Title : Direct involvement of orexinergic systems in the activation of the mesolimbic dopamine pathway and related behaviors induced by morphine.

Pub. Date : 2006 Jan 11

PMID : 16407535






4 Functional Relationships(s)
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1 The levels of dopamine and its major metabolites in the nucleus accumbens were markedly increased by the microinjection of orexin A and orexin B into the VTA. Dopamine hypocretin Mus musculus
2 The levels of dopamine and its major metabolites in the nucleus accumbens were markedly increased by the microinjection of orexin A and orexin B into the VTA. Dopamine hypocretin Mus musculus
3 Furthermore, the increased level of dialysate dopamine produced by morphine in the mouse brain was significantly decreased by deletion of the prepro-orexin gene. Dopamine hypocretin Mus musculus
4 These findings provide new evidence that orexin-containing neurons in the VTA are directly implicated in the rewarding effect and hyperlocomotion induced by morphine through activation of the mesolimbic dopamine pathway in rodents. Dopamine hypocretin Mus musculus