Getting specialized: presynaptic and postsynaptic dopamine D2 receptors.

Getting specialized: presynaptic and postsynaptic dopamine D2 receptors.
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DOI:
10.1016/j.coph.2008.12.002
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发表时间:
2009-02
影响因子:
4
通讯作者:
Borrelli E
Borrelli E
中科院分区:
医学3区
文献类型:
--
作者:
De Mei C;Ramos M;Iitaka C;Borrelli E

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多巴胺(DA)信号通路控制着从运动到激素分泌的许多生理功能,在成瘾中起着关键作用。DA升高,例如在对滥用药物的反应中,同时激活表达不同DA受体的神经元;来自不同神经元/受体的反应如何在行为和细胞结果的产生中协调,仍然没有完全确定。来自DA D2受体(D2 Rs)的信号传导是说明这种复杂性的一个很好的例子。D2 R具有突触前和突触后的定位和功能,其在体内由两种同种型共享。基因敲除小鼠的最新结果正在阐明位点和D2亚型特异性效应的作用,从而增加了我们对DA如何调节神经元生理学的理解。
Dopamine (DA) signaling controls many physiological functions ranging from locomotion to hormone secretion, and plays a critical role in addiction. DA elevation, for instance in the response to drugs of abuse, simultaneously activates neurons expressing different DA receptors; how responses from diverse neurons/receptors are orchestrated in the generation of behavioral and cellular outcomes, is still not completely defined. Signaling from DA D2 receptors (D2Rs) is a good example to illustrate this complexity. D2Rs have presynaptic and postsynaptic localization and functions, which are shared by two isoforms in vivo. Recent results from knockout mice are clarifying the role of site and D2 isoform-specific effects thereby increasing our understanding of how DA modulates neuronal physiology.
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