Whole exome sequencing reveals novel candidate genes in familial forms of Glaucomatous Neurodegeneration

Narta, K, Teltumbade, MR, Vishal, M, Sadaf, S, Faruq, M, Jama, H, Waseem, N, Rao, A, Sen, A, Ray, K and Mukhopadhyay, A ORCID: https://orcid.org/0000-0002-1089-7179 2023, 'Whole exome sequencing reveals novel candidate genes in familial forms of Glaucomatous Neurodegeneration' , Genes, 14 (2) , p. 495.

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Glaucoma is the largest cause of irreversible blindness with a multifactorial genetic etiology. This study explores novel genes and gene networks in familial forms of primary open angle glaucoma (POAG) and primary angle closure glaucoma (PACG) to identify rare mutations with high penetrance. Thirty-one samples from nine MYOC-negative families (five POAG and four PACG) underwent whole-exome sequencing and analysis. A set of prioritized genes and variations were screened in an independent validation cohort of 1536 samples and the whole-exome data from 20 sporadic patients. The expression profiles of the candidate genes were analyzed in 17 publicly available expression datasets from ocular tissues and single cells. Rare, deleterious SNVs in AQP5, SRFBP1, CDH6 and FOXM1 from POAG families and in ACACB, RGL3 and LAMA2 from PACG families were found exclusively in glaucoma cases. AQP5, SRFBP1 and CDH6 also revealed significant altered expression in glaucoma in expression datasets. Single-cell expression analysis revealed enrichment of identified candidate genes in retinal ganglion cells and corneal epithelial cells in POAG; whereas for PACG families, retinal ganglion cells and Schwalbe’s Line showed enriched expression. Through an unbiased exome-wide search followed by validation, we identified novel candidate genes for familial cases of POAG and PACG. The SRFBP1 gene found in a POAG family is located within the GLC1M locus on Chr5q. Pathway analysis of candidate genes revealed enrichment of extracellular matrix organization in both POAG and PACG.

Item Type: Article
Schools: Schools > School of Computing, Science and Engineering
Journal or Publication Title: Genes
Publisher: MDPI
ISSN: 2073-4425
Funders: Council of Scientific and Industrial Research, India, University of Salford
Depositing User: USIR Admin
Date Deposited: 17 Feb 2023 10:06
Last Modified: 17 Feb 2023 10:15
URI: https://usir.salford.ac.uk/id/eprint/66464

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