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Turunen JA, Tuisku IS, Repo P, Mörtenhumer S, Kawan S, Järvinen RS, Korsbäck A, Immonen AT, Kivelä TT. Epithelial recurrent erosion dystrophy (ERED) from the splice site altering COL17A1 variant c.3156C>T in families of Finnish-Swedish ancestry. Acta Ophthalmol 2024; 102:296-305. [PMID: 37289141 DOI: 10.1111/aos.15716] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/29/2023] [Revised: 05/05/2023] [Accepted: 05/17/2023] [Indexed: 06/09/2023]
Abstract
PURPOSE To describe four Finnish families with epithelial recurrent erosion dystrophy (ERED) caused by the pathogenic variant c.3156C>T in collagen type XVII alpha 1 chain gene (COL17A1). METHODS Eleven affected and two unaffected individuals underwent clinical ophthalmological examination, anterior segment photography, and corneal topography. Two of them underwent phototherapeutic keratectomy (PTK). Genetic analysis included both next-generation and Sanger sequencing. Specimens from the manual keratectomy of one patient were available for ophthalmic pathologic examination, including immunohistochemistry. RESULTS The common splice-site altering synonymous variant c.3156C > T, p.(Gly1052=) in COL17A1 was confirmed in 15 individuals with ERED from the four families. Subepithelial corneal scarring grades varied and increased with age, leading to decreased best-corrected visual acuity. PTK improved vision in 58- and 67-year-old individuals without reactivating the disease. The keratectomy specimens showed an uneven epithelium and a spectrum of basement membrane abnormalities, including breaks, fragmentation, multiplication and entrapment within the subepithelial scar, reflecting recurrent erosions. The stromal cells consisted of varying proportions of bland and activated fibroblasts and myofibroblasts, reflecting different ages of scars. The family with the largest number of known affected generations originated from Southern Sweden. CONCLUSION The phenotype in the Finnish ERED families is consistent with earlier reports of the c.3156C > T variant, although the severity has varied between reports. The phenotype may be modulated by other genes. This study suggests a likely founder effect of the variant in both Finnish and Swedish populations due to their shared population histories. If vision is compromised, PTK can be considered especially in older patients.
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Affiliation(s)
- Joni A Turunen
- Ophthalmic Genetics Service, Department of Ophthalmology, University of Helsinki and Helsinki University Hospital, Helsinki, Finland
- Eye Genetics Group, Folkhälsan Research Center, Helsinki, Finland
| | - Ilpo S Tuisku
- Cornea and Anterior Segment Surgery Service, Department of Ophthalmology, University of Helsinki and Helsinki University Hospital, Helsinki, Finland
| | - Pauliina Repo
- Ophthalmic Genetics Service, Department of Ophthalmology, University of Helsinki and Helsinki University Hospital, Helsinki, Finland
- Eye Genetics Group, Folkhälsan Research Center, Helsinki, Finland
| | - Sanna Mörtenhumer
- Cornea and Anterior Segment Surgery Service, Department of Ophthalmology, University of Helsinki and Helsinki University Hospital, Helsinki, Finland
| | - Sabita Kawan
- Eye Genetics Group, Folkhälsan Research Center, Helsinki, Finland
| | | | - Anna Korsbäck
- Cornea and Anterior Segment Surgery Service, Department of Ophthalmology, University of Helsinki and Helsinki University Hospital, Helsinki, Finland
| | - Annamari T Immonen
- Eye Genetics Group, Folkhälsan Research Center, Helsinki, Finland
- Cornea and Anterior Segment Surgery Service, Department of Ophthalmology, University of Helsinki and Helsinki University Hospital, Helsinki, Finland
| | - Tero T Kivelä
- Ophthalmic Pathology Laboratory, Department of Ophthalmology, University of Helsinki and Helsinki University Hospital, Helsinki, Finland
- Department of Pathology, HUSLAB, Helsinki, Finland
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Srilekha S, Rao B, Rao DM, Sudha D, Chandrasekar SP, Pandian AJ, Soumittra N, Sripriya S. Strategies for Gene Mapping in Inherited Ophthalmic Diseases. Asia Pac J Ophthalmol (Phila) 2016; 5:282-92. [PMID: 27488070 DOI: 10.1097/apo.0000000000000228] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022] Open
Abstract
Gene mapping of inherited ophthalmic diseases such as congenital cataracts, retinal degeneration, glaucoma, age-related macular degeneration, myopia, optic atrophy, and eye malformations has shed more light on the disease pathology, identified targets for research on therapeutics, earlier detection, and treatment options for disease management and patient care. This article details the different approaches to gene identification for both Mendelian and complex eye disorders.
