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Li Y, Tang L, Han Y, Zheng L, Zhen Q, Yang S, Gao M. Genetic Analysis of KRT9 Gene Revealed Previously Known Mutations and Genotype-Phenotype Correlations in Epidermolytic Palmoplantar Keratoderma. Front Genet 2019; 9:645. [PMID: 30666268 PMCID: PMC6330350 DOI: 10.3389/fgene.2018.00645] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/12/2018] [Accepted: 11/29/2018] [Indexed: 11/13/2022] Open
Abstract
Epidermolytic palmoplantar keratoderma (EPPK, OMIM 144200) is an autosomal dominant inherited disease, clinically characterized by diffuse yellowish thickening of the skin on the palms and soles, usually with erythematous borders developing during the first weeks or months after birth. Pathogenesis of EPPK is determined by mutations in the keratin gene (KRT9). Thirty three mutations in the KRT9 gene from 100 EPPK families have been identified. Among these, 23 mutations are located in the 1A region (a mutation hot spot region), 7 are located in the 2B region, and the remaining 3 are synonymous mutations. In this study, three heterozygous mutations (p.N161S, p.R163W, and p.R163Q), located in regions of the gene encoding the conserved central a-helix rod domain, were detected in the KRT9 gene of the three large Chinese families. This study confirms that codon 163 (48 of 100 cases) is a hot spot mutation site for KRT9. Additional findings identified p.N161S (4%) and p.R163W (4%) as potential hot spot mutations for EPPK associated with knuckle pads, and p.R163Q (15 of 100 cases) as the hot spot mutation of EPPK not occurring in combination with knuckle pads. In conjunction with future studies, this research may help lay the foundation for genetics counseling, prenatal diagnosis and clinical treatment of EPPK.
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Affiliation(s)
- Yuwei Li
- Institute of Dermatology and Department of Dermatology of First Affiliated Hospital, Hefei, China.,Key Laboratory of Dermatology, Ministry of Education, Anhui Medical University, Hefei, China
| | - Lili Tang
- Institute of Dermatology and Department of Dermatology of First Affiliated Hospital, Hefei, China.,Key Laboratory of Dermatology, Ministry of Education, Anhui Medical University, Hefei, China
| | - Yang Han
- Institute of Dermatology and Department of Dermatology of First Affiliated Hospital, Hefei, China.,Key Laboratory of Dermatology, Ministry of Education, Anhui Medical University, Hefei, China
| | - Liyun Zheng
- Institute of Dermatology and Department of Dermatology of First Affiliated Hospital, Hefei, China.,Key Laboratory of Dermatology, Ministry of Education, Anhui Medical University, Hefei, China
| | - Qi Zhen
- Institute of Dermatology and Department of Dermatology of First Affiliated Hospital, Hefei, China.,Key Laboratory of Dermatology, Ministry of Education, Anhui Medical University, Hefei, China
| | - Sen Yang
- Institute of Dermatology and Department of Dermatology of First Affiliated Hospital, Hefei, China
| | - Min Gao
- Institute of Dermatology and Department of Dermatology of First Affiliated Hospital, Hefei, China
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Fukunaga Y, Kubo A, Sasaki T, Tsuruta D, Fukai K. Novel KRT9 missense mutation in a Japanese case of epidermolytic palmoplantar keratoderma. J Dermatol 2017; 45:e72-e73. [PMID: 29068086 DOI: 10.1111/1346-8138.14115] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Yoshie Fukunaga
- Department of Dermatology, Osaka City University Graduate School of Medicine, Osaka, Japan
| | - Akiharu Kubo
- Department of Dermatology, Keio University School of Medicine, Tokyo, Japan
| | - Takashi Sasaki
- Center for Supercentenarian Medical Research, Keio University School of Medicine, Tokyo, Japan
| | - Daisuke Tsuruta
- Department of Dermatology, Osaka City University Graduate School of Medicine, Osaka, Japan
| | - Kazuyoshi Fukai
- Department of Dermatology, Osaka City University Graduate School of Medicine, Osaka, Japan
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Liang YH, Liu QX, Huang L, Zeng K. A recurrent p.M157R mutation of keratin 9 gene in a Chinese family with epidermolytic palmoplantar keratoderma and literature review. Int J Dermatol 2014; 53:e375-9. [PMID: 24899405 DOI: 10.1111/ijd.12352] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
Affiliation(s)
- Yanhua H Liang
- Department of Dermatology, Nanfang Hospital, Southern Medical University, Guangzhou, Guangdong, 510515, China.
