Add time:08/19/2019         Source:sciencedirect.com

The effects on ingestive behavior of the naturally occurring bombesin-like peptides ranatensin and litorin were studied in comparison to those of bombesin by intracerebroventricular pulse injection or by continuous infusion in the rat. Ranatensin and litorin, like bombesin, proved to inhibit drinking and feeding behavior. Marked differences, however, were observed in their effects. In particular our results indicate that these peptides possess different selectivity of action on drinking elicited by different dipsogenic stimuli and different potency and effectiveness in inhibiting food intake induced by food deprivation. Moreover, the effects of the three peptides were markedly affected also by the modality of administration (pulse injection or continuous infusion). On the basis of these results it seems possible to hypothesize that the endogenous bombesin-like peptides may differently affect rat ingestive behavior according to their structure and to the rate and modality of their release in the brain.

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