Abstract
The effects of intracerebroventricular (ICV) and intravenous injections of bombesin (BBS) on food intake were investigated in turkeys. Adult turkey hens were injected ICV with 50 to 1000 ng of BBS. In addition, the effect of pretreatment with the BBS antagonist [d-Arg 1, D-Phe 5, D-Trp 7,9, Leu 11]-substance P was investigated. To determine if BBS also had a peripheral site of action, 0.5 to 8 μg/kg body weight of BBS was injected IV into turkey poults. The ICV and IV injections of BBS decreased food and water intake in a dose-dependent manner. The most efficacious doses when injected ICV for decreasing food and water intake were 1000 and 500 ng, respectively, whereas 8 μg/kg was most efficacious in decreasing food intake when administered IV. The satiating effect of ICV-injected BBS could be attenuated with pretreatment with the BBS antagonist. The results of these studies suggest that BBS acts to decrease food and water intake in both the periphery and the central nervous systems of turkeys.
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