Volume 11 - 2020 | https://doi.org/10.3389/fimmu.2020.00641
This article is part of the Research TopicAutoinflammatory Keratinization Disease (AiKD)View all 5 articles
Keratosis linearis with ichthyosis congenita and sclerosing keratoderma (KLICK) syndrome is a rare autosomal recessive skin disorder characterized by palmoplantar keratoderma
and numerous papules distributed linearly in the arm folds and on the wrists
the affected skin shows hypertrophy and hyperplasia of the spinous
and horny epidermal layers with mild infiltration of inflammatory cells in the upper dermis
There are 14 patients with KLICK syndrome described in the literature
and they all carry the same nucleotide deletion
is an ubiquitously expressed protein that functions as a chaperone for proteasome maturation
KLICK syndrome is caused by a reduction in POMP levels that leads to proteasome insufficiency in differentiating keratinocytes
It is noteworthy that POMP is also known to be the causative gene for proteasome-associated autoinflammatory syndrome-2 (PRAAS2)
It is considered that the disrupted proteasome assembly caused by the POMP mutation might lead to both skin inflammation and then hyperkeratosis in KLICK syndrome
Inflammation caused by the hyperactivation of innate immunity occasionally leads to inflammatory diseases of the skin
recently denoted as autoinflammatory keratinization diseases (AiKDs)
We propose that KLICK syndrome caused by the specific 1-bp nucleotide deletion mutation in the regulatory region of POMP might be in a spectrum of proteasome-associated phenotypes
Autoinflammatory keratinization disease (AiKD) is an umbrella term recently introduced to describe inflammatory keratinization diseases caused by mutations in single genes associated with autoinflammatory diseases (6, 7). AiKDs are genetically heterogeneous, and their different subtypes show various clinical features, complications, and prognoses (8–11)
We propose that KLICK syndrome associated with the POMP mutation be categorized as an AiKD
Although the proposed mechanism of diseases is different (haploinsufficiency vs
the clinical inflammatory phenotype of PRAID is similar to that of PRAAS
PRAID has been considered as the proteasome-associated autoinflammatory syndrome-2 (PRAAS2
Comparison of two syndromes associated with POMP mutations
several distinct phenotypes resulting from the different mutations in NLRP1 have been reported
Although phenotype/genotype correlations are still unclear
the pathogenesis of these skin inflammatory diseases is linked to gain of function in the NLRP1 inflammasome
The suggestive pathogenesis of keratosis linearis with ichthyosis congenita and sclerosing keratoderma (KLICK) syndrome as an autoinflammatory keratinization disease (AiKD)
effective therapies will be established for patients with KLICK syndrome in the near future based on an understanding of the molecular pathogenesis of KLICK syndrome
further clinical and laboratory investigations for the diagnosis and treatment of KLICK are needed
TT and MA contributed conception and design of the study and read and approved the submitted version
TT wrote the first draft of the manuscript
This work was supported by Grant-in-Aid for Scientific Research (B) 18H02832 to MA and by Grant-in-Aid for Young Scientists 18K16058 to TT from the Japan Society for the Promotion of Science (JSPS)
This work was also supported by funding from Advanced Research and Development Programs for Medical Innovation (AMED-CREST) 19gm0910002h0105 to MA
This research was supported by AMED under Grant Numbers JP19ek0109281 and JP19ek0109295
The authors thank JSID's Fellowship Shiseido Research Grant 2019
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
The Supplementary Material for this article can be found online at: https://www.frontiersin.org/articles/10.3389/fimmu.2020.00641/full#supplementary-material
autoinflammatory keratinization diseases; ER
keratosis linearis with ichthyosis congenita and sclerosing keratoderma; PG
proteasome-associated autoinflammatory syndrome; PRAID
POMP-related autoinflammation and immune dysregulation disease; UPR
Keratosis linearis with ichthyosis congenita and sclerosing keratoderma (KLICK-syndrome): a rare
autosomal recessive disorder of keratohyaline formation
A single-nucleotide deletion in the POMP 5′ UTR causes a transcriptional switch and altered epidermal proteasome distribution in KLICK genodermatosis
KLICK syndrome: recognizable phenotype and hot-spot POMP mutation
Autoinflammatory keratinization diseases: An emerging concept encompassing various inflammatory keratinization disorders of the skin
Familial or sporadic porokeratosis as an autoinflammatory keratinization disease
A novel NCSTN missense mutation in the signal peptide domain causes hidradenitis suppurativa
