Abstract
The isolation of ghrelin unveiled a new system implicated in food intake regulation. The recently isolated hormone obestatin derives from the same precursor of ghrelin and seems to perform opposite actions. It could be part of a dual system connecting gut and brain to regulate energy homeostasis. The ability of intracerebroventricular administration of obestatin to modify food intake was evaluated. Obestatin had no effect on spontaneous food intake in both ad libitum and food restricted rats. The obestatin injection was not able to antagonize the ghrelin-stimulated increase in food intake either. In conclusion, the present work does not support a role for obestatin on the regulation of food intake in any model studied.
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