Two common and three novel PDS mutations in Thai patients with Pendred syndrome.

Abstract:

:Pendred syndrome is an autosomal recessive disorder characterized by congenital sensorineural deafness, goiter, and impaired iodide organification. It is caused by mutations in the PDS gene. Most published mutation studies of Pendred syndrome have dealt with Western populations. In this study, we examined clinical and molecular characteristics of 16 affected individuals in 6 unrelated Thai families. Of all the affected, 100% (16/16) had bilateral deafness, 68.8% (11/16) goiters, and 25% (4/16) hypothyroidism. Follicular thyroid carcinoma and Hürthle cell adenoma were found in affected members of a family, raising the possibility of an increased risk of thyroid carcinoma in Pendred syndrome patients. Sequence analysis of the entire coding region of the PDS gene successfully identified all 12 mutant alleles in these 6 families. The 12 identified mutant alleles constituted 6 distinct mutations including 3 splice site mutations (IVS4-1G>A, IVS7-2A>G, IVS9- 1G>A), one frame shift mutation (1548insC) and 2 missense mutations (T67S, H723R). Eight mutations out of 12 were constituted by IVS7- 2A>G and 1548insC, each one being present in 4 distinct alleles in our studied group. The identification of these two frequent PDS mutations will facilitate the molecular diagnosis of Pendred syndrome in Thai populations. In addition, three newly identified mutations, T67S, IVS4-1G>A, and IVS9-1G>A, were not observed in 50 unrelated healthy Thai controls.

journal_name

J Endocrinol Invest

authors

Snabboon T,Plengpanich W,Saengpanich S,Sirisalipoch S,Keelawat S,Sunthornyothin S,Khovidhunkit W,Suwanwalaikorn S,Sridama V,Shotelersuk V

doi

10.1007/BF03349236

subject

Has Abstract

pub_date

2007-12-01 00:00:00

pages

907-13

issue

11

eissn

0391-4097

issn

1720-8386

pii

4344

journal_volume

30

pub_type

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