Behavioural analysis of melanin-concentrating hormone in rats: evidence for orexigenic and anxiolytic properties

被引:48
作者
Kela, J
Salmi, P
Rimondini-Giorgini, R
Heilig, M
Wahlestedt, C
机构
[1] Karolinska Inst, Ctr Genom & Bioinformat, SE-17177 Stockholm, Sweden
[2] Huddinge Univ Hosp, Dept NEUROTEC, Karolinska Inst, SE-14186 Stockholm, Sweden
关键词
food intake; anxiety; body temperature; thermoregulation; locomotor activity; exploratory behaviour;
D O I
10.1016/S0167-0115(03)00114-9
中图分类号
R5 [内科学];
学科分类号
1002 ; 100201 ;
摘要
Melanin-concentrating hormone (MCH) is a cyclic neuropeptide, predominantly expressed in hypothalamus, and recognized as a key regulator in feeding behaviour and energy balance. In this study, we examined the behavioural effects of intracerebroventricularly administered MCH on food intake, anxiety, exploratory behaviour and body core temperature in rats. MCH (0.15-10.0 mug, i.c.v.) acutely increased food intake in a dose-dependent manner. In addition, MCH (0.6-10.0 mug, i.c.v.) produced effects similar to anxiolytics in an animal model of anxiety, Vogel's punished drinking test. Thus, punished drinking episodes were significantly increased. We found no effects of MCH (5.0-20.0 mug, i.c.v.) on locomotor activity either in habituated or non-habituated animals. Furthermore, MCH did not produce any changes in body core temperature. Together, these observations further support a role for MCH as an orexigenic neuropeptide and also suggest anti-anxiety proper-ties for MCH. (C) 2003 Elsevier Science B.V. All rights reserved.
引用
收藏
页码:109 / 114
页数:6
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