Arch Iran Med. 2012;15(1): 0-0.
PMID: 22208444
Scopus ID: 84855733183
  Abstract View: 546
  PDF Download: 336

Brief Report

The Anticipation and Inheritance Pattern of c.487A>G Mutation in the GJB2 Gene

Masoumeh Falah, Massoud Houshmand, Saeid Mahmoudian, Hessamalddin Emamdjomeh, Yaser Ghavami, Mohammad Farhadi *


Mutations in the GJB2 gene are the most common causes of hereditary hearing loss. This study reveals some facts about the inheritance pattern of M163V in the GJB2 gene.
This study was performed on two different families with non-syndromic hearing loss. We screened the GJB2 coding region with direct sequencing.
There was a substitution of A to G in exon 2 at nucleotide 487 (M163V). This mutation was heterozygous in fathers and children while mothers were normal. Fathers of both families showed late onset hearing impairment, but there was early onset hearing loss in the children, which was more severe compared to the fathers.
M163V has been reported as an unknown heterozygous mutation that leads to failure of the homotypic junctional channel formation. Another mutation in this codon is M163L, with an autosomal dominant inheritance, which impairs trafficking through the plasma membrane, resulting in cell death. Assessment of the familial pedigree has revealed anticipation in phenotype and autosomal dominant inheritance. These data in addition to the high conservation of methionine residue in mammalian species suggest that M163V is inherited with an autosomal dominant pattern. Therefore, the risk of inheritance will increase. Genetic counselors and otologists should prioritize the evaluation and prevention of this disorder in patients.

First Name
Last Name
Email Address
Security code

Abstract View: 546

Your browser does not support the canvas element.

PDF Download: 336

Your browser does not support the canvas element.

ePublished: 01 Jan 2012
EndNote EndNote

(Enw Format - Win & Mac)

BibTeX BibTeX

(Bib Format - Win & Mac)

Bookends Bookends

(Ris Format - Mac only)

EasyBib EasyBib

(Ris Format - Win & Mac)

Medlars Medlars

(Txt Format - Win & Mac)

Mendeley Web Mendeley Web
Mendeley Mendeley

(Ris Format - Win & Mac)

Papers Papers

(Ris Format - Win & Mac)

ProCite ProCite

(Ris Format - Win & Mac)

Reference Manager Reference Manager

(Ris Format - Win only)

Refworks Refworks

(Refworks Format - Win & Mac)

Zotero Zotero

(Ris Format - Firefox Plugin)