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A role of hypothalamic orexin-producing neurons:the regulation of adaptive behavior according to energy balance Takeshi Sakurai 1 1Institute of Basic Medical Sciences, University of Tsukuba Keyword: オレキシン , エネルギーバランス , 摂食行動 pp.425-431
Published Date 2003/6/10
DOI https://doi.org/10.11477/mf.1431100325
  • Abstract
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 Mammals respond to declining food availability by becoming more wakeful and active, yet the central neural pathways regulating arousal and instinctual motor programs(such as food seeking)according to homeostatic need are not well understood. We found that hypothalamic neurons containing the orexin neuropeptides monitor indicators of energy balance, and mediate adaptive augmentation of arousal in response to fasting. Activity of isolated orexin neurons is inhibited by glucose and leptin, and stimulated by ghrelin. Transgenic mice, in which orexin neurons are genetically ablated, fail to respond during fasting with increased wakefulness and locomotor activity. These findings indicate that orexin neurons provide a critical link between peripheral energy balance and behavioral arousal triggered by fasting.


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電子版ISSN 1882-1243 印刷版ISSN 0001-8724 医学書院

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