Document Detail


Effects of a kinin antagonist on mean blood pressure.
MedLine Citation:
PMID:  3346068     Owner:  NLM     Status:  MEDLINE    
Abstract/OtherAbstract:
Administration of high doses of a kinin antagonist produces an increase in blood pressure. Thus, endogenous kinins may be involved in the regulation of blood pressure. Kinins can induce the release of vasoactive substances such as catecholamines, renin, vasopressin, histamine, and prostaglandins. To determine whether the blood pressure changes induced by high doses of kinin antagonist are due to agonistic activity mediated by these vasoactive substances, we studied the effect on blood pressure of a kinin antagonist (DArg0-Hyp3-Thi5,8-DPhe7-bradykinin) administered to control, nephrectomized, and adrenalectomized rats, and to rats treated with vasopressin V1-receptor antagonist, ganglionic and alpha- and beta-adrenergic receptor blockers (either separately or combined), histamine H1- and H2-receptor blockers, and indomethacin, a prostaglandin synthesis inhibitor. Blood pressure changes were monitored on awake, restrained rats. In the control rat, the kinin antagonist injected as a bolus (4 mg/kg) into the ascending aorta produced a transient biphasic blood pressure response, first a pressor effect (delta BP = 7 +/- 1 mm Hg; p less than 0.05), then a depressor effect (delta BP = -20 +/- 6 mm Hg; p less than 0.05). The pressor response to the kinin antagonist was not affected by any of the treatments; however, the depressor effect of the kinin antagonist appeared to be caused by the release of vasodilator prostanoids from the kidney, since it was not observed in the nephrectomized rats or in those treated with indomethacin. The pressor effect induced by the kinin antagonist suggests that kinins may contribute to the regulation of blood pressure.
Authors:
L F Carbonell; O A Carretero; P Madeddu; A G Scicli
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Publication Detail:
Type:  Journal Article; Research Support, U.S. Gov't, P.H.S.    
Journal Detail:
Title:  Hypertension     Volume:  11     ISSN:  0194-911X     ISO Abbreviation:  Hypertension     Publication Date:  1988 Feb 
Date Detail:
Created Date:  1988-04-11     Completed Date:  1988-04-11     Revised Date:  2007-11-14    
Medline Journal Info:
Nlm Unique ID:  7906255     Medline TA:  Hypertension     Country:  UNITED STATES    
Other Details:
Languages:  eng     Pagination:  I84-8     Citation Subset:  IM    
Affiliation:
Hypertension Research Division, Henry Ford Hospital, Detroit, Michigan 48202.
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MeSH Terms
Descriptor/Qualifier:
Adrenal Glands / physiology
Animals
Blood Pressure / drug effects*
Bradykinin / analogs & derivatives*
Consciousness
Kidney / physiology
Kinins / antagonists & inhibitors*,  physiology
Oligopeptides / pharmacology*
Pressoreceptors / drug effects,  physiology
Rats
Grant Support
ID/Acronym/Agency:
HL-28982/HL/NHLBI NIH HHS
Chemical
Reg. No./Substance:
0/Kinins; 0/Oligopeptides; 103412-42-6/B 4162; 58-82-2/Bradykinin

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


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