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Kosykh AV, Ryumina II, Botkina AS, Evtushenko NA, Zhigmitova EB, Martynova AA, Gurskaya NG, Rebrikov DV. EBS in Children with De Novo Pathogenic Variants Disturbing Krt14. Int J Mol Sci 2024; 25:2989. [PMID: 38474236 DOI: 10.3390/ijms25052989] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/11/2024] [Revised: 02/19/2024] [Accepted: 02/28/2024] [Indexed: 03/14/2024] Open
Abstract
Epidermolysis bullosa simplex (EBS) is a dermatological condition marked by skin fragility and blister formation resulting from separation within the basal layer of the epidermis, which can be attributed to various genetic etiologies. This study presents three pathogenic de novo variants in young children, with clinical manifestations appearing as early as the neonatal period. The variants contribute to the EBS phenotype through two distinct mechanisms: direct keratin abnormalities due to pathogenic variants in the Krt14 gene, and indirect effects via pathogenic mutation in the KLHL24 gene, which interfere with the natural proteasome-mediated degradation pathway of KRT14. We report one severe case of EBS with mottled pigmentation arising from the Met119Thr pathogenic variant in KRT14, another case involving a pathogenic KLHL24 Met1Val variant, and a third case featuring the hot spot mutation Arg125His in KRT14, all manifesting within the first few weeks of life. This research underscores the complexity of genetic influences in EBS and highlights the importance of early genetic screening for accurate diagnosis and management.
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Affiliation(s)
- Anastasiya V Kosykh
- Center for Precision Genome Editing and Genetic Technologies for Biomedicine, Pirogov Russian National Research Medical University, Ostrovityanova 1, Moscow 117997, Russia
| | - Irina I Ryumina
- National Medical Research Center for Obstetrics, Gynecology and Perinatology named after Academician V. I. Kulakov, ul Akademika Oparina, 4, Moscow 117997, Russia
| | - Alexandra S Botkina
- Department of Dermatovenereology, Russian Children's Clinical Hospital, Pirogov Russian National Research Medical University, Leninsky Prospekt, 117, k3, Moscow 119571, Russia
| | - Nadezhda A Evtushenko
- Center for Precision Genome Editing and Genetic Technologies for Biomedicine, Pirogov Russian National Research Medical University, Ostrovityanova 1, Moscow 117997, Russia
| | - Elena B Zhigmitova
- Center for Precision Genome Editing and Genetic Technologies for Biomedicine, Pirogov Russian National Research Medical University, Ostrovityanova 1, Moscow 117997, Russia
| | - Aleksandra A Martynova
- Center for Precision Genome Editing and Genetic Technologies for Biomedicine, Pirogov Russian National Research Medical University, Ostrovityanova 1, Moscow 117997, Russia
| | - Nadya G Gurskaya
- Center for Precision Genome Editing and Genetic Technologies for Biomedicine, Pirogov Russian National Research Medical University, Ostrovityanova 1, Moscow 117997, Russia
| | - Denis V Rebrikov
- Center for Precision Genome Editing and Genetic Technologies for Biomedicine, Pirogov Russian National Research Medical University, Ostrovityanova 1, Moscow 117997, Russia
- National Medical Research Center for Obstetrics, Gynecology and Perinatology named after Academician V. I. Kulakov, ul Akademika Oparina, 4, Moscow 117997, Russia
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Jiang X, Zhu Y, Sun H, Gu F. A Novel Mutation p.L461P in KRT5 Causing Localized Epidermolysis Bullosa Simplex. Ann Dermatol 2020; 33:11-17. [PMID: 33911807 PMCID: PMC7875216 DOI: 10.5021/ad.2021.33.1.11] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/02/2020] [Revised: 05/29/2020] [Accepted: 06/17/2020] [Indexed: 11/08/2022] Open
Abstract
Background Epidermolysis bullosa (EB) is a rare genetic disease with widely different clinical manifestations, but the relationship between genotype and phenotype is not fully understood. In the present study, we recruited a Chinese family in which two members had been diagnosed with localized EB simplex (EBS), with clinical manifestation, including blisters and erosions on the soles of the feet since infancy. Objective To identify and confirm the genetic variation in a Chinese family diagnosed as localized EBS. Methods Our study included two patients, other healthy members of the family, and 100 normal controls. Genomic DNA samples were isolated from each participant, and then polymerase chain reaction (PCR) direct sequencing was performed. Results The results of PCR direct sequencing revealed a novel heterozygous missense mutation in codon 461 of exon 7 of KRT5 (c.1382T>C), which led to an amino acid change (p.L461P) in the patients with EBS but was absent in unaffected family members and 100 unrelated control samples. Conclusion The present study broadens the mutational spectrum of EBS, and this knowledge could be harnessed for prenatal screening, gene diagnosis, and gene therapy for localized EBS.
