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Bradykinin and substance P potentiate acetylcholine-induced bronchospasm in guinea-pig
C Omini1, G Brunelli, A Hernandez
1Institute of Pharmacological Sciences, University of Milan, Italy.
European Journal of Pharmacology
|April 12, 1989
Abstract:
The interaction of threshold doses of bradykinin (BK) and substance P (SP) with acetylcholine (ACh)-induced bronchospasm was investigated in anaesthetized guinea-pigs. The two peptides potentiated the ACh-induced bronchospasm, an effect which did not seem to depend on prostaglandin release. On the other hand, vagotomy abolished the capacity of BK and SP to potentiate the ACh-induced bronchospasm. The present data suggest a possible involvement of BK and SP in the genesis of airway hyperreactivity.