Document Detail


Central depressor effects of amino acids in conscious normotensive and two-kidney, one-clip renovascular hypertensive rats.
MedLine Citation:
PMID:  1803055     Owner:  NLM     Status:  MEDLINE    
Abstract/OtherAbstract:
The circulatory effects of intracisternal injections of amino acids were investigated in conscious normotensive control rats (NCR) and in two-kidney, one-clip renovascular hypertensive rats (RHR). Arterial pressure was measured with an indwelling catheter connected to a pressure transducer. Heart rate was counted from the arterial pulse. The intracisternal injection of glycine, gamma-aminobutyric acid (GABA), taurine, serine, alanine, and sarcosine decreased blood pressure by an average of 16-30 mmHg in NCR and by an average of 32-55 mmHg in RHR. Both absolute and percent changes of depressor effects by GABA, taurine, serine, and alanine were larger in RHR than in NCR. All these amino acids also showed similar bradycardiac effects in both NCR and RHR, when compared in absolute values. The percent change of bradycardia induced by taurine and sarcosine was larger in RHR than in NCR. However, the degree of bradycardia by serine was larger in NCR than in RHR. These results suggest that serine, alanine, and sarcosine in addition to glycine, GABA, and taurine, play important roles in blood pressure control in conscious normotensive rats via central neural mechanisms and that the hypertension in renovascular hypertensive rats may involve a central abnormality.
Authors:
Y Takemoto
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Publication Detail:
Type:  Comparative Study; Journal Article; Research Support, Non-U.S. Gov't    
Journal Detail:
Title:  The Japanese journal of physiology     Volume:  41     ISSN:  0021-521X     ISO Abbreviation:  Jpn. J. Physiol.     Publication Date:  1991  
Date Detail:
Created Date:  1992-04-30     Completed Date:  1992-04-30     Revised Date:  2007-03-21    
Medline Journal Info:
Nlm Unique ID:  2985184R     Medline TA:  Jpn J Physiol     Country:  JAPAN    
Other Details:
Languages:  eng     Pagination:  717-24     Citation Subset:  IM    
Affiliation:
Department of Physiology, Hiroshima University School of Medicine, Japan.
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MeSH Terms
Descriptor/Qualifier:
Amino Acids / pharmacology*
Animals
Blood Pressure / drug effects
Cisterna Magna / drug effects,  physiopathology*
Heart Rate / drug effects
Hypertension, Renovascular / physiopathology*
Injections
Male
Rats
Rats, Inbred Strains
Chemical
Reg. No./Substance:
0/Amino Acids

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


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