Document Detail


Endothelium-derived relaxing factor regulates renin release in vivo.
MedLine Citation:
PMID:  1510122     Owner:  NLM     Status:  MEDLINE    
Abstract/OtherAbstract:
Endothelium-derived relaxing factor (EDRF), through its inhibitory second messenger guanosine 3',5'-cyclic monophosphate (cGMP), inhibits renin release in vitro. To determine whether EDRF affects renin in vivo, we tested whether EDRF synthesis inhibition could stimulate renin secretion in intact rats. Because EDRF synthesis inhibition increases blood pressure and consequently withdraws sympathetic activity (both renin inhibitory signals), we also studied the effect of L-N omega-nitroarginine methyl ester (L-NAME) when renal perfusion pressure was controlled and during beta-adrenergic blockade. Mean blood pressure (BP), heart rate (HR), and plasma renin activity (PRA) were measured in anesthetized rats before and after EDRF synthesis inhibition by a 10 mg/kg body wt bolus of L-NAME. L-NAME decreased PRA by 67% [from 11.0 +/- 2.7 to 3.7 +/- 0.8 ng angiotensin I (ANG I).ml-1.h-1, n = 12; P less than 0.001], increased BP by 20 +/- 2 mmHg (P less than 0.001), and decreased HR from 332 +/- 8 to 312 +/- 9 beats/min (P less than 0.005). We repeated our experiment in rats instrumented with an intra-aortic balloon catheter to control renal perfusion pressure and pretreated with propranolol to eliminate the beta-adrenergic effect. Under these conditions, L-NAME now increased PRA by 55% (from 6.9 +/- 1.9 to 10.8 +/- 2.6 ng ANG I.ml-1.h-1, n = 12; P less than 0.02), whereas renal perfusion pressure was unchanged (91 +/- 4 vs. 90 +/- 4 mmHg). HR increased slightly from 308 +/- 5 to 315 +/- 3 beats/min (P less than 0.005).(ABSTRACT TRUNCATED AT 250 WORDS)
Authors:
D H Sigmon; O A Carretero; W H Beierwaltes
Publication Detail:
Type:  Journal Article; Research Support, U.S. Gov't, P.H.S.    
Journal Detail:
Title:  The American journal of physiology     Volume:  263     ISSN:  0002-9513     ISO Abbreviation:  Am. J. Physiol.     Publication Date:  1992 Aug 
Date Detail:
Created Date:  1992-09-22     Completed Date:  1992-09-22     Revised Date:  2007-11-14    
Medline Journal Info:
Nlm Unique ID:  0370511     Medline TA:  Am J Physiol     Country:  UNITED STATES    
Other Details:
Languages:  eng     Pagination:  F256-61     Citation Subset:  IM    
Affiliation:
Hypertension and Vascular Research Division, Henry Ford Hospital, Detroit, Michigan 48202.
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MeSH Terms
Descriptor/Qualifier:
Animals
Arginine / analogs & derivatives,  pharmacology
Blood Pressure / drug effects
Feedback
Heart Rate / drug effects
Kidney Glomerulus / physiology
Kidney Tubules / physiology
Male
NG-Nitroarginine Methyl Ester
Nitric Oxide / physiology*
Propranolol / pharmacology
Rats
Rats, Inbred Strains
Renal Circulation
Renin / blood*
Grant Support
ID/Acronym/Agency:
HL-28982/HL/NHLBI NIH HHS
Chemical
Reg. No./Substance:
10102-43-9/Nitric Oxide; 50903-99-6/NG-Nitroarginine Methyl Ester; 525-66-6/Propranolol; 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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