Two novel mutations in the gene EDAR causing autosomal recessive hypohidrotic ectodermal dysplasia.

Abstract:

INTRODUCTION:Hypohidrotic ectodermal dysplasia (HED) is a human heritable disorder characterized by sparse hair, reduced ability to sweat and hypodontia. The HED exhibits X-linked, autosomal recessive and autosomal dominant mode of inheritance. Mutations in four genes including EDA, EDAR, EDARADD, and WNT10A are known to cause hypohidrotic and anhidrotic ectodermal dysplasia. MATERIALS AND METHODS:Genotyping of both affected and normal individuals of two consanguineous Pakistani families (A, B), showing autosomal recessive HED, was carried out using microsatellite markers linked to EDAR gene on chromosome 2q11-q13. To screen for mutations in the gene EDAR, all of its exons and splice junction were amplified and sequenced directly, using an automated DNA sequencer. RESULTS:Genotyping using microsatellite markers analysis showed linkage of the two families to gene EDAR on chromosome 2q11-2q13. Subsequently, screening of all the 12 exons and splice junctions of gene EDAR revealed a novel missense mutation (c.1163T>C; p.Ile388Thr) in family A and a novel insertion mutation (c.1014insA; p.V339SfsX6) in family B. CONCLUSION:Our findings extend the body of evidence supporting the role of EDAR signaling pathway as a powerful regulator of development of ectodermal appendages.

journal_name

Orthod Craniofac Res

authors

Naqvi SK,Wasif N,Javaid H,Ahmad W

doi

10.1111/j.1601-6343.2011.01521.x

subject

Has Abstract

pub_date

2011-08-01 00:00:00

pages

156-9

issue

3

eissn

1601-6335

issn

1601-6343

journal_volume

14

pub_type

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