SLC26A4 mutations are associated with a specific inner ear malformation.

Abstract:

BACKGROUND AND AIM:Inner ear anomalies have been reported in approximately 30% of children with early onset deafness. Identification of causative genetic factors in a large proportion of these patients was not successful. Mutations in the SLC26A4 gene have been detected in individuals with enlarged vestibular aqueduct (EVA) or Mondini dysplasia. We aimed to characterize the inner ear anomalies associated with SLC26A4 mutations. METHODS:The SLC26A4 gene has been screened for mutations in 16 subjects from 14 unrelated Turkish families with a variety of inner ear anomalies ranging from Michel aplasia to incomplete partition-II and EVA. None of the patients was diagnosed to have a recognizable genetic syndrome. Additional four patients with Pendred syndrome from three families were included. RESULTS:Only one patient with EVA was found to have a heterozygous mutation (c.1586delT) in SLC26A4. All patients with Pendred syndrome had homozygous mutations and were noted to have either EVA or EVA associated with incomplete partition-II on the computed tomography of the temporal bone. CONCLUSION:SLC26A4 mutations are not associated with a large spectrum of inner ear anomalies. They, instead, result in a specific morphological appearance consistent with EVA or incomplete partition-II.

authors

Fitoz S,Sennaroğlu L,Incesulu A,Cengiz FB,Koç Y,Tekin M

doi

10.1016/j.ijporl.2006.11.022

subject

Has Abstract

pub_date

2007-03-01 00:00:00

pages

479-86

issue

3

eissn

0165-5876

issn

1872-8464

pii

S0165-5876(06)00493-9

journal_volume

71

pub_type

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