SATIETY EFFECTS OF A PHYSIOLOGICAL DOSE OF CHOLECYSTOKININ IN HUMANS

Cholecystokinin 33 (CCK) was infused intravenously to eight healthy ob ese women and 10 healthy lean women of the same age, in doses that eli cited plasma cholecystokinin concentrations in the physiological range . The effect of these infusions after a standardised banana ''shake'' (preload) on food intake and satiety signals was compared with the eff ect of saline infusions in the same subjects. For the whole group food intake (mean (SEM)) (282 (29 g)) was significantly less during CCK th an during saline (346 (31) g, p<0.05). Hunger feelings tended to be le ss during CCK infusions. Examination of the separate subgroups showed no differences between lean and obese subjects in the satiety effects of CCK. In conclusion, under the conditions of this study, CCK signifi cantly decreases food intake in humans, and this effect is similar for lean and obese subjects.