Tosyl arginine methyl ester induces bronchoconstriction in rabbit bronchial tissues in vitro: a possible new mediator in asthma
Subratty, A.H.; Kok-Shun, L.H.; Yan, M.Y.; Fakim, N.
Annals of Allergy 73(3): 269-270
1994
ISSN/ISBN: 0003-4738 PMID: 8092563 Document Number: 430049
Tosyl arginine methyl ester induced bronchoconstriction in rabbit bronchial rings mounted in vitro with a calculated EC50 of 5.6 x 10(-5) M as compared with acetylcholine which induced sustainable constriction with an EC50 of 2.5 x 10(-6) M. Tosyl arginine methyl ester, however, had definite bronchoconstricting properties though less potent than acetylcholine. We concluded that our data support the hypothesis that tosyl arginine methyl ester could be a possible biochemical mediator of airway contraction.