Document Detail


Plasma renin activity during hypotensive responses to electrical stimulation carotid sinus nerves in conscious dogs.
MedLine Citation:
PMID:  8156648     Owner:  NLM     Status:  MEDLINE    
Abstract/OtherAbstract:
1. The interaction of electrical stimulation of the carotid sinus nerves (carotid sinus nerve stimulation, CSNS) with mechanisms of renin release was studied in conscious and unrestrained resting beagle dogs receiving a standardized diet (sodium intake, 4.5 mmol/kg bodyweight (bw); water intake, 91 mL/kg bw). 2. By CSNS, mean arterial blood pressure (MAP) was lowered for periods of 20 min to levels between 101 +/- 4 and 56 +/- 5 mmHg. 3. In another group of conscious dogs, renal perfusion pressure (RPP) was lowered to 95 +/- 4 mmHg for periods of 20 min by partial suprarenal aortic occlusion in order to assess the influence of a reduced RPP on plasma renin activity (PRA) without concomitant CSNS. 4. During CSNS, PRA increased markedly (> 100%) only when MAP was reduced below 75 mmHg. 5. With aortic constriction and an RPP of 95 mmHg, the increase in PRA was 955%, which is more than three-fold higher than the increase in PRA during CSNS at MAP levels < 65 mmHg (314%). 6. The observed responses indirectly support the hypothesis that basal activity in efferent renal nerve discharge is present even at rest and can be inhibited by CSNS, and furthermore suggests that CSNS attenuated the pressure-dependent renin release.
Authors:
T K Peters; G Kaczmarczyk
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Publication Detail:
Type:  Journal Article    
Journal Detail:
Title:  Clinical and experimental pharmacology & physiology     Volume:  21     ISSN:  0305-1870     ISO Abbreviation:  Clin. Exp. Pharmacol. Physiol.     Publication Date:  1994 Jan 
Date Detail:
Created Date:  1994-05-17     Completed Date:  1994-05-17     Revised Date:  2003-11-14    
Medline Journal Info:
Nlm Unique ID:  0425076     Medline TA:  Clin Exp Pharmacol Physiol     Country:  AUSTRALIA    
Other Details:
Languages:  eng     Pagination:  1-8     Citation Subset:  IM    
Affiliation:
Institut für Physiologie, Freien Universität Berlin, Germany.
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MeSH Terms
Descriptor/Qualifier:
Animals
Aorta
Blood Pressure*
Carotid Sinus / innervation*
Dogs
Electric Stimulation
Female
Heart Rate
Renal Circulation
Renin / blood*
Vasoconstriction
Chemical
Reg. No./Substance:
EC 3.4.23.15/Renin

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


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