NDLI: Effects of a novel ACE inhibitor, 3-(3-thienyl)-l-alanyl-ornithyl-proline, on endothelial vasodilation and hepatotoxicity in l-NAME-induced hypertensive rats

Content Provider	PubMed Central
Author	Seth, Mahesh Kumar Hussain, M. Ejaz Pasha, Santosh Fahim, Md
Copyright Year	2016
Abstract	Nitric oxide (NO) is a widespread biological mediator involved in many physiological and pathological processes, eg, in the regulation of vascular tone and hypertension. Chronic inhibition of NO synthase by NG-nitro-l-arginine methyl ester (l-NAME) hydrochloride results in the development of hypertension accompanied by an increase in vascular responsiveness to adrenergic stimuli. Recently, we developed a novel sulfur-containing angiotensin-converting enzyme inhibitor: 3-(3-thienyl)-l-alanyl-ornithyl-proline (TOP). Our previous studies indicated a superior nature of the molecule as an antihypertensive agent in spontaneously hypertensive rats (showing the involvement of renin–angiotensin–aldosterone system) in comparison to captopril. The aim of the present study was to investigate the effect of TOP on NO pathway in l-NAME-induced hypertensive rats, and captopril was included as the standard treatment group. Treatment with both TOP (20 mg/kg) and captopril (40 mg/kg) prevented the development of hypertension in l-NAME model, but TOP showed better restoration of NO and normal levels of angiotensin-converting enzyme. In addition, in vitro vasorelaxation assay showed an improvement in endothelium-dependent vasodilation in both the cases. Further, the biochemical (malondialdehyde, alanine aminotransferase, and aspartate aminotransferase) and the histopathological effects of TOP on rat liver tissues revealed a protective nature of TOP in comparison to captopril in the l-NAME model. In conclusion, TOP at 50% lesser dose than captopril was found to be better in the l-NAME model.
Related Links	http://dx.doi.org/10.2147/dddt.s77761
Ending Page	1542
Starting Page	1533
File Format	PDF
ISSN	11778881
e-ISSN	11778881
Journal	Drug Design, Development and Therapy
Volume Number	10
Language	English
Publisher	Dove Medical Press
Publisher Date	2016-04-01
Access Restriction	Open
Rights Holder	Dove Medical Press
Subject Keyword	Pharmacology Drug Discovery Pharmaceutical Science Research in Higher Education
Content Type	Text
Resource Type	Article
Subject	Drug Discovery Pharmacology Pharmaceutical Science

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