Document Detail


Comparison of responses to adrenomedullin and calcitonin gene-related peptide in the pulmonary vascular bed of the cat.
MedLine Citation:
PMID:  8088349     Owner:  NLM     Status:  MEDLINE    
Abstract/OtherAbstract:
Pulmonary vascular responses to the newly discovered hypotensive peptide, adrenomedullin, were compared with responses to the structurally related peptides, calcitonin gene-related peptide (CGRP) and amylin, in the intact-chest cat. Under conditions of controlled blood flow, when tone in the pulmonary vascular bed had been raised to a high steady level, intralobar injections of adrenomedullin (0.03-1 nmol), CGRP (0.1-3 nmol), and amylin (0.1 and 0.3 nmol) caused dose-related decreases in lobar arterial pressure without changing left atrial pressure. In terms of relative vasodilator activity in the pulmonary vascular bed, the dose of the peptide that decreased lobar arterial pressure 7.5 mm Hg (ED7.5 mm Hg) was significantly lower for adrenomedullin than for CGRP. The duration of the pulmonary vasodilator responses to CGRP was longer than for adrenomedullin, and both peptides decreased systemic arterial pressure when injected into the perfused lobar artery in the higher doses studied. The present data demonstrate that synthetic human adrenomedullin and CGRP have potent but relatively short-lasting vasodilator activity in the pulmonary vascular bed. These data show also that amylin, a structurally related pancreatic peptide, also has significant pulmonary vasodilator activity.
Authors:
B J DeWitt; D Y Cheng; G N Caminiti; B D Nossaman; D H Coy; W A Murphy; P J Kadowitz
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Publication Detail:
Type:  Comparative Study; Journal Article; Research Support, Non-U.S. Gov't; Research Support, U.S. Gov't, P.H.S.    
Journal Detail:
Title:  European journal of pharmacology     Volume:  257     ISSN:  0014-2999     ISO Abbreviation:  Eur. J. Pharmacol.     Publication Date:  1994 May 
Date Detail:
Created Date:  1994-10-18     Completed Date:  1994-10-18     Revised Date:  2007-11-14    
Medline Journal Info:
Nlm Unique ID:  1254354     Medline TA:  Eur J Pharmacol     Country:  NETHERLANDS    
Other Details:
Languages:  eng     Pagination:  303-6     Citation Subset:  IM    
Affiliation:
Department of Pharmacology, Tulane University School of Medicine, New Orleans, LA 70112.
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MeSH Terms
Descriptor/Qualifier:
Adrenomedullin
Amyloid / pharmacology
Animals
Antihypertensive Agents / pharmacology*
Blood Pressure / drug effects*
Calcitonin Gene-Related Peptide / pharmacology*
Cats
Dose-Response Relationship, Drug
Female
Lung / blood supply
Male
Peptides / pharmacology*
Pulmonary Artery / drug effects
Pulmonary Veins / drug effects
Vasodilation / drug effects*
Grant Support
ID/Acronym/Agency:
HL15580/HL/NHLBI NIH HHS
Chemical
Reg. No./Substance:
0/Amyloid; 0/Antihypertensive Agents; 0/Peptides; 106602-62-4/amylin; 148498-78-6/Adrenomedullin; 83652-28-2/Calcitonin Gene-Related Peptide

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


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