Activation of TRPV1 by dietary capsaicin improves endothelium-dependent vasorelaxation and prevents hypertension.

Activation of TRPV1 by dietary capsaicin improves endothelium-dependent vasorelaxation and prevents hypertension.
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DOI:
10.1016/j.cmet.2010.05.015
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发表时间:
2010-08-04
期刊:
影响因子:
29
通讯作者:
Zhu Z
Zhu Z
中科院分区:
生物学1区
文献类型:
--
作者:
Yang D;Luo Z;Ma S;Wong WT;Ma L;Zhong J;He H;Zhao Z;Cao T;Yan Z;Liu D;Arendshorst WJ;Huang Y;Tepel M;Zhu Z

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一些植物性饮食可以降低心脏代谢风险和高血压患病率。新证据表明瞬时受体电位香草酸 1 (TRPV1) 阳离子通道在心脏代谢疾病的发病机制中发挥作用。关于长期 TRPV1 激活对血管功能和血压调节的影响知之甚少。在这里,我们报告说,膳食辣椒素对 TRPV1 的慢性激活会增加蛋白激酶 A (PKA) 和 eNOS 的磷酸化,从而增加内皮细胞中一氧化氮 (NO) 的产生,而一氧化氮 (NO) 是钙依赖性的。辣椒素激活 TRPV1 可增强野生型小鼠的内皮依赖性松弛,而 TRPV1 缺陷型小鼠则没有这种效果。长期刺激TRPV1可以激活PKA,从而有助于增加eNOS磷酸化,改善血管舒张,并降低遗传性高血压大鼠的血压。我们得出的结论是,膳食辣椒素激活 TRPV1 可改善内皮功能。 TRPV1 介导的 NO 产生增加可能是高血压治疗干预的一个有希望的目标。
Some plant-based diets lower the cardiometabolic risks and prevalence of hypertension. New evidence implies a role for the transient receptor potential vanilloid 1 (TRPV1) cation channel in the pathogenesis of cardiometabolic diseases. Little is known about impact of chronic TRPV1 activation on the regulation of vascular function and blood pressure. Here we report that chronic TRPV1 activation by dietary capsaicin increases the phosphorylation of protein kinase A (PKA) and eNOS and thus production of nitric oxide (NO) in endothelial cells, which is calcium dependent. TRPV1 activation by capsaicin enhances endothelium-dependent relaxation in wild-type mice, an effect absent in TRPV1-deficient mice. Long-term stimulation of TRPV1 can activate PKA, which contributes to increased eNOS phosphorylation, improves vasorelaxation, and lowers blood pressure in genetically hypertensive rats. We conclude that TRPV1 activation by dietary capsaicin improves endothelial function. TRPV1-mediated increase in NO production may represent a promising target for therapeutic intervention of hypertension.
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