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Affiliation(s)
- Sundar Srilekha
- From the SNONGC Department of Genetics and Molecular Biology, Kamal Nayan Bajaj Institute for Research in Vision and Ophthalmology (KNBIRVO), Chennai, Tamil Nadu, India
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Lin BR, Le DJ, Chen Y, Wang Q, Chung DD, Frausto RF, Croasdale C, Yee RW, Hejtmancik FJ, Aldave AJ. Whole Exome Sequencing and Segregation Analysis Confirms That a Mutation in COL17A1 Is the Cause of Epithelial Recurrent Erosion Dystrophy in a Large Dominant Pedigree Previously Mapped to Chromosome 10q23-q24. PLoS One 2016; 11:e0157418. [PMID: 27309958 PMCID: PMC4911149 DOI: 10.1371/journal.pone.0157418] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/28/2015] [Accepted: 05/31/2016] [Indexed: 12/04/2022] Open
Abstract
PURPOSE To report identification of a COL17A1 mutation in a family with a corneal dystrophy previously mapped to chromosome 10q23-q24. METHODS Whole-exome sequencing was performed on DNA samples from five affected family members and two unrelated, unaffected individuals. Identified variants were filtered for those that were: located in the linked interval on chromosome 10q23-q24; novel or rare (minor allele frequency ≤0.01); heterozygous; present in all affected individuals and not in controls; and present in genes that encode proteins expressed in human corneal epithelial cells (reads per kilobase per million ≥1). Sanger sequencing of identified variants (SNVs) was performed in additional family members. In silico analysis was used to predict the functional impact of non-synonymous variants. RESULTS Three SNVs located in two genes were identified that met the filtering criteria: one rare synonymous c.3156C>T variant in the collagen, type XVII, alpha I (COL17A1) gene; and two rare variants, one synonymous and one missense, in the dynamin binding protein (DNMBP) gene. Sanger sequencing of additional family members determined that only the COL17A1 variant segregates with the affected phenotype. In silico analysis predicts that the missense variant in DNMBP would be tolerated. CONCLUSIONS The corneal dystrophy mapped to chromosome 10q23-q24 is associated with the c.3156C>T variant in COL17A1. As this variant has recently been identified in five other families with early onset recurrent corneal erosions, and has been shown in vitro to introduce a cryptic splice donor site, this dystrophy is likely caused by aberrant splicing of COL17A1 and should be classified as epithelial recurrent erosion dystrophy.
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MESH Headings
- Aged
- Alleles
- Alternative Splicing
- Autoantigens/genetics
- Autoantigens/metabolism
- Case-Control Studies
- Chromosome Mapping
- Chromosomes, Human, Pair 10/chemistry
- Corneal Dystrophies, Hereditary/diagnosis
- Corneal Dystrophies, Hereditary/genetics
- Corneal Dystrophies, Hereditary/metabolism
- Corneal Dystrophies, Hereditary/pathology
- Cytoskeletal Proteins/genetics
- Epithelial Cells/metabolism
- Epithelial Cells/pathology
- Epithelium, Corneal/metabolism
- Epithelium, Corneal/pathology
- Exome
- Female
- Gene Expression
- Gene Frequency
- Genes, Dominant
- Genome-Wide Association Study
- Heterozygote
- Humans
- Male
- Mutation
- Non-Fibrillar Collagens/genetics
- Non-Fibrillar Collagens/metabolism
- Pedigree
- Phenotype
- Polymorphism, Single Nucleotide
- Sequence Analysis, DNA
- Collagen Type XVII
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Affiliation(s)
- Benjamin R. Lin
- Stein Eye Institute, David Geffen School of Medicine at UCLA, Los Angeles, California, United States of America
| | - Derek J. Le
- Stein Eye Institute, David Geffen School of Medicine at UCLA, Los Angeles, California, United States of America
| | - Yabin Chen
- Ophthalmic Genetics and Visual Function Branch, National Eye Institute, National Institutes of Health, Bethesda, Maryland, United States of America
