J Pharm Pharmacol. 1990 Jun;42(6):444-6.

Relaxant and beta 2-adrenoceptor blocking activities of (+/- )-, (+)- and (-)-pindolol on the rat isolated aorta.

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Department of Pharmacology, School of Medicine, University of Auckland, New Zealand.

Abstract

The KCl contracted rat aorta is relaxed by procaterol, (+/- )-, (+)- and (-)-pindolol. The relaxations to procaterol, but not to (+/- )-pindolol, were prevented by ICI 118,551 at 10(-6) M. The relaxations to (+/- )-pindolol are, therefore, not due to beta-adrenoceptor agonism. At 10(-7) M ICI 118,551, (+/- )-, (+)- and (-)-pindolol were beta 2-adrenoceptor antagonists as they inhibited the relaxant responses of the aorta to procaterol.

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