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Affiliation(s)
- Xin Jiang
- Department of Dermatology, Tongling People's Hospital, Anhui, China
| | - Yingyu Zhu
- Department of Dermatology, Tongling People's Hospital, Anhui, China
| | - Huihui Sun
- State Key Laboratory of Ophthalmology, Optometry and Vision Science, Wenzhou Medical University, Wenzhou, China.,Genetic Disease Center, School of Ophthalmology & Optometry and Eye Hospital, Wenzhou Medical University, Wenzhou, China
| | - Feng Gu
- State Key Laboratory of Ophthalmology, Optometry and Vision Science, Wenzhou Medical University, Wenzhou, China.,Genetic Disease Center, School of Ophthalmology & Optometry and Eye Hospital, Wenzhou Medical University, Wenzhou, China
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Lalor L, Titeux M, Palisson F, Fuentes I, Yubero MJ, Tasanen K, Huilaja L, Has C, Tadini G, Haggstrom AN, Hovnanian A, Lucky AW. Epidermolysis bullosa simplex-generalized severe type due to keratin 5 p.Glu477Lys mutation: Genotype-phenotype correlation and in silico modeling analysis. Pediatr Dermatol 2019; 36:132-138. [PMID: 30515866 DOI: 10.1111/pde.13722] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 01/29/2023]
Abstract
BACKGROUND/OBJECTIVES Epidermolysis bullosa is a group of diseases caused by mutations in skin structural proteins. Availability of genetic sequencing makes identification of causative mutations easier, and genotype-phenotype description and correlation are important. We describe six patients with a keratin 5 mutation resulting in a glutamic acid to lysine substitution at position 477 (p.Glu477Lys) who have a distinctive, severe and sometimes fatal phenotype. We also perform in silico modeling to show protein structural changes resulting in instability. METHODS In this case series, we collected clinical data from six patients with this mutation identified from their national or local epidermolysis bullosa databases. We performed in silico modeling of the keratin 5-keratin 14 coil 2B complex using CCBuilder and rendered with Pymol (Schrodinger, LLC, New York, NY). RESULTS Features include aplasia cutis congenita, generalized blistering, palmoplantar keratoderma, onychodystrophy, airway and developmental abnormalities, and a distinctive reticulated skin pattern. Our in silico model of the keratin 5 p.Glu477Lys mutation predicts conformational change and modification of the surface charge of the keratin heterodimer, severely impairing filament stability. CONCLUSIONS Early recognition of the features of this genotype will improve care. In silico analysis of mutated keratin structures provides useful insights into structural instability.
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Affiliation(s)
- Leah Lalor
- Division of Pediatric Dermatology, MCW Department of Dermatology, Milwaukee, Wisconsin
| | - Matthias Titeux
- Laboratory of Genetic Skin Diseases, Inserm UMR1163, Imagine Institute, Paris, France.,University Paris Descartes - Sorbonne Paris Cite, Paris, France
| | - Francis Palisson
- Fundacion DEBRA Chile, Santiago, Chile.,Facultad de Medicina, Clinica Alemana Universidad del Desarrollo, Santiago, Chile
| | - Ignacia Fuentes
- Fundacion DEBRA Chile, Santiago, Chile.,Centro de Genetica y Genomica, Facultad de Medicina, Clinica Alemana Universidad del Desarrollo, Santiago, Chile
| | - María J Yubero
- Fundacion DEBRA Chile, Santiago, Chile.,Facultad de Medicina, Clinica Alemana Universidad del Desarrollo, Santiago, Chile
| | - Kaisa Tasanen
- Department of Dermatology, Pedego Research Unit, Oulu Center for Cell-Matrix Research, MRC Oulu, University of Oulu and Oulu University Hospital, Oulu, Finland
| | - Laura Huilaja
- Department of Dermatology, Pedego Research Unit, Oulu Center for Cell-Matrix Research, MRC Oulu, University of Oulu and Oulu University Hospital, Oulu, Finland
| | - Cristina Has
- Department of Dermatology, Medical Center - University of Freiburg, Freiburg, Germany
| | - Gianluca Tadini
- Pediatric Dermatology, Fondazione IRCC Ca'Granda - Ospedale Maggiore Policlinico di Milano, Milan, Italy
| | - Anita N Haggstrom
- Department of Dermatology and Pediatrics, Indiana University, Indianapolis, Indiana
| | - Alain Hovnanian
- Laboratory of Genetic Skin Diseases, Inserm UMR1163, Imagine Institute, Paris, France.,University Paris Descartes - Sorbonne Paris Cite, Paris, France
| | - Anne W Lucky
- Epidermolysis Bullosa Center, Cincinnati Children's Hospital Medical Center, Cincinnati, Ohio
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4
