期刊
FRONTIERS IN NEUROSCIENCE
卷 7, 期 -, 页码 -出版社
FRONTIERS MEDIA SA
DOI: 10.3389/fnins.2013.00256
关键词
hypocretinergic system; endocannabinoid system; heteromerization; reward; energy balance; antinociception; sleep/wake cycle
资金
- Instituto de Salud Carlos III (RTA-RETICS) [PI07/0559, PI10/00316, RD06/001/001]
- Spanish Ministry of Science and Technology, Consolider-C [SAF2007-64062, SAF2011-29864]
- Catalan Government [SGR2009-00731]
- Catalan Institution for Research and Advanced Studies (ICREA Academia program)
- Spanish Ministry of Education
Emerging findings suggest the existence of a cross-talk between hypocretinergic and endocannabinoid systems. Although few studies have examined this relationship, the apparent overlap observed in the neuroanatomical distribution of both systems as well as their putative functions strongly point to the existence of such cross-modulation. In agreement, biochemical and functional studies have revealed the existence of heterodimers between CB1 cannabinoid receptor and hypocretin receptor-1, which modulates the cellular localization and downstream signaling of both receptors. Moreover, the activation of hypocretin receptor-1 stimulates the synthesis of 2-arachidonoyl glycerol culminating in the retrograde inhibition of neighboring cells and suggesting that endocannabinoids could contribute to some hypocretin effects. Pharmacological data indicate that endocannabinoids and hypocretins might have common physiological functions in the regulation of appetite, reward and analgesia. In contrast, these neuromodulatory systems seem to play antagonistic roles in the regulation of sleep/wake cycle and anxiety-like responses. The present review attempts to piece together what is known about this interesting interaction and describes its potential therapeutic implications.
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