Dose-dependent cocaine place conditioning and D1 dopamine antagonist effects in male Japanese quail.
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Abstract |
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The dopamine D1 receptor subtype has been implicated in drug reward processes in mammals. Two experiments investigated whether dose-dependent differences in cocaine conditioned place preference (CPP) would be obtained in an avian species and whether these cocaine effects were mediated by the dopamine D1 antagonist R(+/-)-SCH23390. In Experiment 1, male birds were given intraperitoneal injections of 1, 3, 10, or 30 mg/kg of cocaine hydrochloride, paired with a chamber that contained distinct visual cues. On alternate days, they received saline paired with a chamber containing different visual cues. A CPP test was given after four pairings of cocaine with the distinct chamber. In Experiment 2, 0.0025, 0.025, or 0.25 mg/kg of SCH 23390 or saline was administered 15 min prior to cocaine (3 mg/kg) and placement into the least preferred chamber. CPP was observed at 1, 3, and 10 mg/kg doses of cocaine but not at 30 mg/kg or saline. All doses of SCH 23390 attenuated cocaine-induced CPP. The findings suggest that cocaine administration results in a dose-dependent CPP, and that similar with mammals, it may be mediated by D1 receptors in an avian species. Thus, the avian species may be a beneficial comparative model for drug studies, especially those involving visual cue mechanisms of drug reward. |
Year of Publication |
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2004
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Journal |
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Physiology & behavior
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Volume |
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82
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Issue |
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2-3
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Number of Pages |
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309-15
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Date Published |
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2004
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ISSN Number |
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0031-9384
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URL |
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https://linkinghub.elsevier.com/retrieve/pii/S0031938404002124
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DOI |
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10.1016/j.physbeh.2004.03.035
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Short Title |
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Physiol Behav
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