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Spindler J, Koller S, Graf U, Berger W, Gerth-Kahlert C, Blaser F. Macular Corneal Dystrophy - Molecular Genetics as the Key in Treatment-Refractory Keratopathy. Klin Monbl Augenheilkd 2024; 241:398-401. [PMID: 38653268 DOI: 10.1055/a-2219-8288] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 04/25/2024]
Affiliation(s)
- Jan Spindler
- Department of Ophthalmology, University Hospital Zurich, Zurich, Switzerland
| | - Samuel Koller
- Institute of Medical Molecular Genetics, University of Zurich, Schlieren, Switzerland
| | - Urs Graf
- Institute of Medical Molecular Genetics, University of Zurich, Schlieren, Switzerland
- Aktuelle Adresse: Labordiagnostic St. Gallen West AG, 9015 St. Gallen
| | - Wolfgang Berger
- Institute of Medical Molecular Genetics, University of Zurich, Schlieren, Switzerland
- Zurich Center for Integrative Human Physiology (ZIHP), University of Zurich, Zurich, Switzerland
- Zentrum für Neurowissenschaften (ZNZ), University and ETH Zurich, Zurich, Switzerland
| | | | - Frank Blaser
- Department of Ophthalmology, University Hospital Zurich, Zurich, Switzerland
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Huang Y, Yuan L, Cao Y, Tang R, Xu H, Tang Z, Deng H. Novel compound heterozygous mutations in the CHST6 gene cause macular corneal dystrophy in a Han Chinese family. ANNALS OF TRANSLATIONAL MEDICINE 2021; 9:622. [PMID: 33987320 PMCID: PMC8106006 DOI: 10.21037/atm-20-7178] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Indexed: 01/07/2023]
Abstract
BACKGROUND Macular corneal dystrophy (MCD), a rare autosomal recessive disorder, is caused by pathogenic mutations in the carbohydrate sulfotransferase 6 gene (CHST6) and is characterized by bilateral progressive stromal clouding and vision loss. Corneal transplantation is often necessary. This study aimed to identify disease-causing mutations in a Han-Chinese MCD patient. METHODS A 37-year-old female diagnosed with MCD was recruited. The clinical materials were observed and described, and peripheral blood sample was extracted. Whole exome sequencing (WES) and Sanger sequencing were used to reveal genetic defects. The pathogenicity of identified mutations was assessed using in silico analysis. RESULTS The patient had typical features of MCD, including decreased vision, multiple irregular gray-white corneal opacities, and corneal thinning. A novel nonsense mutation c.544C>T (p.Gln182Ter) and a validated missense mutation c.631C>G (p.Arg211Gly) were identified in the CHST6 gene coding region, both classified as "pathogenic" following the American College of Medical Genetics and Genomics standards and guidelines. CONCLUSIONS This study reports a Han-Chinese MCD patient with a novel nonsense mutation c.544C>T (p.Gln182Ter) and a recurrent missense mutation c.631C>G (p.Arg211Gly), which expand the spectrum of genetic mutations. The results of this study extend genotype-phenotype correlations between the CHST6 gene mutations and MCD clinical findings, contributing to a more accurate diagnosis and the development of potential gene-targeted MCD therapies. KEYWORDS Carbohydrate sulfotransferase 6 gene (CHST6); compound heterozygous mutations; Han Chinese family; macular corneal dystrophy (MCD).
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Affiliation(s)
- Yanxia Huang
- Center for Experimental Medicine, the Third Xiangya Hospital, Central South University, Changsha, China
| | - Lamei Yuan
- Center for Experimental Medicine, the Third Xiangya Hospital, Central South University, Changsha, China
| | - Yanna Cao
- Department of Ophthalmology, the Third Xiangya Hospital, Central South University, Changsha, China
| | - Renhong Tang
- Department of Ophthalmology, the Third Xiangya Hospital, Central South University, Changsha, China
| | - Hongbo Xu
- Center for Experimental Medicine, the Third Xiangya Hospital, Central South University, Changsha, China
| | - Ziqian Tang
- Center for Experimental Medicine, the Third Xiangya Hospital, Central South University, Changsha, China
| | - Hao Deng
- Center for Experimental Medicine, the Third Xiangya Hospital, Central South University, Changsha, China;,Department of Neurology, the Third Xiangya Hospital, Central South University, Changsha, China;,Disease Genome Research Center, Central South University, Changsha, China
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Li W, Qu N, Li JK, Li YX, Han DM, Chen YX, Tian L, Shao K, Yang W, Wang ZS, Chen X, Jin XY, Wang ZW, Liang C, Qian WP, Wang LS, He W. Evaluation of the Genetic Variation Spectrum Related to Corneal Dystrophy in a Large Cohort. Front Cell Dev Biol 2021; 9:632946. [PMID: 33816482 PMCID: PMC8012530 DOI: 10.3389/fcell.2021.632946] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/24/2020] [Accepted: 02/02/2021] [Indexed: 11/13/2022] Open
Abstract
