Incidental identification of a thyroid hormone receptor beta (THRB) gene variant in a family with autoimmune thyroid disease.

ABSTRACT:

Background

Resistance to thyroid hormone (RTH) is a rare condition usually diagnosed in patients with classic thyroid function tests (TFTs) of elevated thyroid hormone levels with nonsuppressed TSH. The presence of autoimmune thyroid disease (AITD) can confound the clinical diagnosis of RTH. A family was evaluated because several members had elevated TSH and normal or low serum T4 concentrations with AITD. While these individuals were initially reported to have RTH, they were found to have a normal thyroid hormone receptor beta (THRB) gene sequence, and three other asymptomatic family members were found to harbor the variant TRβ G339S.

Methods

The THRB gene was sequenced in 19 members of a large Mexican/Aztec family. In vitro expression of the mutant TRβ protein was performe

SUBMITTER: Larsen CC 

PROVIDER: S-EPMC3868256 | biostudies-literature | 2013 Dec

REPOSITORIES: biostudies-literature