search
for
 About Bioline  All Journals  Testimonials  Membership  News


Indian Journal of Pharmacology
Medknow Publications on behalf of Indian Pharmacological Society
ISSN: 0253-7613
EISSN: 0253-7613
Vol. 43, No. 4, 2011, pp. 445-449
Bioline Code: ph11118
Full paper language: English
Document type: Research Article
Document available free of charge

Indian Journal of Pharmacology, Vol. 43, No. 4, 2011, pp. 445-449

 en Effect of Montelukast on bradykinin-induced contraction of isolated tracheal smooth muscle of guinea pig
Noor, A.; Najmi, M. H. & Bukhtiar, S.

Abstract

Aim: To explore the effect of montelukast on bradykinin-induced tracheal smooth muscle contraction of isolated guinea pig trachea.
Study Design: To study the effect of bradykinin in the absence and in the presence of montelukast on the isolated tracheal smooth muscle of a guinea pig pretreated with indomethacin (10 -6 M), phentolamine (10 -5 M), and propranalol (10 -6 M), to eliminate the effect of endogenous prostaglandins and catecholamines. The trachealis smooth muscle activity was recorded through the Isometric Force Displacement Transducer on a Four Channel Oscillograph. A cumulative dose-response relationship was demonstrated by adding successive doses of bradykinin on the tracheal strips, starting with 11 μg to 77 μg of 10 -4 concentration. A similar procedure was repeated in the presence of montelukast 0.5 μg/ml, which, was equal to approximate C max achieved in vivo with a 10 mg oral dose of montelukast, and in the presence of 1 μg/ml of montelukast.
Statistical Analysis: Data was expressed as mean ± standard error (SEM), and was analyzed using the SPSS version 15. A P value of less than 0.05 was considered significant.
Results: Bradykinin produced a dose-dependent, reversible contraction of isolated tracheal smooth muscle. Montelukast significantly reduced the bradykinin-induced tracheal smooth muscle reactivity and shifted the bradykinin curve to the right and downwards, in the presence of both concentrations of montelukast. The mean magnitude of response achieved with 77 μg of bradykinin in the absence of montelukast was 39 mm ± 6.26, in the presence of 0.5 μg/ml of montelukast it was 24.17 mm ± 4.11, and in the presence of 1 μg/ml of montelukast it was 13 mm ± 2.6.
Conclusion: It is concluded that montelukast significantly inhibits, in a dose-dependent manner, the bradykinin-induced contraction of the guinea pig tracheal smooth muscle, and alludes to an interaction between the bradykinin and leukotriene mediators.

Keywords
ACE inhibitors, bradykinin, cough, guinea pig trachea, montelukast

 
© Copyright 2011 Indian Journal of Pharmacology.
Alternative site location: http://www.ijp-online.com

Home Faq Resources Email Bioline
© Bioline International, 1989 - 2024, Site last up-dated on 01-Sep-2022.
Site created and maintained by the Reference Center on Environmental Information, CRIA, Brazil
System hosted by the Google Cloud Platform, GCP, Brazil