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Orexins (‘hypocretins’) are peptides produced by neurons of the hypothalamus that project to structures implicated in reward and emotion processing. Converging evidence demonstrates functional roles of orexin signaling in arousal, sleep/wakefulness and motivated behaviors for natural and drug rewards. Suvorexant, a dual orexin receptor antagonist, recently received approval from the US Food and Drug...
The hypocretin/orexin (HCRT) system is implicated in reward and reinforcement processes through actions on the mesolimbic dopamine (DA) system. Here we provide evidence for the relationship between HCRT and DA in vivo in anesthetized and freely moving mice. The ability of cocaine to elicit reward‐related behaviors in mice lacking the HCRT prepro‐peptide (HCRT knock‐out; KO) and wild‐type controls...
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