules in the network is strongly associated to specific and separated functions
Concomitantly, the interconnection between submodules inside the modules could be associated to fluxes of information between processes or cooperativity between modules. This is the case of CCR5sm and CD2sm. In Figures 3A,B it is possible to observe that the strongest link between submodules occurs in this pair
the number of common enriched processes between modules is the highest
Processes related to T-cell activation and adaptive immune response are shared between these two submodules
indicating possible cooperation mechanisms under the need to stimulate T-cell activity
Interestingly enough, ZFPM1 module, despite the fact that it contains 173 genes does not result statistically enriched for any biological process at our chosen significance threshold. This results remarkable since the belonging genes are not differentially expressed (white genes clustered in left side of Figure 2)
These genes may not be part of the global response that cell performs under an external stimulus
The results obtained from our network of inflammation-associated genes suggest that in primary
A possible mechanism being the induction of tolerance and anergization of these cells by persistent antigen exposure
This hypothesis is supported by the presence of modules in the network with genes that enrich processes and pathways related to antigen acquisition
as well as genes characteristic of CD8+ T effector cells
several kind of efforts must be achieved in order to understand the complex interplay between factors shaping cancerous phenotypes
the modular analysis of the network structure observed here
provides us with an alternative framework of the aforementioned interplay between specific modules that take account of particular biological processes that are activated in response to external stimuli
the observed results highlight the compartmentalized structure of co-regulated genes that may act and behave together in a well-defined time and space
prognostic and therapeutics for breast cancer
and contributed to the analysis of results
JE-E contributed to the analysis of results
All authors read and approved the final version of the manuscript
This work was supported by CONACYT (grant no
as well as by federal funding from the National Institute of Genomic Medicine (Mexico)
Additional support has been granted by the National Laboratory of Complexity Sciences (grant no
student from Programa de Maestría y Doctorado en Ciencias Bioquímicas
Universidad Nacional Autónoma de México (UNAM) and received a fellowship from CONACYT (grant no 742069/59691)
EH-L acknowledges additional support from the 2016 Marcos Moshinsky Fellowship in the Physical Sciences
Authors want to thak José María Zamora-Fuentes for his technical support and comments on the final version of this manuscript
The Supplementary Material for this article can be found online at: https://www.frontiersin.org/articles/10.3389/fimmu.2019.00056/full#supplementary-material
A text file containing the edge list or connectivity map for the gene regulatory network (a Cytoscape SIF file)
A text file with the definition of the modules and submodules for the largest component of the network (an Infomap MAP file)
A multi-page PDF file with heatmaps presenting gene signatures related to the expression of genes related to specific pathways in the adaptive immunity and inflammation groups of samples in our original dataset
A multi-page PDF file with heatmaps presenting gene signatures related to the expression of genes related to specific pathways in the adaptive immunity and inflammation groups of samples in the validation (TCGA) dataset
A multi-page PDF containing gene expression boxplots for relevant genes in the different groups of inflammatory response
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The magic which envelops every part of the Ribeira Sacra is most clearly represented in the variety of festivals celebrated in its different municipalities
Carnival and traditional trades and exalting wine and cuisine
are pilgrimages: festivals which began as religious and commercial celebrations and which are now excellent excuses to come together and enjoy food
Some of these celebrations have been declared Galician Festivals of Tourist Interest
such as the Feria do Viño de Amandi (Amandi Wine Fair) in Sober or the Folión de Carros(Cart Festival) in Chantada: a celebration dating back to the Middle Ages which represents the agricultural trades and work carried out in the area
The Festa das Fachas de Castelo (Castelo Torch Burning Festival) in Taboada has also been awarded this title
seeing locals and visitors build a large torch made of straw before its flames light up the night
we have compiled a list of the main festivals celebrated in the different municipalities of the Ribeira Sacra
Fiesta de la carne ao caldeiro (Stewed Beef Festival)
Fiestas de la Asunción (Assumption of Mary Festival)
Magosto de San Martiño (San Martiño Chestnut Festival)
Fiesta de la Ternera Gallega (Galician Beef Festival)
Fiesta de la cereza y del aceite (Cherry and Olive Oil Festival)
Feria del vino de Amandi (Amandi Wine Fair)
Fiesta del caldo de huesos (Bone Broth Festival)
Fiesta de las Fachas de Castelo(Castelo Torch Burning Festival)
The Local Europe ABVästmannagatan 43113 25 StockholmSweden
Storm Ivo to continue battering Spain on Thursday
Stormy and extremely windy weather has been almost constant this week
first with Storm Herminia and now with Storm Ivo
which on Thursday will continue to lash Spain with very strong winds
plenty of rain as well as snow at high altitudes
Galicia and the Basque Country are on red alert due to coastal storms
and the rest of the northern part of the country is on orange alert due to the strong gusts of wind
most of Spain including the Canary Islands will experience very windy weather on Thursday
and coastal areas can expect extremely choppy seas
The Ministry of Labour has reached an agreement with the unions to raise the minimum wage (SMI in Spanish) by 4.4 percent in 2025
This increase translates into €50 more per month
taking it up €1,184 per month in 14 payments (€16,576 gross per year)
The increase will benefit just over two million workers
representing around 12 percent of Spain's salaried population
according to estimates by leading trade union CCOO
Spain's top prosecutor denies leaking documents against opposition
Spain's top prosecutor has denied leaking legal documents about the partner of the Madrid region's influential conservative leader
in a case embarrassing Socialist Prime Minister Pedro Sanchez
Álvaro García Ortiz refused to answer anyone but his lawyer during a 90-minute testimony at the Supreme Court
in an appearance without precedent in Spanish legal history
against the Madrid region's leader Isabel Díaz Ayuso and is one of several affairs undermining the minority leftist administration
Spanish media published in March last year a draft agreement between the public prosecutor's office and the lawyer of businessman Alberto González Amador
who is under investigation for alleged tax fraud
Spanish economy shines in 2024 with 3.2% growth
The Spanish economy expanded 3.2 percent last year thanks to buoyant exports and consumption that have made it one of the fastest-growing developed countries
Spain has been consistently outstripping a mostly sluggish eurozone and the data published by the National Statistics Institute confirmed its standout performance with 0.8 percent growth in the final three months of 2024
The result slightly exceeded forecasts of 3.1 percent growth by the Bank of Spain and the International Monetary Fund
Exports in the European Union's fourth-largest economy grew three percent year-on-year in the final quarter of 2024 and household consumption increased 3.7 percent
The service sector continued to perform strongly from October to December with a jump of 3.9 percent year-on-year
which represents around 13 percent of the economy
has driven the sector as a record 94 million tourists flocked to the world's second most-visited country last year
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Graduation exercises for the Class of 2016 at Monroe High School were conducted on June 23 at Sun National Bank Center in Trenton
The class valedictoria was Kush Chandres Shah and the salutatorian was Raksha Dondapati
READ, LOOK and WATCH: More Class of 2016 graduation coverage
The following is the alphabetical list of 511 graduates:
The TimesAysha Frade’s last words to her husband were preserved in an unsent text message written moments before she died
She was texting as she walked across Westminster Bridge to pick up their two daughters
said: “On that day Aysha had called me at 2.30pm but I was on a conference call at work and I couldn’t pick up
give me a couple of minutes and I’ll call her back
“When I finished that call I heard this chatter about something’s happened in Westminster