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Wally V, Hovnanian A, Ly J, Buckova H, Brunner V, Lettner T, Ablinger M, Felder TK, Hofbauer P, Wolkersdorfer M, Lagler FB, Hitzl W, Laimer M, Kitzmüller S, Diem A, Bauer JW. Diacerein orphan drug development for epidermolysis bullosa simplex: A phase 2/3 randomized, placebo-controlled, double-blind clinical trial. J Am Acad Dermatol 2018; 78:892-901.e7. [DOI: 10.1016/j.jaad.2018.01.019] [Citation(s) in RCA: 34] [Impact Index Per Article: 5.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/30/2017] [Revised: 12/21/2017] [Accepted: 01/14/2018] [Indexed: 12/22/2022]
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5
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Banerjee S, Wu Q, Ying Y, Li Y, Shirota M, Neculai D, Li C. In silico predicted structural and functional insights of all missense mutations on 2B domain of K1/K10 causing genodermatoses. Oncotarget 2016; 7:52766-52780. [PMID: 27421141 PMCID: PMC5288147 DOI: 10.18632/oncotarget.10599] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/30/2016] [Accepted: 05/17/2016] [Indexed: 12/02/2022] Open
Abstract
The K1 and K10 associated genodermatoses are characterized by clinical symptoms of mild to severe redness, blistering and hypertrophy of the skin. In this paper, we set out to computationally investigate the structural and functional effects of missense mutations on the 2B domain of K1/K10 heterodimer and its consequences in disease phenotype. We modeled the structure of the K1/K10 heterodimer based on crystal structures for the human homolog K5/K14 heterodimer, and identified that the missense mutations exert their effects on stability and assembly competence of the heterodimer by altering physico-chemical properties, interatomic interactions, and inter-residue atomic contacts. Comparative structural analysis between all the missense mutations and SNPs showed that the location and physico-chemical properties of the substituted amino acid are significantly correlated with phenotypic variations. In particular, we find evidence that a particular SNP (K10, p.E443K) is a pathogenic nsSNP which disrupts formation of the hydrophobic core and destabilizes the heterodimer through the loss of interatomic interactions. Our study is the first comprehensive report analyzing the mutations located on 2B domain of K1/K10 heterodimeric coiled-coil complex.
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Affiliation(s)
- Santasree Banerjee
- Department of Cell Biology and Medical Genetics, School of Medicine, Zhejiang University, Hangzhou, China
- BGI-Shenzhen, Shenzhen, China
| | - Qian Wu
- Department of Cell Biology and Medical Genetics, School of Medicine, Zhejiang University, Hangzhou, China
| | - Yuyi Ying
- Department of Cell Biology and Medical Genetics, School of Medicine, Zhejiang University, Hangzhou, China
| | - Yanni Li
- Department of Cell Biology and Medical Genetics, School of Medicine, Zhejiang University, Hangzhou, China
| | - Matsuyuki Shirota
- Department of Applied Information Sciences, Graduate School of Information Sciences, Tohoku University, Sendai, Japan
| | - Dante Neculai
- Department of Cell Biology and Medical Genetics, School of Medicine, Zhejiang University, Hangzhou, China
| | - Chen Li
- Department of Cell Biology and Medical Genetics, School of Medicine, Zhejiang University, Hangzhou, China
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6
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Kopečková L, Bučková H, Kýrová J, Gaillyová R, Němečková J, Jeřábková B, Veselý K, Stehlíková K, Fajkusová L. Ten years of DNA diagnostics of epidermolysis bullosa in the Czech Republic. Br J Dermatol 2016; 174:1388-91. [PMID: 26707537 DOI: 10.1111/bjd.14370] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- L Kopečková
- Centre of Molecular Biology and Gene Therapy, University Hospital Brno and Masaryk University, Brno, Czech Republic
| | - H Bučková
- Department of Pediatric Dermatology, Pediatric Clinic, University Hospital Brno and Masaryk University, Brno, Czech Republic
| | - J Kýrová
- Department of Pediatric Dermatology, Pediatric Clinic, University Hospital Brno and Masaryk University, Brno, Czech Republic
| | - R Gaillyová
- Department of Medical Genetics, University Hospital Brno and Masaryk University, Brno, Czech Republic
| | - J Němečková
- Department of Medical Genetics, University Hospital Brno and Masaryk University, Brno, Czech Republic.,Department of Public Health, Faculty of Medicine, University Hospital Brno and Masaryk University, Brno, Czech Republic
| | - B Jeřábková
- Centre of Molecular Biology and Gene Therapy, University Hospital Brno and Masaryk University, Brno, Czech Republic
| | - K Veselý
- First Department of Pathological Anatomy, Faculty of Medicine, Masaryk University and St. Anne's University Hospital, Brno, Czech Republic
| | - K Stehlíková
- Centre of Molecular Biology and Gene Therapy, University Hospital Brno and Masaryk University, Brno, Czech Republic
| | - L Fajkusová
