Adenosine receptors and membrane microdomains.

Adenosine receptors and membrane microdomains.
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DOI:
10.1016/j.bbamem.2010.09.019
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发表时间:
2011-05
期刊:
Biochimica et biophysica acta
影响因子:
--
通讯作者:
Lasley RD
Lasley RD
中科院分区:
其他
文献类型:
--
作者:
Lasley RD

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腺苷受体是七个跨膜G蛋白偶联受体大家族中的一员。四种腺苷受体亚型A1、A2a、A2b、A3通过激活一个或多个异源三聚体G蛋白发挥作用,从而调节细胞内信号转导。在过去的十年里,大量的研究已经证明了GPCR信号在蛋白质-蛋白质相互作用以及通过信号串扰的水平上的复杂性。关于腺苷受体,一种受体亚型的激活可以对一种细胞类型产生深远的直接影响,但对其他细胞几乎没有影响。有重要证据表明,亚细胞信号的区隔在GPCR信号的保真度中起着生理作用。这种分隔在质膜水平上是明显的,表现为膜微域的形式,如小窝和脂筏。这篇综述将总结并批判性地评估我们目前对膜微域在调节腺苷受体信号中的作用的理解。
Adenosine receptors are a member of the large family of seven transmembrane spanning G protein coupled receptors (GPCR). The four adenosine receptor subtypes – A1, A2a, A2b, A3 – exert their effects via the activation of one or more heterotrimeric G proteins resulting in the modulation of intracellular signaling. Numerous studies over the past decade have documented the complexity of GPCR signaling at the level of protein-protein interactions as well as through signaling crosstalk. With respect to adenosine receptors the activation of one receptor subtype can have profound direct effects in one cell type, but little or no effect in other cells. There is significant evidence that the compartmentation of subcellular signaling plays a physiological role in the fidelity of GPCR signaling. This compartmentation is evident at the level of the plasma membrane in the form of membrane microdomains such as caveolae and lipid rafts. This review will summarize and critically assess our current understanding of the role of membrane microdomains in regulating adenosine receptor signaling.
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