The Inhibitory Effect of Secretin and Glucagon on Pressure Responses to Cholecystokinin-Pancreozymin in Isolated Guinea-pig Stomach

Abstract

Pressure responses in guinea-pig antral and fundal pouches were investigated in vitro. Secretin and glucagon in concentrations that did not significantly alter spontaneous activity significantly reduced antral responses to cholecystokinin, but had no depressive effect on the fundal responses. The antral inhibition of CCK-PZ may be specific, since responses to acetylcholine were unaffected by secretin and glucagon. The changes produced by secretin and glucagon in the antral dose-response curve to CCK-PZ suggest that the inhibition might be of a non-competitive type.

Key-words:

• Animal experimentation
• cholecystokinin-pancreozymin
• glucagon
• hormones
• secretin
• stomach