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Ke HP, Jiang HL, Lv YS, Huang YZ, Liu RR, Chen XL, Du ZF, Luo YQ, Xu CM, Fan QH, Zhang XN. KRT9 gene mutation as a reliable indicator in the prenatal molecular diagnosis of epidermolytic palmoplantar keratoderma. Gene 2014; 546:124-8. [PMID: 24862219 DOI: 10.1016/j.gene.2014.05.048] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/16/2013] [Revised: 04/23/2014] [Accepted: 05/22/2014] [Indexed: 11/18/2022]
Abstract
Epidermolytic palmoplantar keratoderma (EPPK) is the most frequent form of such keratodermas. It is inherited in an autosomal dominant pattern and is clinically characterized by diffuse yellowish thickening of the skin on the palms and soles with erythematous borders during the first weeks or months after birth. EPPK is generally caused by mutations of the KRT9 gene. More than 26 KRT9 gene mutations responsible for EPPK have been described (Human Intermediate Filament Database, www.interfil.org), and many of these variants are located within the highly-conserved coil 1A region of the α-helical rod domain of keratin 9. Unfortunately, there is no satisfactory treatment for EPPK. Thus, prenatal molecular diagnosis or pre-pregnancy diagnosis is crucial and benefits those affected who seek healthy descendants. In the present study, we performed amniotic fluid-DNA-based prenatal testing for three at-risk pregnant EPPK women from three unrelated southern Chinese families who carried the KRT9 missense mutations p.Arg163Trp and p.Arg163Gln, and successfully helped two families to bear normal daughters. We suggest that before the successful application of preimplantation genetic diagnosis (PGD), and noninvasive prenatal diagnosis of EPPK that analyzes fetal cells or cell-free DNA in maternal blood, prenatal genetic diagnosis by amniocentesis or chorionic villus sampling (CVS) offers a quite acceptable option for EPPK couples-at-risk to avoid the birth of affected offspring, especially in low- and middle-income countries.
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Affiliation(s)
- Hai-Ping Ke
- Department of Biology, Ningbo College of Health Sciences, Ningbo, Zhejiang Province 315100, China; Department of Cell Biology and Medical Genetics, Research Center of Molecular Medicine, National Education Base for Basic Medical Sciences, Institute of Cell Biology, Zhejiang University School of Medicine, Hangzhou, Zhejiang Province 310058, China
| | - Hu-Ling Jiang
- Department of Cell Biology and Medical Genetics, Research Center of Molecular Medicine, National Education Base for Basic Medical Sciences, Institute of Cell Biology, Zhejiang University School of Medicine, Hangzhou, Zhejiang Province 310058, China
| | - Ya-Su Lv
- Department of Cell Biology and Medical Genetics, Research Center of Molecular Medicine, National Education Base for Basic Medical Sciences, Institute of Cell Biology, Zhejiang University School of Medicine, Hangzhou, Zhejiang Province 310058, China
| | - Yi-Zhou Huang
- Department of Cell Biology and Medical Genetics, Research Center of Molecular Medicine, National Education Base for Basic Medical Sciences, Institute of Cell Biology, Zhejiang University School of Medicine, Hangzhou, Zhejiang Province 310058, China
| | - Rong-Rong Liu
- Department of Cell Biology and Medical Genetics, Research Center of Molecular Medicine, National Education Base for Basic Medical Sciences, Institute of Cell Biology, Zhejiang University School of Medicine, Hangzhou, Zhejiang Province 310058, China
| | - Xiao-Ling Chen
- Department of Cell Biology and Medical Genetics, Research Center of Molecular Medicine, National Education Base for Basic Medical Sciences, Institute of Cell Biology, Zhejiang University School of Medicine, Hangzhou, Zhejiang Province 310058, China
| | - Zhen-Fang Du
- Department of Cell Biology and Medical Genetics, Research Center of Molecular Medicine, National Education Base for Basic Medical Sciences, Institute of Cell Biology, Zhejiang University School of Medicine, Hangzhou, Zhejiang Province 310058, China
| | - Yu-Qin Luo
- Key Laboratory of Reproductive Genetics (Zhejiang), Ministry of Education, and Centre of Reproductive Medicine, Women's Hospital, Zhejiang University School of Medicine, Hangzhou, Zhejiang Province 310006, China
| | - Chen-Ming Xu
- Key Laboratory of Reproductive Genetics (Zhejiang), Ministry of Education, and Centre of Reproductive Medicine, Women's Hospital, Zhejiang University School of Medicine, Hangzhou, Zhejiang Province 310006, China
| | - Qi-Hui Fan
- Department of Gynaecology and Obstetrics, Ningbo Women and Children's Hospital, Ningbo, Zhejiang Province 315012, China
| | - Xian-Ning Zhang
- Department of Cell Biology and Medical Genetics, Research Center of Molecular Medicine, National Education Base for Basic Medical Sciences, Institute of Cell Biology, Zhejiang University School of Medicine, Hangzhou, Zhejiang Province 310058, China.
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