which has features characteristic of an autoinflammatory keratinization disease
Aberrant CARD14 function might cause defective barrier formation
Pityriasis rubra pilaris type V as an autoinflammatory disease by CARD14 mutations
Congenital ichthyosiform dermatosis with linear keratotic flexural papules and sclerosing palmoplantar keratoderma
CrossRef Full Text | Google Scholar
[Keratosis linearis with ichthyosis congenita and sclerosing keratoderma (KLICK syndrome)]
Heterozygous truncating variants in POMP escape nonsense-mediated decay and cause a unique immune dysregulatory syndrome
Immuno- and constitutive proteasome crystal structures reveal differences in substrate and inhibitor specificity
Crosstalk and interplay between the ubiquitin-proteasome system and autophagy
Immunoproteasomes preserve protein homeostasis upon interferon-induced oxidative stress
siRNA silencing of proteasome maturation protein (POMP) activates the unfolded protein response and constitutes a model for KLICK genodermatosis
recognition and activation of the misfolded protein degradation pathways through macroautophagy and the proteasome
Unfolded protein response in keratinocytes: impact on normal and abnormal keratinization
Insights into the role of endoplasmic reticulum stress in skin function and associated diseases
Additive loss-of-function proteasome subunit mutations in CANDLE/PRAAS patients promote type I IFN production
PSMB8 encoding the beta5i proteasome subunit is mutated in joint contractures
and panniculitis-induced lipodystrophy syndrome
Nakajo-Nishimura syndrome: an autoinflammatory disorder showing pernio-like rashes and progressive partial lipodystrophy
Proteasome assembly defect due to a proteasome subunit beta type 8 (PSMB8) mutation causes the autoinflammatory disorder
CANDLE Syndrome As a Paradigm of Proteasome-Related Autoinflammation
the last immunoproteasome gene missing for PRAAS
IFN-gamma-induced immune adaptation of the proteasome system is an accelerated and transient response
A proteasome-related gene between the two ABC transporter loci in the class II region of the human MHC
Germline NLRP1 mutations cause skin inflammatory and cancer susceptibility syndromes via inflammasome activation
A new autoinflammatory and autoimmune syndrome associated with NLRP1 mutations: NAIAD (NLRP1-associated autoinflammation with arthritis and dyskeratosis)
Homozygous NLRP1 gain-of-function mutation in siblings with a syndromic form of recurrent respiratory papillomatosis
Exome sequencing identifies MVK mutations in disseminated superficial actinic porokeratosis
Gamma-secretase gene mutations in familial acne inversa
An integrated approach to unravel hidradenitis suppurativa etiopathogenesis
Hidradenitis suppurativa as an autoinflammatory keratinization disease
Autoinflammation in pyoderma gangrenosum and its syndromic form (pyoderma gangrenosum
and suppurative hidradenitis (PASH) shares genetic and cytokine profiles with other autoinflammatory diseases
ASK1/2 signaling promotes inflammation in a mouse model of neutrophilic dermatosis
Alteration in the gene encoding protein tyrosine phosphatase nonreceptor type 6 (PTPN6/SHP1) may contribute to neutrophilic dermatoses
Spontaneous insertion of a b2 element in the ptpn6 gene drives a systemic autoinflammatory disease in mice resembling neutrophilic dermatosis in humans
RIP1-driven autoinflammation targets IL-1alpha independently of inflammasomes and RIP3
An IL-17-dominant immune profile is shared across the major orphan forms of ichthyosis
Ichthyosis molecular fingerprinting shows profound TH17 skewing and a unique barrier genomic signature
Infliximab therapy for Netherton syndrome: A case report
Generalized pustular psoriasis: clinical management and update on autoinflammatory aspects
Revised nomenclature and classification of inherited ichthyoses: results of the First Ichthyosis Consensus Conference in Soreze 2009
Cross-sectional survey on disease severity in Japanese patients with harlequin ichthyosis/ichthyosis: Syndromic forms and quality-of-life analysis in a subgroup
Proteostasis control by the unfolded protein response
CrossRef Full Text | Google Scholar
Protein misfolding and dysregulated protein homeostasis in autoinflammatory diseases and beyond
Keywords: autoinflammatory keratinization diseases
keratosis linearis with ichthyosis congenita and sclerosing keratoderma syndrome
Citation: Takeichi T and Akiyama M (2020) KLICK Syndrome Linked to a POMP Mutation Has Features Suggestive of an Autoinflammatory Keratinization Disease
Received: 22 August 2019; Accepted: 20 March 2020; Published: 30 April 2020
Copyright © 2020 Takeichi and Akiyama. 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: Takuya Takeichi, dGFrZWljaGlAbWVkLm5hZ295YS11LmFjLmpw; Masashi Akiyama, bWFraXlhbWFAbWVkLm5hZ295YS11LmFjLmpw
