Document Detail


Prostaglandins, catecholamines, and cardiovascular responses to hemorrhage.
MedLine Citation:
PMID:  7212088     Owner:  NLM     Status:  MEDLINE    
Abstract/OtherAbstract:
The effects of prostaglandins (PGE2 and 16,16-dimethyl-PGE1) on epinephrine (E) and norepinephrine (NE) release, in response to a hypotensive stimulus (bleeding 5 ml/300 g), were studied in relation to blood pressure and heart rate responses in the rat. PGE2 (10 micrograms/kg-1 . min-1) and 16,16-dimethyl-PGE1 (1 microgram . kg-1 . min-1) accelerated blood pressure and heart rate recovery rate following acute hemorrhage and increased plasma E and NE levels. Plasma levels of 3-methoxy-4-hydroxyphenylglycol (MHPG) and 3,4-dihydroxyphenylglycol (DHPG) were not affected by PG infusion. In bilaterally nephrectomized rats, PGE2 increased plasma levels of E, NE, and DHPG but failed to enhance the blood pressure and had only a mild effect on heart rate recovery following bleeding. In hexamethonium-treated rats, infusion of PGE2 had a small and transient effect on blood pressure recovery, but its effect on the heart rate was not affected; NE and E levels in the plasma of the hexamethonium-treated rats were still higher in the PGE2-infused rats. These studies indicate that in the intact rat, administered PGE potentiate the release of E and NE and facilitate blood pressure and heart rate recovery following acute hemorrhage. The hemodynamic effects of the PGE appear to be mediated by a renal factor whereas the effects of PGE on E and NE response to hemorrhage are independent of the presence of intact kidneys.
Authors:
G Feuerstein; D C Jimerson; I J Kopin
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Publication Detail:
Type:  Journal Article    
Journal Detail:
Title:  The American journal of physiology     Volume:  240     ISSN:  0002-9513     ISO Abbreviation:  Am. J. Physiol.     Publication Date:  1981 Mar 
Date Detail:
Created Date:  1981-05-26     Completed Date:  1981-05-26     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:  R166-74     Citation Subset:  IM    
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MeSH Terms
Descriptor/Qualifier:
Animals
Blood Pressure
Epinephrine / blood
Heart Rate
Hemorrhage / blood,  physiopathology*
Male
Norepinephrine / blood
Prostaglandins E / pharmacology*
Rats
Sympathetic Nervous System / physiopathology*
Chemical
Reg. No./Substance:
0/Prostaglandins E; 51-41-2/Norepinephrine; 51-43-4/Epinephrine

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


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