Endothelium-dependent relaxation to the B1 kinin receptor agonist des-Arg9-bradykinin in human coronary arteries.

Br J Pharmacol

Department of Pharmacology, University of Melbourne, Parkville, Victoria, Australia.

Published: December 1995

Des-Arg9-bradykinin (des-Arg9-BK) caused endothelium-dependent relaxations in human, isolated coronary arteries which upregulated with in vitro incubation time. Relaxations to des-Arg9-BK were inhibited by the B1 receptor antagonist, des-Arg9-[Leu3]-BK (pK(B), 6.14 +/- 0.11) but were unaffected by the B2 receptor antagonist, Hoe-140. Therefore, this is the first demonstration that human coronary arteries possess endothelial B1 receptors which mediate endothelium-dependent relaxation and appear to be synthesized de novo during the incubation period.

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http://www.ncbi.nlm.nih.gov/pmc/articles/PMC1909186PMC
http://dx.doi.org/10.1111/j.1476-5381.1995.tb15108.xDOI Listing

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