Document Detail


Are prostaglandins involved in atrial natriuretic peptide mechanisms of cardiovascular control?
MedLine Citation:
PMID:  10535695     Owner:  NLM     Status:  MEDLINE    
Abstract/OtherAbstract:
Atrial natriuretic peptide (ANP) can excite cardiac nerve endings and invoke a decrease in arterial blood pressure and a reduction in renal sympathetic nerve activity. Our laboratory has previously demonstrated that this renal depressor reflex was invoked by systemic injection of ANP and not by the direct application of ANP to the epicardium, a major locus for vagal afferents. We now examine whether inhibition of prostaglandin synthesis impairs reflex responses that are normally associated with ANP injections. Renal sympathetic nerve activity, arterial blood pressure, and heart rate were recorded in anesthetized rats. Indomethacin was used to inhibit prostaglandin synthesis through the cyclooxygenase pathway. The ANP-mediated decrease in arterial blood pressure and renal sympathetic nerve activity, observed when prostaglandin synthesis was inhibited, did not differ significantly from the decreases observed in these parameters when prostaglandin synthesis was not inhibited. Heart rate remained unchanged. Our results suggest that the sympatho-inhibitory effects of ANP do not require prostaglandins as intermediary compounds.
Authors:
K S Bandali; U Ackermann
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Publication Detail:
Type:  Journal Article; Research Support, Non-U.S. Gov't    
Journal Detail:
Title:  Canadian journal of physiology and pharmacology     Volume:  77     ISSN:  0008-4212     ISO Abbreviation:  Can. J. Physiol. Pharmacol.     Publication Date:  1999 Mar 
Date Detail:
Created Date:  1999-11-04     Completed Date:  1999-11-04     Revised Date:  2006-11-15    
Medline Journal Info:
Nlm Unique ID:  0372712     Medline TA:  Can J Physiol Pharmacol     Country:  CANADA    
Other Details:
Languages:  eng     Pagination:  211-5     Citation Subset:  IM    
Affiliation:
Department of Physiology, University of Toronto, ON, Canada.
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MeSH Terms
Descriptor/Qualifier:
Animals
Atrial Natriuretic Factor / pharmacology*
Blood Pressure / drug effects*
Cyclooxygenase 2
Heart Rate / drug effects*
Isoenzymes / physiology
Kidney / innervation
Male
Prostaglandin-Endoperoxide Synthases / physiology
Prostaglandins / physiology*
Rats
Rats, Sprague-Dawley
Sympathetic Nervous System / drug effects
Chemical
Reg. No./Substance:
0/Isoenzymes; 0/Prostaglandins; 85637-73-6/Atrial Natriuretic Factor; EC 1.14.99.1/Cyclooxygenase 2; EC 1.14.99.1/Prostaglandin-Endoperoxide Synthases

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


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