We can do it together: PAR1/PAR2 heterodimer signaling in VSMCs.

We can do it together: PAR1/PAR2 heterodimer signaling in VSMCs.
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我们可以一起做:VSMC 中的 PAR1/PAR2 异二聚体信号传导。

DOI:
10.1161/atvbaha.111.238865
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发表时间:
2011
期刊:
Arteriosclerosis, thrombosis, and vascular biology
影响因子:
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通讯作者:
Holinstat,Michael
Holinstat,Michael
中科院分区:
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文献类型:
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作者:
Pawlinski,Rafal;Holinstat,Michael

文献摘要

相似文献

在本期中,Sevigny 及其同事证明,蛋白酶激活受体 (PAR) 1-PAR2 异二聚体可调节血管损伤后的血管平滑肌细胞 (VSMC) 增生。 1 PAR 属于 G 蛋白偶联受体家族,可通过多种蛋白酶进行蛋白水解激活。 2, 3 PAR 的裂解导致细胞内信号传导,该信号传导由各种 G 蛋白(包括 G12/13、Gq 和 Gi)的激活介导。 2、4–6 PAR 家族由 4 个成员组成:PAR1–PAR4,其中 PAR 1、3 和 4 主要由凝血酶激活,而 PAR2 由胰蛋白酶和类胰蛋白酶激活。 2, 3 PAR1 最初被鉴定为血小板上的凝血酶受体,广泛表达,并已被证明可以调节多种生理过程,包括血小板活化、7、8 内皮细胞屏障功能的调节、9 以及 VSMC 的增殖和去分化。 10, 11 除了 PAR1 之外,这些细胞还表达其他 PAR。 6 重要的是,PAR 家族成员可以作为功能性异二聚体进行物理相互作用和信号传导,以调节细胞生长、增殖和激活。 12–15 例如,PAR1 已被证明可以反式激活人内皮细胞和 COS-7 细胞中的 PAR2,15 而在血小板上,PAR1 可能与 PAR4 形成异二聚体。 12
In this issue, Sevigny and colleagues demonstrate that a protease-activated receptor (PAR) 1–PAR2 heterodimer regulates vascular smooth muscle cell (VSMC) hyperplasia following vascular injury. 1 PARs belong to a family of G-protein coupled receptors that are proteolytically activated by a variety of proteases. 2, 3 Cleavage of PARs results in intracellular signaling mediated by activation of various G proteins including G12/13, Gq, and Gi. 2, 4–6 The PAR family consists of 4 members, PAR1–PAR4, with PARs 1, 3, and 4 being primarily activated by thrombin, whereas PAR2 is activated by trypsin and tryptase. 2, 3 PAR1, originally identified as a thrombin receptor on platelets, is widely expressed and has been shown to regulate a multitude of physiological processes including platelet activation, 7, 8 regulation of the endothelial cell barrier function, 9 and proliferation and dedifferentiation of VSMCs. 10, 11 In addition to PAR1, these cells express other PARs. 6 Importantly members of PAR family can physically interact and signal as functional heterodimers in order to regulate cell growth, proliferation, and activation. 12–15 PAR1, for example, has been shown to transactivate PAR2 in human endothelial and COS-7 cells, 15 whereas on the platelet PAR1 may heterodimerize with PAR4. 12