Document Detail


Analysis of responses to bradykinin and influence of HOE 140 in the isolated perfused rat lung.
MedLine Citation:
PMID:  8024007     Owner:  NLM     Status:  MEDLINE    
Abstract/OtherAbstract:
The inhibitory effects of HOE 140, a novel bradykinin B2 receptor antagonist, on pulmonary vascular and airway responses to bradykinin (BK) were investigated under conditions of controlled pulmonary blood flow and ventilation and constant left atrial pressure in the isolated blood-perfused rat lung. Under baseline conditions, BK produced dose-related increases in pulmonary arterial perfusion pressure without changing airway pressure. However, when pulmonary arterial pressure was raised to a high steady level, increases in pulmonary arterial pressure in response to BK were enhanced and BK then produced dose-related increases in airway pressure. Responses to BK were reproducible with respect to time and were not different when the inspired fraction of O2 was 0.21 or 0.95 and HOE 140 was 0.8 nM/ml (50 micrograms/kg) and decreased both pulmonary vascular and airway responses to the peptide. HOE 140 had no significant effect on pulmonary vascular responses to angiotensin II, serotonin, nitric oxide, sodium nitroprusside, albuterol, or pinacidil. Additionally, in these experiments, HOE 140 had no effect on the pulmonary arterial pressor response to ventilatory hypoxia. These results suggest BK has significant vasoconstrictor and bronchoconstrictor effects that are mediated by B2 receptors and are dependent on the baseline level of tone in the airways and in the pulmonary vascular bed. The present results suggest that HOE 140 is a highly selective, BK B2 receptor antagonist in the pulmonary vascular bed of the rat. These data also suggest that HOE 140 may be a useful probe for studying the role of BK in the pulmonary vascular bed in physiological and pathophysiological conditions.
Authors:
B D Nossaman; C J Feng; P J Kadowitz
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Publication Detail:
Type:  Comparative Study; In Vitro; Journal Article    
Journal Detail:
Title:  The American journal of physiology     Volume:  266     ISSN:  0002-9513     ISO Abbreviation:  Am. J. Physiol.     Publication Date:  1994 Jun 
Date Detail:
Created Date:  1994-08-02     Completed Date:  1994-08-02     Revised Date:  2006-11-15    
Medline Journal Info:
Nlm Unique ID:  0370511     Medline TA:  Am J Physiol     Country:  UNITED STATES    
Other Details:
Languages:  eng     Pagination:  H2452-61     Citation Subset:  IM    
Affiliation:
Department of Anesthesiology, Tulane University Medical School, New Orleans, Louisiana 70112-2699.
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MeSH Terms
Descriptor/Qualifier:
15-Hydroxy-11 alpha,9 alpha-(epoxymethano)prosta-5,13-dienoic Acid
Animals
Arginine / analogs & derivatives,  pharmacology
Blood Pressure / drug effects
Bradykinin / analogs & derivatives*,  antagonists & inhibitors,  pharmacology*
Captopril / pharmacology
Lung / drug effects*
Male
Meclofenamic Acid / pharmacology
NG-Nitroarginine Methyl Ester
Oxygen
Perfusion
Prostaglandin Endoperoxides, Synthetic / pharmacology
Pulmonary Artery / drug effects
Rats
Rats, Sprague-Dawley
Respiration / drug effects
Thromboxane A2 / analogs & derivatives,  pharmacology
Chemical
Reg. No./Substance:
0/Prostaglandin Endoperoxides, Synthetic; 130308-48-4/icatibant; 50903-99-6/NG-Nitroarginine Methyl Ester; 57576-52-0/Thromboxane A2; 58-82-2/Bradykinin; 62571-86-2/Captopril; 644-62-2/Meclofenamic Acid; 74-79-3/Arginine; 76898-47-0/15-Hydroxy-11 alpha,9 alpha-(epoxymethano)prosta-5,13-dienoic Acid; 7782-44-7/Oxygen

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


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