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Alcohol potently inhibits the kainate receptor-dependent excitatory drive of hippocampal interneurons. They were filmed performing sex acts on the dance floor. Finally, mice lacking the gene for the synaptic scaffolding protein Homer 2b showed reduced alcohol preference and alcohol-induced CPP, suggesting that Homer 2b protein is involved in the reinforcing effects of alcohol Szumlinski et al. Imagine that the main drag in your town had a furniture store that was full of love seats, side tables, and faux floral displays, but never, ever opened its doors. Studies using patch-clamp and other electrophysiological techniques in brain slices report that alcohol inhibits postsynaptic NMDA- and non-NMDA-mediated glutamate transmission Lovinger et al. In summary, the rewarding effects of drugs of abuse play a crucial role in continued drug use and development of drug addiction. Finally, another non-competitive NMDA antagonist called ketamine, not yet approved by the FDA, has shown promise in the treatment of severely depressed patients for review see Coyle and Laws,

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Glutamatergic transmission in drug reward: implications for drug addiction

Intriguingly, increase in VTA glutamate levels was also observed in cocaine-experienced animal after an intraperitoneal injection of cocaine methiodide, which does not cross the blood brain barrier Wise et al. Metabotropic glutamate 5 receptors regulate sensitivity to ethanol in mice. Behavioural assessment of drug reinforcement and addictive features in rodents: Pharmacological stimulation of group ii metabotropic glutamate receptors reduces cocaine self-administration and cocaine-induced reinstatement of drug seeking in squirrel monkeys. Conditional knockout of NMDA receptors in dopamine neurons prevents nicotine-conditioned place preference. However, the increase in VTA glutamate levels in cocaine-experienced animals was transient and was not seen throughout the cocaine self-administration period. Gender differences in alcohol metabolism have been reported across species, including rats Sutker et al.

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