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Homozygosity Mapping and Targeted Sanger Sequencing Identifies Three Novel CRB1 (Cumbs homologue 1) Mutations in Iranian Retinal Degeneration Families
Mohammad Ghofrani , Mahin Yahyaei, Han G. Brunner, Frans P.M. Cremers, Morteza Movasat, Muhammad Imran Khan, Mohammad Keramatipour
Abstract:  

Background: Inherited retinal diseases (IRDs) are a group of genetic disorders with high degrees of clinical, genetic and allelic heterogeneity. IRDs generally show progressive retinal cell death resulting in gradual vision loss. IRDs constitute a broad spectrum of disorders including retinitis pigmentosa and Leber congenital amaurosis. In this study, we performed genotyping studies to identify the underlying mutations in three Iranian families. Methods: Having employed homozygosity mapping and Sanger sequencing, we identified the underlying mutations in the crumbs homologue 1 gene. The CRB1 protein is a part of a macromolecular complex with a vital role in retinal cell polarity, morphogenesis, and maintenance. Results: We identified a novel homozygous variant (c.1053_1061del; p.Gly352_Cys354del) in one family, a combination of a novel (c.2086T>C; p.Cys696Arg) and a known variant (c.2234C>T, p.Thr745Met) in another family and a homozygous novel variant (c.3090T>A; p.Asn1030Lys) in a third family. Conclusion: This study shows that mutations in CRB1 are relatively common in Iranian non-syndromic IRD patients.

Keywords: Retinal degeneration, Retinitis pigmentosa, Leber congenital amaurosis, Mutation, Iran
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Type of Study: Full Length | Subject: Related Fields
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PMID: 28460491


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Ghofrani M, Yahyaei M, Brunner H G, Cremers F P, Movasat M, Imran Khan M et al . Homozygosity Mapping and Targeted Sanger Sequencing Identifies Three Novel CRB1 (Cumbs homologue 1) Mutations in Iranian Retinal Degeneration Families. IBJ. 2017;
URL: http://ibj.pasteur.ac.ir/article-1-2032-en.html
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