Abstract
The effects of fasting, restraint stress, and intracerebroventricular (i.c.v.) injection of somatostatin on the growth hormone secretagogue, KP-102-induced stimulation of food intake were examined in rats. KP-102-induced stimulation of food intake was observed in freely-fed rats but not in 24-h starved rats. A 90 min period of restraint stress decreased food intake, and i.c.v. administration of KP-102 counteracted the suppressive effect of restraint on food intake. ICV administration of somatostatin partially administered the KP-102-induced stimulation of food intake in freely-fed rats, while somatostatin itself did not change food intake. These results suggest that the stimulatory effect of KP-102 on feeding behavior is evident in freely-fed rats but not in starved rats, and that the effect of KP-102 is counteracted or attenuated by stress or somatostatin.
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