- Centre of Molecular Biology and Gene Therapy, University Hospital Brno and Masaryk University, Brno, Czech Republic.,Laboratory of Functional Genomics and Proteomics, NCBR, Faculty of Science, Masaryk University, Brno, Czech Republic.,Central European Institute of Technology, Masaryk University, Brno, Czech Republic
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7
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Tan TS, Ng YZ, Badowski C, Dang T, Common JEA, Lacina L, Szeverényi I, Lane EB. Assays to Study Consequences of Cytoplasmic Intermediate Filament Mutations: The Case of Epidermal Keratins. Methods Enzymol 2016; 568:219-53. [PMID: 26795473 DOI: 10.1016/bs.mie.2015.09.030] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/06/2022]
Abstract
The discovery of the causative link between keratin mutations and a growing number of human diseases opened the way for a better understanding of the function of the whole intermediate filament families of cytoskeleton proteins. This chapter describes analytical approaches to identification and interpretation of the consequences of keratin mutations, from the clinical and diagnostic level to cells in tissue culture. Intermediate filament pathologies can be accurately diagnosed from skin biopsies and DNA samples. The Human Intermediate Filament Database collates reported mutations in intermediate filament genes and their diseases, and can help clinicians to establish accurate diagnoses, leading to disease stratification for genetic counseling, optimal care delivery, and future mutation-aligned new therapies. Looking at the best-studied keratinopathy, epidermolysis bullosa simplex, the generation of cell lines mimicking keratinopathies is described, in which tagged mutant keratins facilitate live-cell imaging to make use of today's powerful enhanced light microscopy modalities. Cell stress assays such as cell spreading and cell migration in scratch wound assays can interrogate the consequences of the compromised cytoskeletal network. Application of extrinsic stresses, such as heat, osmotic, or mechanical stress, can enhance the differentiation of mutant keratin cells from wild-type cells. To bring the experiments to the next level, 3D organotypic human cultures can be generated, and even grafted onto the backs of immunodeficient mice for greater in vivo relevance. While development of these assays has focused on mutant K5/K14 cells, the approaches are often applicable to mutations in other intermediate filaments, reinforcing fundamental commonalities in spite of diverse clinical pathologies.
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Affiliation(s)
| | | | | | - Tram Dang
- Institute of Medical Biology, Singapore
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8
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Wertheim-Tysarowska K, Ołdak M, Giza A, Kutkowska-Kaźmierczak A, Sota J, Przybylska D, Woźniak K, Śniegórska D, Niepokój K, Sobczyńska-Tomaszewska A, Rygiel AM, Płoski R, Bal J, Kowalewski C. Novel sporadic and recurrent mutations in KRT5 and KRT14 genes in Polish epidermolysis bullosa simplex patients: further insights into epidemiology and genotype-phenotype correlation. J Appl Genet 2015; 57:175-81. [PMID: 26432462 PMCID: PMC4830863 DOI: 10.1007/s13353-015-0310-9] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/11/2015] [Revised: 07/26/2015] [Accepted: 08/12/2015] [Indexed: 12/25/2022]
Abstract
Epidermolysis bullosa simplex (EBS) is a hereditary genodermatosis characterised by trauma-induced intraepidermal blistering of the skin. EBS is mostly caused by mutations in the KRT5 and KRT14 genes. Disease severity partially depends on the affected keratin type and may be modulated by mutation type and location. The aim of our study was to identify the molecular defects in KRT5 and KRT14 in a cohort of 46 Polish and one Belarusian probands with clinical suspicion of EBS and to determine the genotype-phenotype correlation. The group of 47 patients with clinical recognition of EBS was enrolled in the study. We analysed all coding exons of KRT5 and KRT14 using Sanger sequencing. The pathogenic status of novel variants was evaluated using bioinformatical tools, control group analysis (DNA from 100 healthy population-matched subjects) and probands' parents testing. We identified mutations in 80 % of patients and found 29 different mutations, 11 of which were novel and six were found in more than one family. All novel mutations were ascertained as pathogenic. In the majority of cases, the most severe genotype was associated with mutations in highly conserved regions. In some cases, different inheritance mode and clinical significance, than previously reported by others, was observed. We report 11 novel variants and show novel genotype-phenotype correlations. Our data give further insight into the natural history of EBS molecular pathology, epidemiology and mutation origin.
