A COL17A1 splice-altering mutation is prevalent in inherited recurrent corneal erosions

V.F. Oliver, K.A. Van Bysterveldt, M. Cadzow, B. Steger, V. Romano, D. Markie, Alex Hewitt, David Mackey, C.E. Willoughby, T. Sherwin, P.S. Crosier, C.N. Mcghee, A.L. Vincent

Research output: Contribution to journalArticle

16 Citations (Scopus)

Abstract

© 2016 by the American Academy of Ophthalmology Published by Elsevier Inc. 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 phen
Original languageEnglish
Pages (from-to)709-722
Number of pages14
JournalOphthalmology
Volume123
Issue number4
Early online date16 Jan 2016
DOIs
Publication statusPublished - Apr 2016
EventA COL17A1 splice-altering mutation is prevalent in inherited recurrent corneal erosions -
Duration: 1 Jan 2016 → …

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