Orexin and natural reward: feeding, maternal, and male sexual behavior.
Orexin, also known as hypocretin, is a hypothalamic neuropeptide important for mediation of arousal and sleep as well as feeding and energy homeostasis. Recent studies have indicated that orexin also plays a key role regulating motivation and reward associated with food intake and with drugs of abuse. Based on those findings, it has been hypothesized that orexin is involved in control of other natural reward behaviors. This review will summarize studies that examine the role of orexin in motivation and reward associated with food intake, maternal behavior, and male sexual behavior. In particular for sexual behavior in male rats, we have recently shown that orexin cell-specific lesions do not impair sexual performance and motivation but disrupt conditioned responses associated with sexual reward.
Department of Molecular and Integrative Physiology, University of Michigan, Ann Arbor, Michigan, USA.
Andrea R
AR
Di Sebastiano
Lique M
LM
Coolen
D000818:Animals; D005247:Feeding Behavior / Q000502:physiology*; D005260:Female; D006801:Humans; D047908:Intracellular Signaling Peptides and Proteins / Q000502:physiology*; D008297:Male; D008425:Maternal Behavior / Q000502:physiology*; D009042:Motivation / Q000502:physiology; D009479:Neuropeptides / Q000502:physiology*; D000068797:Orexins; D012201:Reward; D012725:Sexual Behavior / Q000502:physiology*
D047908:Intracellular Signaling Peptides and Proteins; D009479:Neuropeptides; D000068797:Orexins