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Intracerebroventricular administration of chicken glucagon‐like peptide‐2 potently suppresses food intake in chicks
Author(s) -
Honda Kazuhisa,
Saneyasu Takaoki,
Shimatani Tomohiko,
Aoki Koji,
Yamaguchi Takuya,
Nakanishi Kiwako,
Kamisoyama Hiroshi
Publication year - 2015
Publication title -
animal science journal
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.606
H-Index - 38
eISSN - 1740-0929
pISSN - 1344-3941
DOI - 10.1111/asj.12282
Subject(s) - medicine , proglucagon , endocrinology , glucagon like peptide 1 , broiler , glucagon , food intake , corticosterone , receptor , chemistry , antagonist , glucagon like peptide 2 , peptide , biology , hormone , biochemistry , food science , type 2 diabetes , diabetes mellitus
Glucagon‐related peptides, such as glucagon‐like peptide ( GLP )‐1, GLP ‐2 and oxyntomodulin ( OXM ), are processed from an identical precursor proglucagon. In mammals, all of these peptides are suggested to be involved in the central regulation of food intake. We previously showed that intracerebroventricular administration of chicken OXM and GLP ‐1 significantly suppressed food intake in chicks. Here, we show that central administration of chicken GLP ‐2 potently suppresses food intake in chicks. Male 8‐day‐old chicks ( G allus gallus domesticus ) were used in all experiments. Intracerebroventricular administration of chicken GLP ‐2 significantly suppressed food intake in chicks. Plasma glucose concentration was significantly decreased by chicken GLP ‐2, whereas plasma nonesterified fatty acid concentration was significantly increased. Intracerebroventricular administration of chicken GLP ‐2 did not affect plasma corticosterone concentration. In addition, the anorexigenic effect of GLP ‐2 was not reversed by the corticotropin‐releasing factor ( CRF ) receptor antagonist α‐helical CRF , suggesting that CRF is not a downstream mediator of the anorexigenic pathway of GLP ‐2 in chicks. Intracerebroventricular administration of an equimolar amount of GLP ‐1 and GLP ‐2, but not OXM , significantly suppressed food intake in both broiler and layer chicks. All our findings suggest that GLP ‐2 functions as a potent anorexigenic peptide in the brain, as well as GLP ‐1, in chicks.

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