Document Detail


Renin release in rats during blockade of nitric oxide synthesis.
MedLine Citation:
PMID:  8024020     Owner:  NLM     Status:  MEDLINE    
Abstract/OtherAbstract:
The influence of renal perfusion pressure on renin release was examined in rats administered the nitric oxide synthase inhibitor NG-nitro-L-arginine methyl ester (L-NAME). Compared with the control plasma renin of 6.0 +/- 0.7 ng angiotensin I (ANG I).ml-1.h-1, plasma renin activity was suppressed (1.8 +/- 0.2 ng ANG I.ml-1.h-1, P < 0.05) in L-NAME-treated animals in which the renal perfusion pressure was permitted to increase and reached 141 +/- 8 mmHg. Plasma renin activity also was suppressed (2.5 +/- 0.4 ng ANG I.ml-1.h-1, P < 0.05) in a second L-NAME-treated group in which the renal perfusion pressure was controlled to a level of 105 +/- 5 mmHg via tightening of a suprarenal aortic snare. Plasma renin activity was increased (12.0 +/- 1.4 ng ANG I.ml-1.h-1, P < 0.05) in a third L-NAME-treated group in which renal perfusion pressure was reduced to 59 +/- 1 mmHg. Overall, these findings suggest that the intrarenal pressure-sensing mechanism for renin release does not stringently require nitric oxide synthesis. In a second experimental series, bilaterally renal-denervated rats were administered L-NAME, and again plasma renin activity was suppressed significantly whether renal perfusion pressure was permitted to increase or was controlled. Thus L-NAME also suppressed plasma renin activity independently of reflex reductions in renal neuroadrenergic activity even when renal perfusion pressure was controlled. Infusions of sodium nitroprusside completely inhibited L-NAME-induced suppression of plasma renin activity in these renal-denervated rats. Nitric oxide may function as a paracrine stimulatory mechanism for the local regulation of renin release.
Authors:
R A Johnson; R H Freeman
Publication Detail:
Type:  Journal Article    
Journal Detail:
Title:  The American journal of physiology     Volume:  266     ISSN:  0002-9513     ISO Abbreviation:  Am. J. Physiol.     Publication Date:  1994 Jun 
Date Detail:
Created Date:  1994-08-02     Completed Date:  1994-08-02     Revised Date:  2003-11-14    
Medline Journal Info:
Nlm Unique ID:  0370511     Medline TA:  Am J Physiol     Country:  UNITED STATES    
Other Details:
Languages:  eng     Pagination:  R1723-9     Citation Subset:  IM    
Affiliation:
Department of Physiology, University of Missouri School of Medicine, Columbia 65212.
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MeSH Terms
Descriptor/Qualifier:
Animals
Arginine / analogs & derivatives,  pharmacology
Denervation
Kidney / innervation
Male
NG-Nitroarginine Methyl Ester
Nitric Oxide / antagonists & inhibitors*
Nitroprusside / pharmacology
Perfusion
Pressure
Rats
Rats, Sprague-Dawley
Renal Circulation
Renin / blood*
Chemical
Reg. No./Substance:
10102-43-9/Nitric Oxide; 15078-28-1/Nitroprusside; 50903-99-6/NG-Nitroarginine Methyl Ester; 74-79-3/Arginine; EC 3.4.23.15/Renin

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


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