Application of WES Towards Molecular Investigation of Congenital Cataracts: Identification of Novel Alleles and Genes in a Hospital-Based Cohort of South India.

Abstract:

:Congenital cataracts are the prime cause for irreversible blindness in children. The global incidence of congenital cataract is 2.2-13.6 per 10,000 births, with the highest prevalence in Asia. Nearly half of the congenital cataracts are of familial nature, with a predominant autosomal dominant pattern of inheritance. Over 38 of the 45 mapped loci for isolated congenital or infantile cataracts have been associated with a mutation in a specific gene. The clinical and genetic heterogeneity of congenital cataracts makes the molecular diagnosis a bit of a complicated task. Hence, whole exome sequencing (WES) was utilized to concurrently screen all known cataract genes and to examine novel candidate factors for a disease-causing mutation in probands from 11 pedigrees affected with familial congenital cataracts. Analysis of the WES data for known cataract genes identified causative mutations in six pedigrees (55%) in PAX6, FYCO1 (two variants), EPHA2, P3H2,TDRD7 and an additional likely causative mutation in a novel gene NCOA6, which represents the first dominant mutation in this gene. This study identifies a novel cataract gene not yet linked to human disease. NCOA6 is a transcriptional coactivator that interacts with nuclear hormone receptors to enhance their transcriptional activator function.

journal_name

Int J Mol Sci

authors

Kandaswamy DK,Prakash MVS,Graw J,Koller S,Magyar I,Tiwari A,Berger W,Santhiya ST

doi

10.3390/ijms21249569

subject

Has Abstract

pub_date

2020-12-16 00:00:00

issue

24

issn

1422-0067

pii

ijms21249569

journal_volume

21

pub_type

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