A pathogenic variant in SLC26A4 is associated with Pendred syndrome in a consanguineous Iranian family

Pourahmadiyan, A and Alipour, P and Fattahi, N and Kasiri, M and Rezaeian, F and Taghipour-Sheshdeh A, A and Mohammadi-Asl, J and Tabatabaiefar, M and Hashemzadeh Chaleshtori, M (2019) A pathogenic variant in SLC26A4 is associated with Pendred syndrome in a consanguineous Iranian family. Int J Audiol.

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Official URL: https://www.ncbi.nlm.nih.gov/pubmed/31187663

Abstract

Objective: Hearing loss (HL) is a common sensory deficit with high phenotypic and genotypic heterogeneity. A large Iranian family with HL was genetically assessed in this study. Design: A proband from a consanguineous multiplex HL family from Iran was examined via Targeted Next-Generation Sequencing (TNGS). Sanger sequencing allowed the segregation analysis of the variant of interest and the investigation of its presence in a cohort of 50 ethnicity-matched healthy control individuals. The gene was previously associated with HL. Therefore, to determine whether the variant was specifically associated with Pendred Syndrome (PDS) or DFNB4, biochemical analyses, PTA, thyroid scans by Tc99m, perchlorate discharge test and high-resolution CT scan of the temporal bone were carried out on the affected family members. Study sample: Ten members of a large multiplex Iranian family with HL were recruited in this study. In addition, 50 unrelated healthy controls of the same ethnic group were randomly selected to genotype the variant. Results: A homozygous missense variant (NM_000441.1: c.1211C > T/p.Thr404Ile) in exon 10 was found segregating in the family. Based on the ACMG's guidelines, the variant was classified as pathogenic. Conclusion: This study expands the spectrum of SLC26A4 pathogenic variants in hearing loss

Item Type: Article
Uncontrolled Keywords: Hearing loss, Iran, Missense variant, next-generation sequencing
Subjects: WB Practice of Medicine
WH Hemic and Lymphatic System
QU Biochemistry
QZ pathology-Neoplasms
Divisions: Faculty of Medicine > Department of Clinical Sciences > Department of Pathology
Depositing User: Unnamed user with email nazari@skums.ac.ir
Date Deposited: 01 Jul 2019 05:33
Last Modified: 01 Jul 2019 05:33
URI: http://eprints.skums.ac.ir/id/eprint/7798

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