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首页> 外文期刊>Addiction biology >Synergistic effects of MDMA and ethanol on behavior: Possible effects of ethanol on dopamine D-2-receptor-related signaling
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Synergistic effects of MDMA and ethanol on behavior: Possible effects of ethanol on dopamine D-2-receptor-related signaling

机译：MDMA和乙醇对行为的协同作用：乙醇对多巴胺D-2受体相关信号传导的可能影响

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Polydrug abuse is common among drug abusers. In particular, psychostimulants are often taken with ethanol, and the combination of 3,4-methylenedioxymethamphetamine (MDMA) and alcohol is one of the most common forms of polydrug abuse. However, the mechanism by which these drugs influence behavior remains unclear. The present study was designed to delineate the mechanisms that underlie the effects of the interaction between MDMA and ethanol on behavior in rodents. The combination of MDMA with ethanol enhanced their locomotor-increasing, rewarding, and discriminative stimulus effects without enhancing their effects on the release of dopamine from the nucleus accumbens in rodents. In addition, ethanol potently enhanced locomotor activity produced by the dopamine receptor agonist apomorphine in mice. In antagonism tests, the dopamine D-1-receptor antagonist SCH23390, but not the D-2-receptor antagonist haloperidol, completely suppressed hyperlocomotion induced by MDMA. However, hyperlocomotion induced by the co-administration of MDMA and ethanol was potently suppressed by haloperidol. These results suggest that the synergistic effects of MDMA and ethanol are mediated through dopamine transmission, especially through postsynaptical regulation of D-2-receptor-mediated functions.
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