Naunyn-Schmiedeberg's archives of pharmacology. 284(3)
ISSN:
0028-1298
Popis:
The structure-activity relationship of gastrin- and cholecystokinin like polypeptides has been studied on intestinal smooth muscle of the guinea pig. The polypeptides studied here elicited reciprocal responses of the two muscle layers of ileum similar to the responses to electrical stimulation. The contraction of the longitudinal muscle and the relaxation of the circular muscle layer in response to peptides was followed by a contraction of circular muscle and a relaxation of longitudinal muscle.