the contractile response to bradykinin was unaffected by atropine , diphenhydramine , fpl-55712 , methysergide , prazosin or tetrodotoxin , indicating that the contraction was not mediated via the release of ach , histamine , peptide leukotrienes , serotonin or catecholamine .
C0026820
contractile
C0006100
bradykinin