| | - Qiwei Wang
- Ophthalmic Genetics and Visual Function Branch, National Eye Institute, National Institutes of Health, Bethesda, Maryland, United States of America
| | - D. Doug Chung
- Stein Eye Institute, David Geffen School of Medicine at UCLA, Los Angeles, California, United States of America
| | - Ricardo F. Frausto
- Stein Eye Institute, David Geffen School of Medicine at UCLA, Los Angeles, California, United States of America
| | | | - Richard W. Yee
- Cross Ophthalmology Associates, Houston, Texas, United States of America
| | - Fielding J. Hejtmancik
- Ophthalmic Genetics and Visual Function Branch, National Eye Institute, National Institutes of Health, Bethesda, Maryland, United States of America
| | - Anthony J. Aldave
- Stein Eye Institute, David Geffen School of Medicine at UCLA, Los Angeles, California, United States of America
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Oliver VF, van Bysterveldt KA, Cadzow M, Steger B, Romano V, Markie D, Hewitt AW, Mackey DA, Willoughby CE, Sherwin T, Crosier PS, McGhee CN, Vincent AL. A COL17A1 Splice-Altering Mutation Is Prevalent in Inherited Recurrent Corneal Erosions. Ophthalmology 2016; 123:709-22. [PMID: 26786512 DOI: 10.1016/j.ophtha.2015.12.008] [Citation(s) in RCA: 28] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/20/2015] [Revised: 11/06/2015] [Accepted: 12/05/2015] [Indexed: 12/28/2022] Open
Abstract
PURPOSE Corneal dystrophies are a genetically heterogeneous group of disorders. We previously described a family with an autosomal dominant epithelial recurrent erosion dystrophy (ERED). We aimed to identify the underlying genetic cause of ERED in this family and 3 additional ERED families. We sought to characterize the potential function of the candidate genes using the human and zebrafish cornea. DESIGN Case series study of 4 white families with a similar ERED. An experimental study was performed on human and zebrafish tissue to examine the putative biological function of candidate genes. PARTICIPANTS Four ERED families, including 28 affected and 17 unaffected individuals. METHODS HumanLinkage-12 arrays (Illumina, San Diego, CA) were used to genotype 17 family members. Next-generation exome sequencing was performed on an uncle-niece pair. Segregation of potential causative mutations was confirmed using Sanger sequencing. Protein expression was determined using immunohistochemistry in human and zebrafish cornea. Gene expression in zebrafish was assessed using whole-mount in situ hybridization. Morpholino-induced transient gene knockdown was performed in zebrafish embryos. MAIN OUTCOME MEASURES Linkage microarray, exome analysis, DNA sequence analysis, immunohistochemistry, in situ hybridization, and morpholino-induced genetic knockdown results. RESULTS Linkage microarray analysis identified a candidate region on chromosome chr10:12,576,562-112,763,135, and exploration of exome sequencing data identified 8 putative pathogenic variants in this linkage region. Two variants segregated in 06NZ-TRB1 with ERED: COL17A1 c.3156C→T and DNAJC9 c.334G→A. The COL17A1 c.3156C→T variant segregated in all 4 ERED families. We showed biologically relevant expression of these proteins in human cornea. Both proteins are expressed in the cornea of zebrafish embryos and adults. Zebrafish lacking Col17a1a and Dnajc9 during development show no gross corneal phenotype. CONCLUSIONS The COL17A1 c.3156C→T variant is the likely causative mutation in our recurrent corneal erosion families, and its presence in 4 independent families suggests that it is prevalent in ERED. This same COL17A1 c.3156C→T variant recently was identified in a separate pedigree with ERED. Our study expands the phenotypic spectrum of COL17A1 disease from autosomal recessive epidermolysis bullosa to autosomal dominant ERED and identifies COL17A1 as a key protein in maintaining integrity of the corneal epithelium.
