Document Detail


Autoregulatory vasodilation enhances renal prostaglandin E2 and associated renin release during arachidonic acid infusion in dogs.
MedLine Citation:
PMID:  3925129     Owner:  NLM     Status:  MEDLINE    
Abstract/OtherAbstract:
To examine whether autoregulatory dilation of preglomerular vessels enhances prostaglandin (PG)E2 and renin release during arachidonic acid infusion, the ureter was occluded or the renal artery constricted in anesthetized dogs. Intrarenal arachidonic acid infusion (40 micrograms X kg-1 X min-1) increased PGE2 release by 41 +/- 17 pmol/min at control pressures and by 149 +/- 60 pmol/min during ureteral occlusion. Arachidonic acid infusion (160 micrograms X kg-1 X min-1) increased PGE2 release by 149 +/- 60 pmol/min at control pressures, by 505 +/- 211 pmol/min during ureteral occlusion and by 581 +/- 201 pmol/min during renal arterial constriction. Thus, PGE2 release during arachidonic acid infusion was trebled by autoregulatory dilation. Arachidonic acid infusion (160 micrograms X kg-1 X min-1) raised renin release by 6 +/- 2 micrograms of angiotensin I per min at control pressures, by 25 +/- 9 micrograms of angiotensin I per min during renal arterial constriction and during ureteral occlusion by 16 +/- 4 micrograms of angiotensin I per min, which was not significantly higher than induced by the lower rate of infusion. Arachidonic acid infusion (160 micrograms X kg-1 X min-1) raised renal blood flow by 54 +/- 5% at control pressures but exerted no vasoactive effect during ureteral occlusion and renal arterial constriction. We conclude that autoregulatory dilation enhances the stimulatory effects of arachidonic acid on renal PG synthesis. Both increased intrarenal PG concentration and autoregulatory dilation may contribute to enhancement of renin release. The stimulatory effects of arachidonic acid on PG synthesis and renin release are independent of the vasoactive effects of arachidonic acid.
Authors:
A Vikse; O M Sejersted; F Kiil
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Publication Detail:
Type:  Journal Article; Research Support, Non-U.S. Gov't    
Journal Detail:
Title:  The Journal of pharmacology and experimental therapeutics     Volume:  234     ISSN:  0022-3565     ISO Abbreviation:  J. Pharmacol. Exp. Ther.     Publication Date:  1985 Jul 
Date Detail:
Created Date:  1985-08-20     Completed Date:  1985-08-20     Revised Date:  2006-11-15    
Medline Journal Info:
Nlm Unique ID:  0376362     Medline TA:  J Pharmacol Exp Ther     Country:  UNITED STATES    
Other Details:
Languages:  eng     Pagination:  261-6     Citation Subset:  IM    
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MeSH Terms
Descriptor/Qualifier:
Animals
Arachidonic Acid
Arachidonic Acids / pharmacology*
Blood Pressure / drug effects
Dinoprostone
Dogs
Female
Glomerular Filtration Rate / drug effects
Homeostasis*
Male
Prostaglandins E / secretion*
Renal Artery Obstruction / physiopathology
Renal Circulation / drug effects
Renin / secretion*
Ureteral Obstruction / physiopathology
Vasodilation / drug effects*
Chemical
Reg. No./Substance:
0/Arachidonic Acids; 0/Prostaglandins E; 363-24-6/Dinoprostone; 506-32-1/Arachidonic Acid; EC 3.4.23.15/Renin

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


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