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Affiliation(s)
- K Wertheim-Tysarowska
- Department of Medical Genetics, Institute of Mother and Child, Kasprzaka 17a, 01211, Warsaw, Poland.
| | - M Ołdak
- Department of Histology and Embryology, Center of Biostructure Research, Medical University of Warsaw, Chalubinskiego 5, 02004, Warsaw, Poland.,Department of Genetics, World Hearing Center, Institute of Physiology and Pathology of Hearing, Warsaw, Poland
| | - A Giza
- Department of Medical Genetics, Institute of Mother and Child, Kasprzaka 17a, 01211, Warsaw, Poland
| | - A Kutkowska-Kaźmierczak
- Department of Medical Genetics, Institute of Mother and Child, Kasprzaka 17a, 01211, Warsaw, Poland
| | - J Sota
- Department of Medical Genetics, Institute of Mother and Child, Kasprzaka 17a, 01211, Warsaw, Poland
| | - D Przybylska
- Department of Histology and Embryology, Center of Biostructure Research, Medical University of Warsaw, Chalubinskiego 5, 02004, Warsaw, Poland
| | - K Woźniak
- Department of Dermatology and Immunodermatology, Medical University of Warsaw, Chalubinskiego 5, 02004, Warsaw, Poland
| | - D Śniegórska
- Department of Medical Genetics, Institute of Mother and Child, Kasprzaka 17a, 01211, Warsaw, Poland
| | - K Niepokój
- Department of Medical Genetics, Institute of Mother and Child, Kasprzaka 17a, 01211, Warsaw, Poland
| | - A Sobczyńska-Tomaszewska
- Department of Medical Genetics, Institute of Mother and Child, Kasprzaka 17a, 01211, Warsaw, Poland
| | - A M Rygiel
- Department of Medical Genetics, Institute of Mother and Child, Kasprzaka 17a, 01211, Warsaw, Poland
| | - R Płoski
- Department of Genetics, Medical University of Warsaw, Pawińskiego 5a, 02004, Warsaw, Poland
| | - J Bal
- Department of Medical Genetics, Institute of Mother and Child, Kasprzaka 17a, 01211, Warsaw, Poland
| | - C Kowalewski
- Department of Dermatology and Immunodermatology, Medical University of Warsaw, Chalubinskiego 5, 02004, Warsaw, Poland
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9
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Medeiros GX, Riet-Correa F. Epidermolysis bullosa in animals: a review. Vet Dermatol 2014; 26:3-13, e1-2. [PMID: 25354580 DOI: 10.1111/vde.12176] [Citation(s) in RCA: 25] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 07/01/2014] [Indexed: 11/30/2022]
Abstract
Epidermolysis bullosa (EB) is a hereditary mechanobullous disease of animals and humans, characterized by an extreme fragility of the skin and mucous membranes. The main feature of EB in humans and animals is the formation of blisters and erosions in response to minor mechanical trauma. Epidermolysis bullosa is caused by mutations in the genes that code for structural proteins of the cytoskeleton of the basal keratinocytes or of the basement membrane zone. Based on the ultrastructural levels of tissue separation, EB is divided into the following three broad categories: epidermolysis bullosa simplex, junctional epidermolysis bullosa and dystrophic epidermolysis bullosa. Human types of EB are divided into several subtypes based on their ultrastructural changes and the mode of inheritance; subtypes are not fully established in animals. In humans, it is estimated that EB affects one in 17,000 live births; the frequency of EB in different animals species is not known. In all animal species, except in buffalo with epidermolysis bullosa simplex, multifocal ulcers are observed on the gums, hard and soft palates, mucosa of the lips, cheek mucosa and dorsum of the tongue. Dystrophic or absent nails, a frequent sign seen in human patients with EB, corresponds to the deformities and sloughing of the hooves in ungulates and to dystrophy or atrophy of the claws in dogs and cats. This review covers aspects of the molecular biology, diagnosis, classification, clinical signs and pathology of EB reported in animals.
