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Analysis of TPO gene in Turkish children with iodide organification defect: identification of a novel mutation.

Abstract：

:The objective was to determine molecular genetic analysis of the TPO gene in Turkish children with iodide organification defect (IOD). Patients with a diagnosis of primary hypothyroidism were evaluated. Subjects having a definite diagnosis of autoimmune thyroiditis, thyroid gland dysplasia and, or iodine deficiency were excluded. A total of 10 patients from nine unrelated Turkish families, with an unknown etiology of hypothyroidism, and with a presumptive diagnosis of IOD were included in the study. A perchlorate discharge test (PDT) was performed to all subjects, and sequence analysis of TPO gene was applied in patients with a positive PDT. Five out of 10 patients have a total IOD, while the five remaining patients have a partial IOD according to PDT results. In two sisters, one has a partial and the other one has a total IOD a novel homozygous nonsense p.Q315X mutation was found in exon 8. Additionally, a previously known homozygous missense p.R314W mutation was detected in the same exon in another patient with a total IOD. No TPO gene mutation was detected in any of the seven remaining patients. Two different TPO gene mutations were found to be responsible for IOD in two unrelated Turkish families from the same ethnic background. More subjects should be screened for detecting the prevalence and spectrum profile of TPO mutations in our population that might be helpful for understanding the pathophysiology of congenital hypothyroidism.

journal_name

Endocrine

journal_title

Endocrine

authors

Turkkahraman D,Alper OM,Pehlivanoglu S,Aydin F,Yildiz A,Luleci G,Akcurin S,Bircan I

doi

10.1007/s12020-009-9280-1

subject

Has Abstract

pub_date

2010-02-01 00:00:00

pages

124-8

issue

1

eissn

1355-008X

issn

1559-0100

journal_volume

37

pub_type

杂志文章

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