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2017 ; 173
(ä): 135-145
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New insights into thyroid hormone action
#MMPMID28174093
Mendoza A
; Hollenberg AN
Pharmacol Ther
2017[May]; 173
(ä): 135-145
PMID28174093
show ga
Thyroid hormones (TH) are endocrine messengers essential for normal development
and function of virtually every vertebrate. The hypothalamic-pituitary-thyroid
axis is exquisitely modulated to maintain nearly constant TH (T4 and T3) levels
in circulation. However peripheral tissues and the CNS control the intracellular
availability of TH, suggesting that circulating concentrations of TH are not
fully representative of what each cell type sees. Indeed, recent work in the
field has identified that TH transporters, deiodinases and thyroid hormone
receptor coregulators can strongly control tissue-specific sensitivity to a set
amount of TH. Furthermore, the mechanism by which the thyroid hormone receptors
regulate target gene expression can vary by gene, tissue and cellular context.
This review will highlight novel insights into the machinery that controls the
cellular response to TH, which include unique signaling cascades. These findings
shed new light into the pathophysiology of human diseases caused by abnormal TH
signaling.