Involvement of multiple receptors in the actions of extracellular ATP: the example of vascular endothelial cells.

Involvement of multiple receptors in the actions of extracellular ATP: the example of vascular endothelial cells.
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多种受体参与细胞外 ATP 的作用:以血管内皮细胞为例。

DOI:
10.1016/1357-2725(94)00059-x
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发表时间:
1995
期刊:
The international journal of biochemistry & cell biology
影响因子:
--
通讯作者:
J. Boeynaems
J. Boeynaems
中科院分区:
--
文献类型:
--
作者:
S. Motte;D. Communi;S. Pirotton;J. Boeynaems

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ATP 和 ADP 作为细胞间介质的作用现已得到充分证实。细胞外液中核苷酸的存在可能由多种机制引起:细胞裂解、质膜的选择性透化和分泌囊泡(例如血小板致密体)的胞吐作用。细胞外腺嘌呤核苷酸被尤其在内皮细胞表面表达的核酸外切酶快速降解。它们通过 P2 受体家族作用于细胞,该家族包含超过 5 个亚型,其中一些最近已被克隆。 P2T、P2U和P2Y受体属于与G蛋白偶联的受体超家族,而P2X受体是阳离子通道,P2Z受体是非选择性孔。 ATP 和 ADP 通过增加胞质 Ca2+ 来刺激内皮细胞产生前列环素 (PGI2) 和一氧化氮 (NO),这两种血管舒张剂和血小板聚集抑制剂。据信腺嘌呤核苷酸的这种作用可以限制血管内血小板聚集的程度,并有助于将血栓形成局限于内皮损伤区域。内皮细胞对核苷酸的反应由至少两种不同的 P2 受体亚型 P2Y 和 P2U 介导,两者均与磷脂酶 C 偶联。
The role of ATP and ADP as intercellular mediators is now well established. The presence of the nucleotides in extracellular fluids can result from several mechanisms: cell lysis, selective permeabilization of the plasma membrane and exocytosis of secretory vesicles, such as platelet dense bodies. Extracellular adenine nucleotides are rapidly degraded by ectonucleotidases expressed inter alia on the surface of endothelial cells. They act on cells via the family of P2receptors which encompasses more than 5 subtypes, some of which have been cloned recently. The P2T, P2Uand P2Yreceptors belong to the superfamily of receptors coupled to G proteins, whereas the P2Xreceptor is a cation channel and the P2Zreceptor a non-selective pore. ATP and ADP stimulate the endothelial production of prostacyclin (PGI2) and nitric oxide (NO), two vasodilators and inhibitors of platelet aggregation, via an increase in cytosolic Ca2+. This action of adenine nucleotides is believed to limit the extent of intravascular platelet aggregation and to help localize thrombus formation to areas of endothelial damage. The endothelial response to nucleotides is mediated by at least two distinct subtypes of P2receptors, P2Yand P2U, both coupled to phospholipase C.
DOI: --
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影响因子: --
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血管内皮细胞中的核苷酸受体被完全电离形式的 ATP 和 UTP 特异性激活。
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发表时间: 1994
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DOI: --
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影响因子: --
作者:
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