Document Detail


Endothelial derived relaxing factor controls renal hemodynamics in the normal rat kidney.
MedLine Citation:
PMID:  2103847     Owner:  NLM     Status:  MEDLINE    
Abstract/OtherAbstract:
These studies were conducted in the conscious, chronically catheterized rat to determine whether the endothelial derived relaxing factor (EDRF) controls renal function in the normal state. Administration of the EDRF synthesis inhibitors N-monomethyl-L-arginine (NMA; 100 mg/kg body weight) or N-nitro-L-arginine methylester (NAME; 10 mg/kg body wt) led to a large, sustained rise in blood pressure, a large rise in renal vascular resistance, a fall in renal plasma flow, a relatively slight reduction in glomerular filtration rate, and a consequent rise in filtration fraction. In addition, a marked natriuresis occurred because of a reduction in the fractional reabsorption of sodium. In separate studies, a continuous infusion of excess L-arginine (300 mg/kg body wt bolus followed by 50 mg/kg body wt per min) attenuated the NMA- or NAME-induced rise in blood pressure and reversed the renal hemodynamic effects such that a significant rise in renal plasma flow was seen. L-Arginine alone produced a selective renal vasodilation and large increases in sodium excretion. These observations support earlier suggestions that tonic release of EDRF controls the basal blood pressure and also show that renal function in the normal unstressed rat is markedly influenced by EDRF. These studies suggest that, in addition to controlling renal plasma flow, EDRF may have other, complex actions at the glomerulus. The natriuresis seen after acute inhibition of EDRF with NMA or NAME was probably the result of a pressure natriuretic response to the abrupt rise in blood pressure and also, perhaps, reflects removal of an EDRF influence to directly enhance sodium reabsorption somewhere in the nephron.
Authors:
C Baylis; P Harton; K Engels
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Publication Detail:
Type:  Journal Article; Research Support, Non-U.S. Gov't; Research Support, U.S. Gov't, P.H.S.    
Journal Detail:
Title:  Journal of the American Society of Nephrology : JASN     Volume:  1     ISSN:  1046-6673     ISO Abbreviation:  J. Am. Soc. Nephrol.     Publication Date:  1990 Dec 
Date Detail:
Created Date:  1991-10-17     Completed Date:  1991-10-17     Revised Date:  2007-11-15    
Medline Journal Info:
Nlm Unique ID:  9013836     Medline TA:  J Am Soc Nephrol     Country:  UNITED STATES    
Other Details:
Languages:  eng     Pagination:  875-81     Citation Subset:  IM    
Affiliation:
Department of Physiology, West Virginia University, Morgantown 26505.
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MeSH Terms
Descriptor/Qualifier:
Animals
Arginine / analogs & derivatives,  pharmacology
Hemodynamics / drug effects,  physiology
Male
NG-Nitroarginine Methyl Ester
Nitric Oxide / physiology*
Rats
Rats, Inbred Strains
Reference Values
Renal Circulation / drug effects,  physiology*
omega-N-Methylarginine
Grant Support
ID/Acronym/Agency:
DK 39963/DK/NIDDK NIH HHS; HL 31933/HL/NHLBI NIH HHS
Chemical
Reg. No./Substance:
10102-43-9/Nitric Oxide; 17035-90-4/omega-N-Methylarginine; 50903-99-6/NG-Nitroarginine Methyl Ester; 74-79-3/Arginine

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


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