The Rho/Rac exchange factor Vav2 controls nitric oxide-dependent responses in mouse vascular smooth muscle cells.
The Rho/Rac exchange factor Vav2 controls nitric oxide-dependent responses in mouse vascular smooth muscle cells.
复制标题
Rho/Rac 交换因子 Vav2 控制小鼠血管平滑肌细胞中的一氧化氮依赖性反应。
DOI:
10.1172/jci38356
复制
发表时间:
2010
期刊:
影响因子:
--
通讯作者:
Bustelo,XoséR
中科院分区:
文献类型:
--
作者:
Sauzeau,Vincent;Sevilla,MaríaA;Montero,MaríaJ;Bustelo,XoséR
The regulation of arterial contractility is essential for blood pressure control. The GTPase RhoA promotes vasoconstriction by modulating the cytoskeleton of vascular smooth muscle cells. Whether other Rho/Rac pathways contribute to blood pressure regulation remains unknown. By studying a hypertensive knockout mouse lacking the Rho/Rac activator Vav2, we have discovered a new signaling pathway involving Vav2, the GTPase Rac1, and the serine/threonine kinase Pak that contributes to nitric oxide–triggered blood vessel relaxation and normotensia. This pathway mediated the Pak-dependent inhibition of phosphodiesterase type 5, a process that favored RhoA inactivation and the subsequent depolymerization of the F-actin cytoskeleton in vascular smooth muscle cells. The inhibition of phosphodiesterase type 5 required its physical interaction with autophosphorylated Pak1 but, unexpectedly, occurred without detectable transphosphorylation events between those 2 proteins. The administration of phosphodiesterase type 5 inhibitors prevented the development of hypertension and cardiovascular disease in Vav2-deficient animals, demonstrating the involvement of this new pathway in blood pressure regulation. Taken together, these results unveil one cause of the cardiovascular phenotype ofVav2-knockout mice, identify a new Rac1/Pak1 signaling pathway, and provide a mechanistic framework for better understanding blood pressure control in physiological and pathological states.
登录
查看更多内容
影响因子:
5.3
作者:
Vigorito, E;Bell, S;Turner, M
通讯作者:
Turner, M
影响因子:
4.8
作者:
Sauzeau, V;Le Jeune, H;Loirand, G
通讯作者:
Loirand, G
影响因子:
32.4
作者:
Ibiza, Sales;Victor, Victor M.;Serrador, Juan M.
通讯作者:
Serrador, Juan M.
影响因子:
56.9
作者:
Kimura, K;Ito, M;Kaibuchi, K
通讯作者:
Kaibuchi, K
影响因子:
--
作者:
H. Maruta;Hongshan He;T. Nheu
通讯作者:
T. Nheu