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Identification of a CDH12 potential candidate genetic variant for an autosomal dominant form of transgrediens and progrediens palmoplantar keratoderma in a Tunisian family. J Hum Genet 2020; 65:397-410. [PMID: 31911611 DOI: 10.1038/s10038-019-0711-4] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/22/2019] [Revised: 11/29/2019] [Accepted: 12/01/2019] [Indexed: 01/10/2023]
Abstract
Molecular diagnosis of rare inherited palmoplantar keratoderma (PPK) is still challenging. We investigated at the clinical and genetic level a consanguineous Tunisian family presenting an autosomal dominant atypical form of transgrediens and progrediens PPK to better characterize this ultrarare disease and to identify its molecular etiology. Whole-exome sequencing (WES), filtering strategies, and bioinformatics analysis have been achieved. Clinical investigation and follow up over 13 years of this Tunisian family with three siblings formerly diagnosed as an autosomal recessive form of Mal de Melela-like conducted us to reconsider its initial phenotype. Indeed, the three patients presented clinical features that overlap both Mal de Meleda and progressive symmetric erythrokeratoderma (PSEK). The mode of inheritance was also reconsidered, since the mother, initially classified as unaffected, exhibited a similar expression of the disease. WES analysis showed the absence of potentially functional rare variants in known PPKs or PSEK-related genes. Results revealed a novel heterozygous nonsynonymous variant in cadherin-12 gene (CDH12, NM_004061, c.1655C > A, p.Thr552Asn) in all affected family members. This variant is absent in dbSNP and in 50 in-house control exomes. In addition, in silico analysis of the mutated 3D domain structure predicted that this variant would result in cadherin-12 protein destabilization and thermal instability. Functional annotation and biological network construction data provide further supporting evidence for the potential role of CDH12 in the maintenance of skin integrity. Taken together, these results suggest that CDH12 gene is a potential candidate gene for an atypical presentation of an autosomal dominant form of transgrediens and progrediens PPK.
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Catunda R, Rekhi U, Clark D, Levin L, Febbraio M. Downregulation von Loricrin und epitheliale Erkrankungen: ein systematischer Überblick. J Dtsch Dermatol Ges 2019; 17:1227-1238. [PMID: 31885179 DOI: 10.1111/ddg.14001_g] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/04/2018] [Accepted: 06/19/2019] [Indexed: 11/30/2022]
Affiliation(s)
- Raisa Catunda
- School of Dentistry, Faculty of Medecine and Dentistry, University of Alberta
| | - Umar Rekhi
- School of Dentistry, Faculty of Medecine and Dentistry, University of Alberta
| | - Danielle Clark
- School of Dentistry, Faculty of Medecine and Dentistry, University of Alberta
| | - Liran Levin
- School of Dentistry, Division of Periodontology, Faculty of Medecine and Dentistry, University of Alberta
| | - Maria Febbraio
- School of Dentistry, Faculty of Medecine and Dentistry, University of Alberta
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Catunda R, Rekhi U, Clark D, Levin L, Febbraio M. Loricrin downregulation and epithelial-related disorders: a systematic review. J Dtsch Dermatol Ges 2019; 17:1227-1238. [PMID: 31846220 DOI: 10.1111/ddg.14001] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/04/2018] [Accepted: 06/19/2019] [Indexed: 12/15/2022]
Abstract
Loricrin downregulation has been associated with age-related changes as well as inherited and inflammatory skin diseases. We hypothesize that changes in loricrin could be more related to altered barrier function and consequently disorders that affect epithelial cells, such as psoriasis, atopic dermatitis (AD), erythrokeratoderma, loricrin keratoderma (LK) and periodontitis. The aim of this review is to summarize what is known about the association between loricrin downregulation and epithelial-related disorders (ERDs). A search was performed on the following databases: Medline, Cochrane Library, PubMed, EMBASE, Lilacs, Scopus and Google Scholar, resulting in 16 included articles. Loricrin keratoderma was the ERD most frequently associated with loricrin mutations (730insG, 709insC and 578insG; 5/7 cases - 71.44 %). Atopic dermatitis was the ERD most frequently associated with loricrin downregulation (2/7 cases - 28.6 %). Mutilating palmoplantar keratoderma, progressive symmetrical erythrokeratoderma and a new type of erythrokeratoderma were not associated with any mutations. At the gene level, periodontitis patients showed the highest decrease (-6.89x), followed by AD (-6.5x) and psoriasis patients (-0.5x). In summary, loricrin mutation and downregulation were associated with several ERDs. The diversity in disease presentation is likely related to whether there is a total loss of loricrin, mislocalization and/or if the mutant form of loricrin causes dysfunction of other proteins and/or changes in cornification.
