Document Detail


Effect of valsartan on angiotensin II- and vasopressin-degrading activities in the kidney of normotensive and hypertensive rats.
MedLine Citation:
PMID:  11561217     Owner:  NLM     Status:  MEDLINE    
Abstract/OtherAbstract:
Valsartan, a selective antagonist of angiotensin II at the AT(1) receptor subtype, is an efficacious, orally active, blood pressure-lowering agent used in hypertensive patients. Given that aminopeptidases (APs) play a major role in the metabolism of local peptides involved in blood pressure control, studying them helped us to understand cardiovascular control. We studied the effect of valsartan on angiotensin II- (GluAP) and vasopressin- (CysAP) degrading activities in the kidney in the rat model of renovascular hypertension, Goldblatt two-kidney one-clip. GluAP and CysAP in renal cortex and medulla exhibited different responses to hypertension and valsartan treatment. In the renal cortex, GluAP decreased in clipped and non-clipped kidneys of hypertensive animals. However, while hypertension did not affect GluAP in the clipped kidney medulla, the non-clipped kidney exhibited an increase in soluble and a decrease in membrane-bound activity. Valsartan decreased soluble GluAP in the medulla of normotensive and hypertensive animals. In the renal cortex, CysAP activity was mainly downregulated following hypertension. Valsartan decreased soluble CysAP activity in sham-operated, but not in hypertensive animals. The renal medulla showed a significant valsartan-related decreased activity in clipped and non-clipped kidneys of both sham-operated and hypertensive animals. These results suggest a functional relationship between the AT(1) receptor and vasopressin-degrading activity.
Authors:
I Prieto; J M Martínez; F Hermoso; M J Ramírez; M de Gasparo; F Vargas; F Alba; M Ramírez
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Publication Detail:
Type:  Journal Article    
Journal Detail:
Title:  Hormone and metabolic research = Hormon- und Stoffwechselforschung = Hormones et métabolisme     Volume:  33     ISSN:  0018-5043     ISO Abbreviation:  Horm. Metab. Res.     Publication Date:  2001 Sep 
Date Detail:
Created Date:  2001-09-18     Completed Date:  2001-12-04     Revised Date:  2009-02-19    
Medline Journal Info:
Nlm Unique ID:  0177722     Medline TA:  Horm Metab Res     Country:  Germany    
Other Details:
Languages:  eng     Pagination:  559-63     Citation Subset:  IM    
Affiliation:
Unit of Physiology, University of Jaén, Bldg. B3, 23071, Jaén, Spain.
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MeSH Terms
Descriptor/Qualifier:
Aminopeptidases / metabolism
Angiotensin II / metabolism*
Animals
Antihypertensive Agents / pharmacology*
Arginine Vasopressin / metabolism*
Blood Pressure / drug effects
Cystinyl Aminopeptidase / metabolism
Drinking / drug effects
Glutamyl Aminopeptidase
Hypertension, Renovascular / enzymology*
Kidney / drug effects*,  enzymology
Male
Placebos
Rats
Rats, Wistar
Tetrazoles / pharmacology*
Valine / analogs & derivatives*,  pharmacology*
Chemical
Reg. No./Substance:
0/Antihypertensive Agents; 0/Placebos; 0/Tetrazoles; 11128-99-7/Angiotensin II; 113-79-1/Arginine Vasopressin; 137862-53-4/valsartan; 7004-03-7/Valine; EC 3.4.11.-/Aminopeptidases; EC 3.4.11.3/Cystinyl Aminopeptidase; EC 3.4.11.7/Glutamyl Aminopeptidase

From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine


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