The pharmacology of T-kinin and des-Arg(11)-T-kinin in primary cultures of rat bladder smooth muscle cells.

Abstract:

:T-kinin and its putative carboxypeptidase product des-Arg(11)-T-kinin are members of the kinin family that are unique to the rat. Primary cultures of rat bladder smooth muscle cells were used to investigate the pharmacology of these peptides. Calcium imaging experiments showed that rat bladder smooth muscle cells responded to both bradykinin and des-Arg(9)-bradykinin with an increase in [Ca(2+)](i) and responses to both agonists could be observed in the same cell. A more detailed pharmacological characterisation with a range of bradykinin receptor agonists and antagonists using 45Ca(2+) efflux confirmed the presence of both B(1) and B(2) bradykinin receptors. Using this cellular model, we confirm that T-kinin is a bradykinin B(2) receptor agonist and show for the first time that des-Arg(11)-T-kinin is a potent and selective bradykinin B(1) receptor agonist. In addition, using cells expressing the cloned rat and human bradykinin B(2) receptors plus the Ca(2+)-sensitive protein aequorin, T-kinin was shown to be selective for the rat over the human bradykinin B(2) receptor.

journal_name

Eur J Pharmacol

authors

Davis C,Burgess G

doi

10.1016/s0014-2999(02)02102-7

keywords:

subject

Has Abstract

pub_date

2002-08-23 00:00:00

pages

123-30

issue

2

eissn

0014-2999

issn

1879-0712

pii

S0014299902021027

journal_volume

450

pub_type

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