SIRT1 regulates oxidant- and cigarette smoke-induced eNOS acetylation in endothelial cells: Role of resveratrol.

SIRT1 regulates oxidant- and cigarette smoke-induced eNOS acetylation in endothelial cells: Role of resveratrol.
复制标题

DOI:
10.1016/j.bbrc.2010.01.080
复制
发表时间:
2010-02-26
影响因子:
3.1
通讯作者:
Rahman, Irfan
Rahman, Irfan
中科院分区:
生物学4区
文献类型:
--
作者:
Arunachalam, Gnanapragasam;Yao, Hongwei;Sundar, Isaac K.;Caito, Samuel;Rahman, Irfan

文献摘要

参考文献

被引文献

相似文献

内皮型一氧化氮合酶(eNOS)在内皮细胞功能中起着至关重要的作用。SIRT1是一种NAD+依赖性脱乙酰酶,可调节内皮功能,因此内皮SIRT1的任何改变都会影响正常的血管生理学。香烟烟雾(CS)介导的氧化应激与内皮功能障碍有关。然而,SIRT1在CS和氧化剂调节eNOS中的作用尚不清楚。我们假设CS介导的氧化应激下调SIRT1,导致eNOS的乙酰化,从而导致一氧化氮(NO)介导的信号转导减少和内皮功能障碍。暴露于香烟烟雾提取物(CSE)和H2O2的人脐血管内皮细胞(HUVECs)显示SIRT1水平、活性降低,但伴随eNOS乙酰化增加的磷酸化增加。用白藜芦醇预处理内皮细胞显著减弱CSE和氧化剂介导的SIRT1水平和eNOS乙酰化。这些发现表明,氧化剂介导的SIRT1的减少与eNOS的乙酰化有关,eNOS的乙酰化在内皮功能障碍中具有意义。
Endothelial nitric oxide synthase (eNOS) plays a crucial role in endothelial cell functions. SIRT1, a NAD+-dependent deacetylase, is shown to regulate endothelial function and hence any alteration in endothelial SIRT1 will affect normal vascular physiology. Cigarette smoke (CS)-mediated oxidative stress is implicated in endothelial dysfunction. However, the role of SIRT1 in regulation of eNOS by CS and oxidants are not known. We hypothesized that CS-mediated oxidative stress downregulates SIRT1 leading to acetylation of eNOS which results in reduced nitric oxide (NO)-mediated signaling and endothelial dysfunction. Human umbilical vascular endothelial cells (HUVECs) exposed to cigarette smoke extract (CSE) and H2O2 showed decreased SIRT1 levels, activity, but increased phosphorylation concomitant with increased eNOS acetylation. Pre-treatment of endothelial cells with resveratrol significantly attenuated the CSE- and oxidant-mediated SIRT1 levels and eNOS acetylation. These findings suggest that oxidant-mediated reduction of SIRT1 is associated with acetylation of eNOS which have implications in endothelial dysfunction.
DOI: 10.1152/ajpheart.00375.2009
发表时间: 2009-11-01
影响因子: 4.8
作者:
Ungvari, Zoltan;Labinskyy, Nazar;Csiszar, Anna
通讯作者: Csiszar, Anna
DOI: 10.4161/cc.7.19.6799
发表时间: 2008-10-01
期刊: CELL CYCLE
影响因子: 4.3
作者:
Ford, Jack;Ahmed, Shafiq;Milner, Jo
通讯作者: Milner, Jo
DOI: 10.1089/ars.2009.2874
发表时间: 2010-06-01
影响因子: 6.6
作者:
Edirisinghe, Indika;Arunachalam, Gnanapragasam;Rahman, Irfan
通讯作者: Rahman, Irfan
DOI: 10.1074/jbc.m109.058628
发表时间: 2010-01-08
影响因子: 4.8
作者:
Hong, Eun-Hee;Lee, Su-Jae;Hwang, Sang-Gu
通讯作者: Hwang, Sang-Gu
DOI: 10.1097/00004872-200105000-00009
发表时间: 2001-05-01
影响因子: 4.9
作者:
Raij, L;DeMaster, EG;Jaimes, EA
通讯作者: Jaimes, EA