The actions of thyroid hormone signaling in the nucleus.

The actions of thyroid hormone signaling in the nucleus.
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DOI:
10.1016/j.mce.2017.03.001
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发表时间:
2017-12-15
影响因子:
4.1
通讯作者:
Hollenberg AN
Hollenberg AN
中科院分区:
医学2区
文献类型:
--
作者:
Vella KR;Hollenberg AN

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甲状腺激素是哺乳动物生理学的重要调节器。它们的大部分作用是由于在细胞核中的作用,其中T3与甲状腺激素受体亚型结合以介导其作用。为了正常发挥功能,TR同种型必须被募集到它们上调的基因内的调节序列。在这些正调控的靶基因上,TR可以激活或抑制,这取决于受体是否与T3结合以及该细胞类型中存在的共调控蛋白的类型。与T3介导的激活相反,TR在T3存在下抑制转录的机制仍不清楚。在这里,我们将审查的组成部分的转录反应T3细胞核内,并试图突出在该领域的突出问题。
Thyroid hormones are a critical regulator of mammalian physiology. Much of their action is due to effects in the nucleus where T3 engages thyroid hormone receptor isoforms to mediate its effects. In order to function properly the TR isoforms must be recruited to regulatory sequences within genes that they up-regulate. On these positive regulated target genes the TR can activate or repress depending upon whether the receptor is bound to T3 or not and the type of co-regulatory proteins present in that cell type. In contrast to T3 mediated activation, the mechanism by which the TR represses transcription in the presence of T3 remains unclear. Herein we will review the components of the transcriptional response to T3 within the nucleus and attempt to highlight the outstanding questions in the field.
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