Journal
CURRENT OPINION IN PHARMACOLOGY
Volume 9, Issue 1, Pages 39-45Publisher
ELSEVIER SCI LTD
DOI: 10.1016/j.coph.2008.12.018
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Funding
- National Science Foundation
- National Institutes of Health
- National Institute on Drug Abuse, DARPA and NARSAD
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The hypocretins (abbreviated 'Hcrts' - also called 'orexins') are two neuropeptides secreted exclusively by a small population of neurons in the lateral hypothalamus. These peptides bind to two receptors located throughout the brain in nuclei associated with diverse cognitive and physiological functions. Initially, the brain Hcrt system was found to have a major role in the regulation of sleep/wake transitions. More recent studies indicate Hcrts may play a role in other physiological functions, including food intake, addiction, and stress. Taken together, these studies suggest a general role for Hcrts in mediating arousal, especially when an organism must respond to unexpected stressors and challenges in the environment.
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