Progesterone inhibits apoptosis in part by PGRMC1-regulated gene expression.

Progesterone inhibits apoptosis in part by PGRMC1-regulated gene expression.
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黄体酮部分通过 PGRMC1 调节的基因表达抑制细胞凋亡。

DOI:
10.1016/j.mce.2010.02.005
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发表时间:
2010-05-14
影响因子:
4.1
通讯作者:
Wu CA
Wu CA
中科院分区:
医学2区
文献类型:
--
作者:
Peluso JJ;Liu X;Gawkowska A;Lodde V;Wu CA

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前列腺素受体膜组分-1(PGRMC 1)存在于自发永生化颗粒细胞(SIGCs)的细胞质和细胞核中。PGRMC 1在细胞质中被检测为单体,在细胞核中被检测为DTT抗性PGRMC 1二聚体。转染的PGRMC 1-GFP主要定位于细胞质并且不形成DTT抗性二聚体。此外,PGRMC 1-GFP的强制表达增加了SIGC对孕酮(P4)的抗凋亡作用的敏感性,表明PGRMC 1单体是功能性的。然而,当内源性PGRMC 1被siRNA处理耗尽并用PGRMC 1-GFP替换时,P4反应性没有增强,尽管PGRMC 1的总体水平增加。P4的抗凋亡作用也被放线菌素D(RNA合成抑制剂)减弱,P4激活PGRMC 1抑制Bad并增加Bcl 2a 1d表达。总之,目前的研究表明,PGRMC 1的抗凋亡作用机制的基因组成分,这需要PGRMC 1二聚体的存在。
Progesterone Receptor Membrane Component-1 (PGRMC1) is present in both the cytoplasm and nucleus of spontaneously immortalized granulosa cells (SIGCs). PGRMC1 is detected as a monomer in the cytoplasm and a DTT-resistant PGRMC1 dimer in the nucleus. Transfected PGRMC1-GFP localizes mainly to the cytoplasm and does not form a DTT-resistant dimer. Moreover, forced expression of PGRMC1-GFP increases the sensitivity of the SIGCs to progesterone (P4) 's anti-apoptotic action, indicating that the PGRMC1 monomer is functional. However, when endogenous PGRMC1 is depleted by siRNA treatment and replaced with PGRMC1-GFP, P4 responsiveness is not enhanced, although overall levels of PGRMC1 are increased. P4's anti-apoptotic action is also attenuated by actinomycin D, an inhibitor of RNA synthesis, and P4 activation of PGRMC1 suppresses Bad and increases Bcl2a1d expression. Taken together, the present studies suggest a genomic component to PGRMC1's anti-apoptotic mechanism of action, which requires the presence of the PGRMC1 dimer.
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发表时间: 1991-07-01
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