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After an investment of EUR 1.5 million which came entirely from the funds of the National Salt Company
the largest saltwater swimming pool in Romania was opened on June 28 in Praid
The facility has 5,200 sqm of which the pools measure 1,942 sqm
and which interconnect with the 1.20 to 1.60m deep pool for adults
via a canal fitted with a crossover bridge
said head of the Praid Salt Mine Tourism Service Ilie Colorian for Agerpres newswire
”We have 300 deckchairs in the sunbathing area and along the pools, a cafeteria, two outdoor bars — one downstairs, another on the first floor — and a pool bar. There are sunbathing areas both on the ground floor and on the first floor. The total capacity is of 520 seats. We have 40 employees, including lifeguards and medical personnel,” the head of the Praid Salt Mine Tourism Service explained for Agerpres.
According to the director of the Praid salt mine
said a feasibility study has already been completed for the construction of a four-star hotel
but that plans also include fitting out a camping area and the separation of the underground leisure area from that intended for patients who come here to treat various respiratory diseases
The hotel will cost around EUR 15 million and funding will also come from European funds
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An IT engineer who downloaded thousands of indecent images of children from the dark web and took hundreds of pictures using a hidden camera has been jailed for ten years
National Crime Agency investigators arrested Daniel Praid
outside his home in Biggleswade in Bedfordshire on March 27 last year
and on a computer inside the property they found more than 300,000 indecent images and around 15,000 indecent films
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The pictures were taken in a variety of places but included images of women and girls getting changed and in the bathroom
with one image showing how Praid had used a plastic cleaning fluid bottle to conceal his camera
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Chat logs recovered from his hard drive revealed he had been sharing some of the indecent images online with other individuals
Praid admitted 28 different charges including making and distributing indecent images of children
At Birmingham Crown Court on Tuesday 15 March he was sentenced to ten years in prison
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NCA branch commander Paul Risby said: “We have identified and spoken to number of the victims of Praid’s voyeurism – they are all horrified at the violation of their privacy
“Praid amassed hundreds of thousands of indecent images from the dark web
some showing children being abused in the worst ways imaginable
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"Sofia Pride" 2024 is the biggest event in the protection of human rights in Bulgaria
The focus of this year's edition is the role of LGBTI+ people in Bulgaria for the development of modern Bulgarian society
The scene of "Sofia Pride" again gives young artists from the community the opportunity to perform and sing in front of thousands
together with some of the biggest stars of Bulgarian music
"Sofia Pride" is held for the 17th year in a row
understanding of the community's problems is growing
a large part of the problems of LGBTI+ people in Bulgaria remain unsolved
Foremost among these is the legal regulation of same-sex partnerships
which continues to be a focus in the work of those involved in community issues in the coming years
transgender and intersex people (LGBTI) have always been part of society
these groups have been subjected to various forms and degrees of oppression - from rejection by the people closest to them
through religious stigmatization and pseudoscientific medicalization of "otherness" them
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unnoticed by those who do not belong to any of these groups
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not simply by treating them equally regardless of their sexual orientation or gender identity
but by accepting by society and improving the lives of people who live with all kinds of queer identities
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empowering them to be who they would feel happy to be
as generated public debate and attacked the mechanisms of oppression expressed in prejudice and discrimination
pride reveals the LGBTI communities as a legitimate part of society - Bulgarian voters and taxpayers
who have the need and right to present their problems to the empowered and demand their resolution