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Affiliation(s)
- Raisa Catunda
- School of Dentistry, Faculty of Medecine and Dentistry, University of Alberta, Edmonton, Alberta, Canada
| | - Umar Rekhi
- School of Dentistry, Faculty of Medecine and Dentistry, University of Alberta, Edmonton, Alberta, Canada
| | - Danielle Clark
- School of Dentistry, Faculty of Medecine and Dentistry, University of Alberta, Edmonton, Alberta, Canada
| | - Liran Levin
- School of Dentistry, Division of Periodontology, Faculty of Medecine and Dentistry, University of Alberta
| | - Maria Febbraio
- School of Dentistry, Faculty of Medecine and Dentistry, University of Alberta, Edmonton, Alberta, Canada
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Mahajan VK, Khatri G, Chauhan PS, Mehta KS, Raina R, Gupta M. Progressive Symmetric Erythrokeratoderma Having Overlapping Features With Erythrokeratoderma Variabilis and Lesional Hypertrichosis: Is Nomenclature "Erythrokeratoderma Variabilis Progressiva" More Appropriate? Indian J Dermatol 2015; 60:410-1. [PMID: 26288417 PMCID: PMC4533547 DOI: 10.4103/0019-5154.160499] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/10/2023] Open
Affiliation(s)
- Vikram K Mahajan
- Department of Dermatology, Venereology and Leprosy, Dr. R. P. Government Medical College, Kangra, Tanda, Himachal Pradesh, India
| | - Gayatri Khatri
- Department of Dermatology, Venereology and Leprosy, Dr. R. P. Government Medical College, Kangra, Tanda, Himachal Pradesh, India
| | - Pushpinder S Chauhan
- Department of Dermatology, Venereology and Leprosy, Dr. R. P. Government Medical College, Kangra, Tanda, Himachal Pradesh, India
| | - Karaninder S Mehta
- Department of Dermatology, Venereology and Leprosy, Dr. R. P. Government Medical College, Kangra, Tanda, Himachal Pradesh, India
| | - Rashmi Raina
- Department of Pathology, Dr. R. P. Government Medical College, Kangra, Tanda, Himachal Pradesh, India. E-mail:
| | - Mrinal Gupta
- Department of Dermatology, Venereology and Leprosy, Dr. R. P. Government Medical College, Kangra, Tanda, Himachal Pradesh, India
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Dominant De Novo Mutations in GJA1 Cause Erythrokeratodermia Variabilis et Progressiva, without Features of Oculodentodigital Dysplasia. J Invest Dermatol 2014; 135:1540-1547. [PMID: 25398053 PMCID: PMC4430428 DOI: 10.1038/jid.2014.485] [Citation(s) in RCA: 40] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/25/2014] [Revised: 10/15/2014] [Accepted: 10/27/2014] [Indexed: 12/20/2022]
Abstract
Genetic investigation of inherited skin disorders has informed understanding of skin self-renewal, differentiation, and barrier function. Erythrokeratodermia variabilis et progressiva (EKVP) is a rare, inherited skin disease characterized by transient figurate patches of erythema, localized or generalized scaling, and frequent palmoplantar keratoderma. By employing exome sequencing, we show that de novo missense mutations in GJA1 (gap junction protein alpha 1) cause EKVP. The severe, progressive skin disease in EKVP subjects with GJA1 mutations is distinct from limited cutaneous findings rarely found in the systemic disorder oculodentodigital dysplasia, also caused by dominant GJA1 mutations. GJA1 encodes connexin 43 (Cx43), the most widely expressed gap junction protein. We show that the GJA1 mutations in EKVP subjects lead to disruption of Cx43 membrane localization, and aggregation within the Golgi. These findings reveal a critical role for Cx43 in epidermal homeostasis, and provide evidence of organ-specific pathobiology resulting from different mutations within GJA1.
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Chen WH, Chiang CP, Chen JF, Wang WM, Wu BY. Symmetrical erythematosquamous figurate plaques in a young man. Clin Exp Dermatol 2014; 39:850-1. [PMID: 25196651 DOI: 10.1111/ced.12418] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 03/16/2014] [Indexed: 11/29/2022]
Affiliation(s)
- W-H Chen
- Department of Dermatology, Tri-Service General Hospital, National Defence Medical Center, Taipei, Taiwan
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Zhou F, Fu H, Liu L, Cui Y, Zhang Z, Chang R, Yue Z, Yang S, Zhang X. No exonic mutations at GJB2, GJB3, GJB4, GJB6, ARS (Component B), and LOR genes responsible for a Chinese patient affected by progressive symmetric erythrokeratodermia with pseudoainhum. Int J Dermatol 2014; 53:1111-3. [PMID: 24962725 DOI: 10.1111/ijd.12494] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
OBJECTIVE Progressive symmetric erythrokeratodermia (PSEK) is characterized by symmetric and growing erythematous hyperkeratotic patches over the body shortly after birth, particularly trunk and limbs, the buttocks, and the face, sometimes together with palmoplantar keratoderma (PPK). The GJB2, GJB3, GJB4, GJB6, ARS (Component B), and LOR gene mutation might contribute to PSEK manifestation. This study aimed to identify sequence alteration of these genes in a Chinese PSEK patient with pseudoainhum. METHODS Genomic DNA was purified from the patient's peripheral blood. Mutation analysis of target genes was performed by direct sequencing using ABI 3730 sequencer RESULTS No exonic mutations was identified in the aforementioned genes. CONCLUSIONS The result underlines the genetic heterogeneity of PSEK and other related erythrokeratodermas.
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Affiliation(s)
- Fusheng Zhou
- Institute of Dermatology and Department of Dermatology at No. 1 Hospital, Anhui Medical University, Hefei, Anhui, China; Department of Dermatology and Venereology, Anhui Medical University, Hefei, Anhui, China; State Key Laboratory of Dermatology Incubation, Ministry of Science and Technology, Hefei, Anhui, China
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Verma SB, Wollina U. Progressive symmetric erythrokeratodermia with delayed intellectual milestones and convulsions. Indian Dermatol Online J 2012; 3:54-6. [PMID: 23130266 PMCID: PMC3481936 DOI: 10.4103/2229-5178.93502] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022] Open
Abstract
Progressive symmetric erythrokeratoderma is an uncommon genodermatosis and is thought to arise due to mutations in the connexin gene, however, genetic heterogenicity has been described. Very few cases of neurological involvement have been described in this unusual entity. We report a case of progressive symmetric erythrokeratoderma, with convulsions and delayed intellectual milestones.
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Affiliation(s)
- Shyam B Verma
- Nirvana Skin Clinic, Makarpura Road, Vadodara, Gujarat, India
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