Intracerebroventricular administration of the growth hormone-releasing peptide KP-102 increases food intake in free-feeding rats.

Abstract:

:Recent evidence suggests that growth hormone-releasing peptides (GHRPs) mimic an unidentified native GH-releasing hormone (GHRH)-amplifying hormone. GHRH has been shown to stimulate food intake acting on the central nervous system. The present studies were conducted to test the hypothesis that GHRPs may also potentiate the central effect of GHRH on feeding in free-feeding rats. Intracerebroventricular (ICV) administration of picomole doses of a newly developed GHRP, KP-102, or human GHRH stimulated feeding, but the phenomenon was not reproduced by systemic injection. A prior ICV injection of a GHRH antagonist completely prevented the increase of food intake evoked by GHRH, but this pretreatment did not influence the increase in food intake induced by KP-102. When maximally effective doses of GHRH and KP-102 were co-administered ICV, the amount of food intake increased significantly compared with after ICV injection of a maximum dose of either peptide alone. These findings suggest that GHRPs stimulate food intake via a specific receptor for GHRPs in the central nervous system and amplify the central effect of GHRH on feeding.

journal_name

Endocrinology

journal_title

Endocrinology

authors

Okada K,Ishii S,Minami S,Sugihara H,Shibasaki T,Wakabayashi I

doi

10.1210/endo.137.11.8895390

subject

Has Abstract

pub_date

1996-11-01 00:00:00

pages

5155-8

issue

11

eissn

0013-7227

issn

1945-7170

journal_volume

137

pub_type

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