PMID: 6102425Feb 1, 1980

The adrenoceptor blocking properties of the new beta 2-selective antagonist, IPS 339 on tracheal smooth muscle and on slow contracting skeletal muscle

Acta Pharmacologica Et Toxicologica
E HolmbergB Waldeck

Abstract

The beta-adrenoceptor blocking properties of IPS 339 and propranolol were studied on isolated preparations of trachea and of the slow-contracting soleus muscle from the guinea-pig. Both compounds antagonized the relaxation of the trachea and the depression of subtetanic contractions of the soleus produced by the beta2-selective agonist, terbutaline. On the soleus muscle the pA2-values for IPS 339 and propranolol were similar and close to those obtained for propranolol on the trachea. However, on the trachea the slope of the Schildplot for IPS 339 against terbutaline became less than one and a reliable pA2-value could not be calculated.

Citations

Apr 1, 1976·The Journal of Pharmacy and Pharmacology·W C Bowman, C Raper
Jul 1, 1977·British Journal of Pharmacology·J L ImbsC G Wermuth
Sep 1, 1977·The Journal of Pharmacy and Pharmacology·B Waldeck
Sep 15, 1969·Experientia·J BergmanK Wetterlin
Feb 1, 1980·Acta Pharmacologica Et Toxicologica·E Holmberg, B Waldeck
Mar 1, 1959·British Journal of Pharmacology and Chemotherapy·O ARUNLAKSHANA, H O SCHILD

Related Concepts

IPS 339, monohydrochloride, (+-)-isomer
Cavia
Antagonist Muscle Action
Contraction (Finding)
Trachea
Smooth Muscle
Muscle Relaxation Phase
Soleus Muscle Structure
Terbutalin von ct
Propanolamines

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