Comparative action of new highly potent bradykinin receptor antagonists in the guinea-pig trachea
- PMID: 8223898
- DOI: 10.1016/0014-2999(93)91000-d
Comparative action of new highly potent bradykinin receptor antagonists in the guinea-pig trachea
Abstract
We investigated the effect of two new bradykinin receptor antagonists, D-Arg0[Hyp3,D-HypE(trans-propyl)7,Oic8]bradykinin (NPC 17731) and D-Arg0[Hyp3,D-HypE(trans-thiophenyl)7,Oic8]bradykinin (NPC 17761) on [3H]bradykinin binding and on bradykinin-induced contraction of the guinea-pig trachea. Both of these compounds inhibited [3H]bradykinin binding with an affinity similar to that of unlabelled bradykinin. NPC 17731 inhibited bradykinin-induced contraction in a non-competitive manner, whereas NPC 17761 showed competitive antagonism. Therefore, NPC 17761 could contribute to the investigation of the bradykinin receptors in guinea-pig airways.
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