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Affiliation(s)
- Gildenor X Medeiros
- Postgraduate Program in Veterinary Medicine, Veterinary Hospital, Federal University of Campina Grande, Patos, Paraíba, CEP 58708-110, Brazil
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10
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Zhang Y, Chen Y, Yu J, Liu G, Huang Z. Integrated transcriptome analysis reveals miRNA–mRNA crosstalk in laryngeal squamous cell carcinoma. Genomics 2014; 104:249-56. [DOI: 10.1016/j.ygeno.2014.06.004] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/30/2014] [Revised: 06/19/2014] [Accepted: 06/23/2014] [Indexed: 11/26/2022]
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11
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Jankowski M, Wertheim-Tysarowska K, Jakubowski R, Sota J, Nowak W, Czajkowski R. NovelKRT14mutation causing epidermolysis bullosa simplex with variable phenotype. Exp Dermatol 2014; 23:684-7. [DOI: 10.1111/exd.12478] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 06/18/2014] [Indexed: 12/20/2022]
Affiliation(s)
- Marek Jankowski
- Department of Dermatology, Sexually Transmitted Diseases and Immunodermatology; Nicolaus Copernicus University; Bydgoszcz Poland
| | | | - Rafal Jakubowski
- Department of Biophysics and Medical Physics; Institute of Physics; Nicolaus Copernicus University; Torun Poland
| | - Justyna Sota
- Department of Medical Genetics; Institute of Mother and Child; Warsaw Poland
| | - Wieslaw Nowak
- Department of Biophysics and Medical Physics; Institute of Physics; Nicolaus Copernicus University; Torun Poland
| | - Rafal Czajkowski
- Department of Dermatology, Sexually Transmitted Diseases and Immunodermatology; Nicolaus Copernicus University; Bydgoszcz Poland
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12
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Zeng K, Duan Y, Liang YH. Novel Ala94Thr mutation of keratin 14 in epidermolysis bullosa simplex. Int J Dermatol 2014; 53:e466-8. [PMID: 25040198 DOI: 10.1111/ijd.12594] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
Affiliation(s)
- Kang Zeng
- Department of Dermatology, Nanfang Hospital, Southern Medical University, Guangzhou, Guangdong, China
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13
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Banerjee S, Wu Q, Yu P, Qi M, Li C. In silico analysis of all point mutations on the 2B domain of K5/K14 causing epidermolysis bullosa simplex: a genotype–phenotype correlation. MOLECULAR BIOSYSTEMS 2014; 10:2567-77. [DOI: 10.1039/c4mb00138a] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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14
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The Pathogenetic Role of IL-1β in Severe Epidermolysis Bullosa Simplex. J Invest Dermatol 2013; 133:1901-3. [DOI: 10.1038/jid.2013.31] [Citation(s) in RCA: 37] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
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15
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Schumann H, Roth W, Has C, Volz A, Erfurt-Berge C, Magin TM, Bruckner-Tuderman L. Verrucous carcinoma in epidermolysis bullosa simplex is possibly associated with a novel mutation in the keratin 5 gene. Br J Dermatol 2012; 167:929-36. [PMID: 22639907 DOI: 10.1111/j.1365-2133.2012.11075.x] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/25/2023]
Abstract
Epidermolysis bullosa simplex (EBS) is mainly caused by mutations in the KRT5 and KRT14 genes. Squamous cell carcinoma (SCC) represents the second most frequent skin neoplasia with complex aetiology. The molecular events disrupting the orchestrated interplay between the cytoskeleton, cell adhesion molecules and signalling proteins are ill understood in SCC. We describe the molecular background and the unusual course of the disease in a patient with EBS Dowling-Meara, severe keratoderma and a massive verrucous carcinoma. Skin and tumour samples from the patient were analysed using light microscopy, immunohistochemistry and immunofluorescence mapping. Mutation analysis of the KRT5 and KRT14 genes identified the novel KRT5 mutation p.E477D. Invasive tumour areas were characterized by downregulation of keratins 5 and 14, reduced and irregular desmocollin-2 expression and increased expression of keratins 6, 16 and 17. Levels of Ki-67 were increased and levels of E-cadherin strongly reduced in the tumour tissue. In this case a novel KRT5 mutation led to increased fragility of keratinocytes. Desmosome and adherens junctions were destabilized, which may trigger keratinocyte-mediated inflammation, possibly via p120-catenin-dependent signalling, suggesting a link between a keratin mutation and SCC, which adds weight to the hypothesis that disturbance of the cytoskeleton represents a major cause in the appearance of the malignant phenotype. Some individuals with EBS may be at risk of developing secondary SCC.
