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Regulation of Rho Signaling by S-Nitrosothiols

S-亚硝基硫醇对 Rho 信号传导的调节

基本信息

批准号：
8235748
负责人：
A RICHARD WHORTON
金额：
$ 30.89万
依托单位：
DUKE UNIVERSITY
依托单位国家：
美国
项目类别：
财政年份：
2009
资助国家：
美国
起止时间：
2009-01-01 至 2013-04-30
项目状态：
已结题

来源：
https://reporter.nih.gov/project-details/8235748
关键词：
Acute Angiotensin II Animal Model Antiatherogenic Aorta Atherosclerosis Blood Circulation Blood Pressure Blood Vessels Cardiovascular Diseases Cell Adhesion Molecules Cell Communication Cell Differentiation process Cell Proliferation Cell model Cells Chronic Disease Data Development Endothelial Cells Endothelin GTP-Binding Proteins Genes Goals Guanosine Triphosphate Hypertension Hypertrophy Hypoxia Inbred SHR Rats Lead Lesion Leukocytes Lung Mediating Mediator of activation protein Membrane Modification Molecular Models Mus Muscle Contraction Nitric Oxide Nitric Oxide Pathway Nuclear Pathway interactions Patients Phosphorylation Play Prevention Production Proteins Pulmonary Hypertension Rattus Regulation Research Rho-associated kinase Role S-Nitrosothiols Signal Pathway Signal Transduction Smooth Muscle Smooth Muscle Myocytes Therapeutic Thrombin Thromboplastin Thromboxane A2 Tissues Vascular remodeling Vasoconstrictor Agents Vasodilation base blood pressure regulation cell motility design in vivo inflammatory marker insight kinase inhibitor migration molecular modeling myosin phosphatase novel pressure prevent rho rhoA GTP-Binding Protein vascular inflammation vasoconstriction

项目摘要

Small GTP binding proteins of the ras superfamily are recognized to play a key role in development of cardiovascular disease. In this regard Rho proteins are particularly important. For example RhoA signaling through Rho-kinases regulate diverse vascular functions including smooth muscle contraction and migration, leukocyte-endothelial cell interactions, tissue factor expression, cell differentiation and cell proliferation. The Rho pathway is activated by vasoactive agonist including angiotensin II, endothelin I, thrombin, thromboxane A2, etc., whose over-activity is commonly associated with cardiovascular disease and contributes to systemic and pulmonary hypertension, vascular inflammation, and atherosclerosis. Rho pathway activation can be seen early in development of hypertension and Rho-kinase inhibitors relax vascular tissues, reduce blood pressure and inhibit smooth muscle proliferation and vascular remodeling. In contrast to RhoA activation, derivatives of nitric oxide (NO) reduce blood pressure, inhibit thrombogenesis, inhibit smooth muscle proliferation and generally play an anti- atherogenic role. S-nitrosothiols occuring in the circulation may be particulary important for these effects. Interactions between the RhoA pathway and NO production have recently emerged with the demonstration that decreased NO synthesis leads to increased RhoA signaling. While the mechanisms for this effect is not known, we have recently found that S-nitrosothiols derived from NO, oxidize and reversibly inhibit GDP- GTP exchange in purified RhoA protein, inhibit translocation of RhoA to the membrane and block modification of downstream targets of Rho-kinase. The potential implications of these findings is that NO-derivatives such as S-nitrosothiols oppose mechanisms dependent on RhoA/Rho-kinase activation. Thus our hypothesis is that S-nitrosothiols negatively regulate Rho signaling protecting the vascularture from pro-atherogenic mechanisms. We will investigate this hypothesis using molecular, cellular and animal models. Data gathered from these studies will have important implications and suggest new mechanisms through which nitric oxide regulates vascular function. In addtion, pharmacologic approaches based on S-nitrosothiols are feasible and may lead to new therapies which may include acute treatment of hypertensive disorders and chronic treatment of complications associated with atherosclerosis.

ras超家族的小GTP结合蛋白被认为在

项目成果

期刊论文数量（3）

专著数量（0）

科研奖励数量（0）

会议论文数量（0）

专利数量（0）

Reductive ligation mediated one-step disulfide formation of S-nitrosothiols.

DOI：
10.1021/ol101863s
发表时间：
2010-09-17
期刊：
ORGANIC LETTERS
影响因子：
5.2
作者：
Zhang, Jiming;Li, Sheng;Zhang, Dehui;Wang, Hua;Whorton, A. Richard;Xian, Ming
通讯作者：
Xian, Ming

Reaction based fluorescent probes for hydrogen sulfide.

DOI：
10.1021/ol3008183
发表时间：
2012-04-20
期刊：
Organic letters
影响因子：
5.2
作者：
Liu C;Peng B;Li S;Park CM;Whorton AR;Xian M
通讯作者：
Xian M

Direct methods for detection of protein S-nitrosylation.

DOI：
10.1016/j.ymeth.2013.04.018
发表时间：
2013-08-01
期刊：
METHODS
影响因子：
4.8
作者：
Devarie-Baez, Nelmi O.;Zhang, Dehui;Li, Sheng;Whorton, A. Richard;Xian, Ming
通讯作者：
Xian, Ming