alexa Atorvastatin prevents end-organ injury in salt-sensitive hypertension: role of eNOS and oxidant stress.

Journal of Autacoids and Hormones

Author(s): Zhou MS, Jaimes EA, Raij L

Abstract Share this page

Abstract Statins, inhibitors of cholesterol biosynthesis, are endowed with pleiotropic effects that may contribute to their favorable clinical results. Hypertensive Dahl salt-sensitive (DS) rats have endothelial dysfunction and cardiorenal injury associated with decreased NO bioavailability and increased superoxide (O2-) production linked to a functional upregulation of angiotensin II. We investigated whether atorvastatin (30 mg/kg per day; by gavage) would prevent endothelial nitric oxide (eNOS) downregulation and the increase in O2- in DS rats, thereby reducing end-organ injury. DS rats given a high-salt diet (4\% NaCl) for 10 weeks developed hypertension (systolic blood pressure [SBP] 200+/-8 versus 150+/-2 mm Hg in DS rats fed 0.5\% NaCl diet [NS]; P<0.05), impaired endothelium-dependent relaxation, functional upregulation of endothelin-1, left ventricular hypertrophy (LVH; 30\%), and proteinuria (167\%), accompanied by downregulation of aortic eNOS activity (0.7+/-0.2 versus 1.8+/-0.3 nmol/min per gram protein in NS; P<0.05) and increased aortic O2- (2632+/-316 versus 1176+/-112 counts/min per milligram in NS; P<0.05) and plasma 8-F2alpha isoprostanes. Atorvastatin prevented the decrease in eNOS activity (1.5+/-0.3 nmol/min per gram protein) as well as the increase in O2- (1192+/-243 counts/min per milligram) and plasma 8-F2alpha isoprostanes, reduced LVH and proteinuria, and normalized endothelial function and vascular response to endothelin-1, although reduction in SBP was modest (174+/-8 mm Hg). Atorvastatin combined with removal of high salt normalized aortic eNOS activity, SBP, LVH, and proteinuria. These findings strongly suggest that concomitant prevention of vascular eNOS downregulation and inhibition of oxidative stress may contribute to the protection against end-organ injury afforded by this statin in salt-sensitive hypertension. This article was published in Hypertension and referenced in Journal of Autacoids and Hormones

Relevant Expert PPTs

Relevant Speaker PPTs

Relevant Topics

Peer Reviewed Journals
Make the best use of Scientific Research and information from our 700 + peer reviewed, Open Access Journals
International Conferences 2017-18
Meet Inspiring Speakers and Experts at our 3000+ Global Annual Meetings

Contact Us

© 2008-2017 OMICS International - Open Access Publisher. Best viewed in Mozilla Firefox | Google Chrome | Above IE 7.0 version