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Affiliation(s)
- H Schumann
- Department of Dermatology, University Medical Center, Freiburg, Germany.
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García M, Santiago JL, Terrón A, Hernández-Martín A, Vicente A, Fortuny C, De Lucas R, López JC, Cuadrado-Corrales N, Holguín A, Illera N, Duarte B, Sánchez-Jimeno C, Llames S, García E, Ayuso C, Martínez-Santamaría L, Castiglia D, De Luca N, Torrelo A, Mechan D, Baty D, Zambruno G, Escámez MJ, Del Río M. Two novel recessive mutations in KRT14 identified in a cohort of 21 Spanish families with epidermolysis bullosa simplex. Br J Dermatol 2012; 165:683-92. [PMID: 21623745 DOI: 10.1111/j.1365-2133.2011.10428.x] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
Abstract
BACKGROUND Basal epidermolysis bullosa simplex (EBS) is a group of blistering genodermatoses mostly caused by mutations in the keratin genes, KRT5 and KRT14. Recessive mutations represent about 5% of all EBS mutations, being common and specific in populations with high consanguinity, where affected patients show severe phenotypes. OBJECTIVES To accomplish the first mutational analysis in patients of Spanish origin with EBS and to delineate a comprehensive genotype-phenotype correlation. METHODS Twenty-one EBS families were analysed. Immunofluorescence mapping at the dermoepidermal junction level was performed on skin biopsies from patients. Mutation screening of the entire coding sequences of KRT5 and KRT14 in genomic DNA was assessed by polymerase chain reaction and direct sequencing. RESULTS KRT5 or KRT14 causative mutations were identified in 18 of the 21 EBS families. A total of 14 different mutations were disclosed, of which 12 were dominant missense mutations and two truncating recessive mutations. Five of the 14 mutations were novel including three dominant in KRT5 (p.V186E, p.T321P and p.A428T) and two recessive in KRT14 (p.K116X and p.K250RfsX8). The two patients with EBS carrying homozygous recessive mutations were affected by severe phenotypes and belonged to consanguineous families. All five families with the EBS Dowling-Meara subtype carried recurrent mutations affecting the highly conserved ends of the α-helical rod domain of K5 and K14. The seven mutations associated with the localized EBS subtype were widely distributed along the KRT5 and KRT14 genes. Two families with mottled pigmentation carried the P25L mutation in KRT5, commonly associated with this subtype. CONCLUSIONS This study further confirms the genotype-phenotype correlation established for EBS in other ethnic groups, and is the first in a Mediterranean country (excluding Israel). This study adds two novel recessive mutations to the worldwide record to date, which includes a total of 14 mutations. As in previous reports, the recessive mutations resulted in a lack of keratin K14, giving rise to a generalized and severe presentation.
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Affiliation(s)
- M García
- Regenerative Medicine Unit, Epithelial Biomedicine Division, Basic Research Department, Centro de Investigaciones Energéticas, Medioambientales y Tecnológicas, Av. Complutense 22, 28040 Madrid, Spain
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Park MK, Lee HJ, Shin J, Noh M, Kim SY, Lee CH. Novel participation of transglutaminase-2 through c-Jun N-terminal kinase activation in sphingosylphosphorylcholine-induced keratin reorganization of PANC-1 cells. Biochim Biophys Acta Mol Cell Biol Lipids 2011; 1811:1021-9. [PMID: 21840417 DOI: 10.1016/j.bbalip.2011.07.007] [Citation(s) in RCA: 37] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/07/2011] [Revised: 07/03/2011] [Accepted: 07/09/2011] [Indexed: 01/07/2023]
Abstract
Sphingosylphosphorylcholine (SPC) is found at increased levels in the malignant ascites of tumor patients and induces perinuclear reorganization of keratin 8 (K8) filaments that contribute to the viscoelasticity of metastatic cancer cells. In this study, we investigated the role and molecular mechanisms of Tgase-2 in SPC-induced K8 phosphorylation and perinuclear reorganization in PANC-1 cells (PAN(WT)), and in PANC-1 cells that stably expressed shTgase-2 or Tgase-2 (PAN(shTg2) and PAN(Tg2)). SPC induces the expression of Tgase-2 in a time- and dose-dependent manner. Gene silencing of Tgase-2 or cystamine suppressed the SPC-induced phosphorylation and perinuclear reorganization of K8 and suppressed the SPC-induced migration of PANC-1 cells. An inhibitor of c-Jun N-terminal kinase (JNK), SP600125, suppressed the SPC-induced phosphorylation of serine 431 in K8 and keratin reorganization. Next, we examined the effect of Tgase-2 on JNK activation of serine 431 phosphorylation in K8. Tgase-2 gene silencing suppressed the expression of active form JNK (pJNK). Constitutive or tetracyclin-induced conditional expression of Tgase-2 increased the levels of pJNK. Tgase-2 was coimmunoprecipitated with K8 and JNK. In addition, K8 was coimmunoprecipitated with Tgase-2 and JNK. JNK was also coimmunoprecipitated with K8 and Tgase-2. Overall, these results suggest that Tgase-2 is involved in SPC-induced phosphorylation and perinuclear reorganization of K8 by activating JNK and forming a triple complex with K8 and JNK. Therefore, SPC-induced Tgase-2 might be a new target for modulating keratin reorganization, metastasis of cancer cells and JNK activation.