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Affiliation(s)
- Verity F Oliver
- Department of Ophthalmology, New Zealand National Eye Centre, Faculty of Medical and Health Sciences, The University of Auckland, Auckland, New Zealand
| | - Katherine A van Bysterveldt
- Department of Ophthalmology, New Zealand National Eye Centre, Faculty of Medical and Health Sciences, The University of Auckland, Auckland, New Zealand
| | - Murray Cadzow
- Department of Biochemistry, Dunedin School of Medicine, Otago University, Dunedin, New Zealand
| | - Bernhard Steger
- Department of Corneal and External Eye Diseases, St. Paul's Eye Unit, Royal Liverpool University Hospital, Liverpool, United Kingdom
| | - Vito Romano
- Department of Corneal and External Eye Diseases, St. Paul's Eye Unit, Royal Liverpool University Hospital, Liverpool, United Kingdom
| | - David Markie
- Pathology Department, Dunedin School of Medicine, Otago University, Dunedin, New Zealand
| | - Alex W Hewitt
- Menzies Institute for Medical Research, University of Tasmania, Hobart, Australia; Lions Eye Institute, University of Western Australia, Perth, Australia
| | - David A Mackey
- Menzies Institute for Medical Research, University of Tasmania, Hobart, Australia; Lions Eye Institute, University of Western Australia, Perth, Australia
| | - Colin E Willoughby
- Department of Corneal and External Eye Diseases, St. Paul's Eye Unit, Royal Liverpool University Hospital, Liverpool, United Kingdom; Department of Eye and Vision Science, Institute of Ageing and Chronic Disease, University of Liverpool, Liverpool, United Kingdom
| | - Trevor Sherwin
- Department of Ophthalmology, New Zealand National Eye Centre, Faculty of Medical and Health Sciences, The University of Auckland, Auckland, New Zealand
| | - Philip S Crosier
- Department of Molecular Medicine and Pathology, Faculty of Medical and Health Sciences, The University of Auckland, Auckland, New Zealand
| | - Charles N McGhee
- Department of Ophthalmology, New Zealand National Eye Centre, Faculty of Medical and Health Sciences, The University of Auckland, Auckland, New Zealand; Eye Department, Greenlane Clinical Centre, Auckland District Health Board, Auckland, New Zealand
| | - Andrea L Vincent
- Department of Ophthalmology, New Zealand National Eye Centre, Faculty of Medical and Health Sciences, The University of Auckland, Auckland, New Zealand; Eye Department, Greenlane Clinical Centre, Auckland District Health Board, Auckland, New Zealand.
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Jonsson F, Byström B, Davidson AE, Backman LJ, Kellgren TG, Tuft SJ, Koskela T, Rydén P, Sandgren O, Danielson P, Hardcastle AJ, Golovleva I. Mutations in collagen, type XVII, alpha 1 (COL17A1) cause epithelial recurrent erosion dystrophy (ERED). Hum Mutat 2015; 36:463-73. [PMID: 25676728 DOI: 10.1002/humu.22764] [Citation(s) in RCA: 36] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/07/2014] [Accepted: 02/02/2015] [Indexed: 01/04/2023]
Abstract
Corneal dystrophies are a clinically and genetically heterogeneous group of inherited disorders that bilaterally affect corneal transparency. They are defined according to the corneal layer affected and by their genetic cause. In this study, we identified a dominantly inherited epithelial recurrent erosion dystrophy (ERED)-like disease that is common in northern Sweden. Whole-exome sequencing resulted in the identification of a novel mutation, c.2816C>T, p.T939I, in the COL17A1 gene, which encodes collagen type XVII alpha 1. The variant segregated with disease in a genealogically expanded pedigree dating back 200 years. We also investigated a unique COL17A1 synonymous variant, c.3156C>T, identified in a previously reported unrelated dominant ERED-like family linked to a locus on chromosome 10q23-q24 encompassing COL17A1. We show that this variant introduces a cryptic donor site resulting in aberrant pre-mRNA splicing and is highly likely to be pathogenic. Bi-allelic COL17A1 mutations have previously been associated with a recessive skin disorder, junctional epidermolysis bullosa, with recurrent corneal erosions being reported in some cases. Our findings implicate presumed gain-of-function COL17A1 mutations causing dominantly inherited ERED and improve understanding of the underlying pathology.
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Affiliation(s)
- Frida Jonsson
- Department of Medical Biosciences/Medical and Clinical Genetics, Umeå University, Umeå, Sweden
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