Oxytocin inhibits ethanol consumption and ethanol-induced dopamine release in the nucleus accumbens

Addiction Biology
Sebastian T PetersInga D Neumann

Abstract

Alcohol (EtOH) is one of the most widely abused recreational drugs and is arguably the most harmful. However, current treatment options for alcohol-use disorders generally have limited efficacy and poor uptake in the community. In this context, the neuropeptide oxytocin (OXT) has emerged as a promising potential treatment option for a number of substance-use disorders, including alcoholism. The utility of OXT in reducing consumption of and craving for a wide range of substances may lie in its ability to modulate drug-induced neurochemical effects within the mesolimbic dopamine pathway. However, the impact of OXT on EtOH actions in this pathway has yet to be explored. Here, we reveal that an acute intracerebroventricular (icv) infusion of OXT (1 µg/5 µl) attenuated voluntary EtOH (20 percent) self-administration after chronic intermittent access to EtOH for 59 days (28 drinking sessions) in male Wistar rats. Next, we demonstrated that an acute intraperitoneal (ip) injection of EtOH (1.5 g/kg, 15 percent w/v) increased dopamine release within the nucleus accumbens in both EtOH-naive rats and rats that had received 10 daily ip injections of EtOH. Icv OXT completely blocked the EtOH-induced dopamine release in both EtOH-naive and c...Continue Reading

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