Journal
THYROID
Volume 12, Issue 6, Pages 441-446Publisher
MARY ANN LIEBERT INC PUBL
DOI: 10.1089/105072502760143791
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Thyroid hormone (triiodothyronine [T-3]) regulates gene expression by binding to high-affinity nuclear receptors. Thyroid hormone receptors (TRs) recognize specific response element sequences in the promoters of T-3-target genes and activate or repress transcription in response to hormone. In this paper, we review the TR proteins and thyroid hormone response elements (TREs) to which they bind, the mechanisms of action of TRs bound to the TRE in basal and liganded conformations, and the interacting proteins implicated in these complexes. We then briefly consider the cross-talk with other signaling pathways and introduce the idea that T-3 may also act rapidly via nongenomic actions located on membranes. We discuss patterns of gene expression and specific actions of the various TR isoforms and consider the novel TR isoform specific ligands.
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