AIMS To characterize the genetic landscape and mutation spectrum of patients with corneal dystrophies (CDs) in a large Han ethnic Chinese Cohort with inherited eye diseases (IEDs). METHODS Retrospective study. A large IED cohort was recruited in this study, including 69 clinically diagnosed CD patients, as well as other types of eye diseases patients and healthy family members as controls. The 792 genes on the Target_Eye_792_V2 chip were used to screen all common IEDs in our studies, including 22 CD-related genes. RESULTS We identified 2334 distinct high-quality variants on 22 CD-related genes in a large IEDs cohort. A total of 21 distinct pathogenic or likely pathogenic mutations were identified, and the remaining 2313 variants in our IED cohort had no evidence of CD-related pathogenicity. Overall, 81.16% (n = 56/69) of CD patients received definite molecular diagnoses, and transforming growth factor-beta-induced protein (TGFBI), CHTS6, and SLC4A11 genes covered 91.07, 7.14, and 1.79% of the diagnosed cases, respectively. Twelve distinct disease-associated mutations in the TGFBI gene were identified, 11 of which were previously reported and one is novel. Four of these TGFBI mutations (p.D123H, p.M502V, p.P501T, and p.P501A) were redefined as likely benign in our Han ethnic Chinese IED cohort after performing clinical variant interpretation. These four TGFBI mutations were detected in asymptomatic individuals but not in CD patients, especially the previously reported disease-causing mutation p.P501T. Among 56 CD patients with positive detected mutations, the recurrent TGFBI mutations were p.R124H, p.R555W, p.R124C, p.R555Q, and p.R124L, and the proportions were 32.14, 19.64, 14.29, 10.71, and 3.57%, respectively. Twelve distinct pathogenic or likely pathogenic mutations of CHTS6 were detected in 28 individuals. The recurrent mutations were p.Y358H, p.R140X, and p.R205W, and the proportions were 25.00, 21.43, and 14.29%, respectively. All individuals associated with TGFBI were missense mutations; 74.19% associated with CHTS6 mutations were missense mutations, and 25.81% were non-sense mutations. Hot regions were located in exons 4 and 12 of TGFBI individuals and located in exon 3 of CHTS6 individuals. No de novo mutations were identified. CONCLUSION For the first time, our large cohort study systematically described the variation spectrum of 22 CD-related genes and evaluated the frequency and pathogenicity of all 2334 distinct high-quality variants in our IED cohort. Our research will provide East Asia and other populations with baseline data from a Han ethnic population-specific level.
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Affiliation(s)
- Wei Li
- BGI Education Center, University of Chinese Academy of Sciences, Shenzhen, China
- College of Life Sciences, University of Chinese Academy of Sciences, Beijing, China
- Shenyang Industrial Technology Institute of Ophthalmology, Shenyang, China
| | - Ning Qu
- Department of Reproductive Medicine, Peking University Shenzhen Hospital, Shenzhen, China
| | - Jian-Kang Li
- City University of Hong Kong Shenzhen Research Institute, Shenzhen, China
| | - Yu-Xin Li
- BGI Education Center, University of Chinese Academy of Sciences, Shenzhen, China
- College of Life Sciences, University of Chinese Academy of Sciences, Beijing, China
- School of Basic Medicine, Qingdao University, Qingdao, China
| | - Dong-Ming Han
- BGI Education Center, University of Chinese Academy of Sciences, Shenzhen, China
- College of Life Sciences, University of Chinese Academy of Sciences, Beijing, China
| | - Yi-Xi Chen
- School of Biology and Biological Engineering, South China University of Technology, Guangzhou, China
| | - Le Tian
- BGI Education Center, University of Chinese Academy of Sciences, Shenzhen, China
- College of Life Sciences, University of Chinese Academy of Sciences, Beijing, China
- School of Basic Medicine, Qingdao University, Qingdao, China
| | - Kang Shao
- City University of Hong Kong Shenzhen Research Institute, Shenzhen, China
| | - Wen Yang
- City University of Hong Kong Shenzhen Research Institute, Shenzhen, China
| | - Zhuo-Shi Wang
- Shenyang Industrial Technology Institute of Ophthalmology, Shenyang, China
- He Eye Specialists Hospital, He University, Shenyang, China
| | - Xuan Chen
- College of Plant Protection, Hunan Agricultural University, Changsha, China
| | - Xiao-Ying Jin
- College of Informatics, HuaZhong Agricultural University, Wuhan, China
| | - Zi-Wei Wang
- BGI Education Center, University of Chinese Academy of Sciences, Shenzhen, China
- College of Life Sciences, University of Chinese Academy of Sciences, Beijing, China
| | - Chen Liang
- School of Basic Medicine, Qingdao University, Qingdao, China
| | - Wei-Ping Qian
- Department of Reproductive Medicine, Peking University Shenzhen Hospital, Shenzhen, China
| | - Lu-Sheng Wang
- City University of Hong Kong Shenzhen Research Institute, Shenzhen, China
| | - Wei He
- Shenyang Industrial Technology Institute of Ophthalmology, Shenyang, China
- He Eye Specialists Hospital, He University, Shenyang, China
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