Estrogen signaling in hypothalamic circuits controlling reproduction.

Estrogen signaling in hypothalamic circuits controlling reproduction.
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在控制繁殖的下丘脑回路中的雌激素信号传导。

DOI:
10.1016/j.brainres.2010.08.082
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发表时间:
2010-12-10
期刊:
影响因子:
2.9
通讯作者:
Qiu J
Qiu J
中科院分区:
医学3区
文献类型:
--
作者:
Kelly MJ;Qiu J

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众所周知,17β-雌二醇(E2)在中枢神经系统中的许多作用是通过与靶基因上的类固醇反应元件相互作用的细胞内受体/转录因子介导的。然而,有令人信服的证据表明,在下丘脑和其他脑神经元中存在雌激素的膜类固醇受体。然而,雌激素如何通过膜受体发出信号,以及这些信号如何不仅影响膜兴奋性,而且影响调节GnRH神经元兴奋性的神经元中的基因转录,这些都还没有很好的理解。事实上,人们已经知道E2可以在几秒钟内迅速改变神经元的活动,这表明一些细胞效应可以通过膜界定的事件发生。此外,E2可以影响第二信使系统,包括钙动员和过多的激酶,以改变细胞信号。因此,本综述将考虑我们目前的知识,快速膜启动和细胞内信号E2在下丘脑神经元的生殖功能至关重要。
It is well known that many of the actions of 17β-estradiol (E2) in the central nervous system are mediated via intracellular receptor/transcription factors that interact with steroid response elements on target genes. However, there is compelling evidence for membrane steroid receptors for estrogen in hypothalamic and other brain neurons. Yet, it is not well understood how estrogen signals via membrane receptors, and how these signals impact not only membrane excitability but also gene transcription in neurons that modulate GnRH neuronal excitability. Indeed, it has been known for sometime that E2 can rapidly alter neuronal activity within seconds, indicating that some cellular effects can occur via membrane delimited events. In addition, E2 can affect second messenger systems including calcium mobilization and a plethora of kinases to alter cell signaling. Therefore, this review will consider our current knowledge of rapid membrane-initiated and intracellular signaling by E2 in hypothalamic neurons critical for reproductive function.
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