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Affiliation(s)
- Mi Kyung Park
- College of Pharmacy, Dongguk University, Seoul, Korea
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Bolling MC, Lemmink HH, Jansen GHL, Jonkman MF. Mutations in KRT5 and KRT14 cause epidermolysis bullosa simplex in 75% of the patients. Br J Dermatol 2011; 164:637-44. [PMID: 21375516 DOI: 10.1111/j.1365-2133.2010.10146.x] [Citation(s) in RCA: 37] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
BACKGROUND Epidermolysis bullosa simplex (EBS) is a mechanobullous genodermatosis that may be caused by mutations in the genes KRT5 and KRT14 encoding the basal epidermal keratins 5 (K5) and 14 (K14). Three main clinical subtypes of EBS exist, differing in onset, distribution and severity of skin blistering. Previous reports of KRT5 and KRT14 mutations suggest a correlation between the location of the mutation and the severity of the associated EBS phenotype. OBJECTIVES The prevalence of KRT5/KRT14 mutations and the genotype-phenotype correlation in the largest tissue-confirmed EBS population is investigated. METHODS KRT5 and KRT14 genomic DNA and cDNA sequences of 76 clinically well-defined unrelated EBS probands were amplified and then subjected to direct sequencing and product length analysis. Immunofluorescence microscopy on patients' skin biopsies with antibodies against K5 and K14 was performed to study protein expression. RESULTS In 57 of 76 (75%) probands 41 different KRT5 and KRT14 mutations were identified, of which 12 were novel. Mutations affecting the highly conserved helix boundary motifs of the rod domains of K5 and K14, and the K14 helix initiation motif in particular, were associated with the severest, EBS Dowling-Meara, phenotype. In 21 EBS probands (37%) the mutation was de novo. In 19 probands (25%) KRT5 or KRT14 mutations were excluded. CONCLUSIONS The phenotype-genotype correlation observed in this large EBS population underscores the importance of helix boundary motifs for keratin assembly. Only three-quarters of biopsy-confirmed EBS probands have KRT5 or KRT14 mutations, indicating genetic heterogeneity in EBS. Alternative gene candidates are discussed.
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Affiliation(s)
- M C Bolling
- Center for Blistering Diseases, Department of Dermatology, University Medical Center Groningen, the Netherlands.
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Boralevi F. [What's new in paediatric dermatology?]. Ann Dermatol Venereol 2011; 137 Suppl 4:S145-57. [PMID: 21193118 DOI: 10.1016/s0151-9638(10)70041-7] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
Abstract
This paper summarizes a review of the medical literature focused on the field of pediatric dermatology from December 2009 to November 2010. Our objective was to select the papers published in the main journals of dermatology, internal medicine, pediatrics, infectious diseases and allergy that bring new information and significant advances concerning skin diseases in children. Recent advances in the field of infantile hemangiomas and atopic dermatitis are particularly detailed. This review also covers the main the following topics: psoriasis, Kawasaki disease, head lice and warts management, lichen, rare diseases such as epidermolyses bullosae.
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Affiliation(s)
- F Boralevi
- Unité de dermatologie pédiatrique, Hôpital Pellegrin-enfant, Place Amélie Raba-Léon, 33076 Bordeaux cedex, France.
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