| Literature DB >> 12239605 |
Akihiro Asakawa1, Akio Inui, Kyoko Goto, Hideki Yuzuriha, Yoshiyuki Takimoto, Toshio Inui, Goro Katsuura, Masayuki A Fujino, Michael M Meguid, Masato Kasuga.
Abstract
Neuropeptides in the hypothalamus play a pivotal role in the regulation of energy balance. Agouti-related protein (AGRP), orexin and melanin-concentrating hormone (MCH) have been identified in the hypothalamus as orexigenic peptides. This study was undertaken to investigate the effects of AGRP, orexin and MCH on oxygen consumption. Oxygen consumption was determined by an O2/CO2 metabolism measuring system at 22 degrees C. Mice were kept unrestrained in the chamber without food or water during the light cycle, and the oxygen consumption was measured for 2 h after intra-cerebroventricular (ICV) administration. ICV administered AGRP (1 nmol/mouse) significantly decreased oxygen consumption compared to ACSF-treated controls. Orexin (1 nmol/mouse) significantly increased oxygen consumption, while MCH (1 nmol/mouse) had no significant effect compared to ACSF-treated controls. These results suggest that AGRP, orexin and MCH might have different effects on energy expenditure, thereby regulating appetite and body weight.Entities:
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Year: 2002 PMID： 12239605
Source DB: PubMed Journal: Int J Mol Med ISSN： 1107-3756 Impact factor: 4.101