Resistance to thyroid hormone in a patient without thyroid hormone receptor mutations.

Published

Journal Article

Resistance to thyroid hormone (RTH) is a clinical syndrome characterized by elevated serum thyroid hormone (TH) levels, unsuppressed thyrotropin (TSH) levels, and tissue hyposensitivity to TH. In almost all cases, the genetic basis of RTH lies in mutation of one of the two TH receptor beta (TRbeta) alleles. Recently, patients from several families with phenotypic manifestations of RTH in the absence of TR mutations have been described. We report a case of a 31-year-old woman who presented with goiter, tachycardia, elevated TH levels, unsuppressed TSH, and "inappropriately normal" levels of peripheral TH action markers. In two separate clinical evaluations, the patient exhibited typical clinical and biochemical evidence for peripheral and pituitary RTH. Surprisingly, reverse transcriptase-polymerase chain reaction (RT-PCR) of full-length TRalpha and TRbeta mRNAs, and genomic PCR using primers flanking exons encoding the carboxy-terminal region of TRbeta failed to demonstrate mutations in the TRalpha or TRbeta genes. It is likely that defects in the regulation of TR genes or mutations in transcriptional cofactors involved in TR signaling account for this patient's phenotype.

Full Text

Duke Authors

Cited Authors

  • Parikh, S; Ando, S; Schneider, A; Skarulis, MC; Sarlis, NJ; Yen, PM

Published Date

  • January 2002

Published In

Volume / Issue

  • 12 / 1

Start / End Page

  • 81 - 86

PubMed ID

  • 11838736

Pubmed Central ID

  • 11838736

International Standard Serial Number (ISSN)

  • 1050-7256

Digital Object Identifier (DOI)

  • 10.1089/105072502753452011

Language

  • eng

Conference Location

  • United States