The necessary changes in state policy towards LGBTI minorities are within the competence of the legislative and executive powers
Among them are recognition of the higher public danger of crimes committed on the basis of sexual orientation and gender identity or gender expression
by introducing into the Penal Code qualified compositions for acts committed with such motives
The organizers are fighting to strengthen the guarantees of protection against discrimination and protection against other violations of fundamental human rights through the signing and ratification by Bulgaria of Protocol No
16 to the European Convention for the Protection of Human Rights and Fundamental Freedoms
They insist on effective prevention and fight against domestic and gender-based violence in relation to all victims without exception
including victims in the families of same-sex couples
as well as bringing Bulgarian legislation in line with the best international standards in this field
clear and clearly articulated political declarations from the political parties represented in parliament
condemning hate speech based on sexual orientation or gender identity and declaring a commitment to work together with vulnerable communities of LGBTI people on the problems and violations of fundamental rights of these communities documented by national and international human rights organizations
Another struggle of Pride is the introduction of a clear
maximally simplified and financially accessible administrative procedure for changing the civil sex by the civil status authorities
as well as inclusion in the curricula of general education subjects in the school education system of current and scientific information concerning LGBTI people
there was also a procession of the traditional Christian family
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but also in the enormous consequences of industrialization
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The last events from Turkey and some European cities made Romanians think about domestic holidays
The online reservations portal HotelGuru.ro registered this year a growth in the number of accommodation options searches in the summer destinations
Based on these searches, HotelGuru.ro made a list of the most appreciated beaches and swimming pools from Romania. The top of the most searched resorts include seaside resorts such as Mamaia or Eforie Nord, but also balneo resorts, such as Sovata, Praid and Baile Herculane.
In June and July most of the Romanian tourists chose Mamaia resort
Transylvania was also a chosen destination because of the swimming pools and SPA centers from this region
Among the most popular destination from this year are the Praid swimming pool
Colibita and the North West Termal Park from Satu Mare
The main sports activities practiced by the tourists from Transylvania were cycling and mountain hiking, while the water sports lover chose rafting or kayak. The accommodation in these area start from RON 60/person/night.
the centre of the Salt Region in Transylvania
the Praid Wellness Center reopens this week
The year-round facility offers an extensive array of services to guests
The newly opening Wellness Center offers a saltwater pool, a freshwater pool, a children’s pool, two jacuzzis and a sauna area for guests, Termál Online reports
which is owned by the municipality of Praid
It is mainly used to treat musculoskeletal and articular problems
It was estimated at the time that the works would take two to three months
meaning that even in the worst-case scenario they could reopen for the end-of-year holidays
unexpected defects were found during the works
There were also serious structural problems
with some columns requiring structural reinforcement
this was probably due to the fact that the saltwater had eroded many of the building elements over the years
Promised to reopen in February at the beginning of the year
The Wellness Center in Praid is opening again on Saturday
“Indoor pools in spacious enclosed areas are open all year round for those who prefer a healthy lifestyle and those who want to recover,” the Wellness Center’s official website reads
The spa’s greatest treasure is its thermal water
which comes from a depth of 1,000 metres and is stored in a 10×20-metre pool
The beneficial effects of the saltwater can be experienced by those suffering from musculoskeletal and joint problems
but it is also recommended for skin diseases
gynaecological problems and respiratory diseases
you can find additional services in a spacious area of almost 1000 sqm:
The recommended bathing time is 20-30 minutes
which can be repeated 2-3 times with at least 20-minute breaks
A full-price day ticket costs RON 120 (EUR 24)
while a discounted day ticket costs RON 90 (EUR 18)
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