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Hoffmann, R. A wiki for the life sciences where authorship matters. Nature Genetics (2008)
 

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Evidence for involvement of both D1 and D2 receptors in maintaining cocaine self-administration.

Rats trained to self-administer cocaine (0.75 mg/kg/infusion) on an FR-5 schedule were treated with selective D1 or D2 antagonists. A69045, a D1 antagonist with no appreciable affinity for 5-HT receptors increased cocaine self-administration to 147, 172 and 167% of baseline at doses of 2.5, 5.0 or 10.0 mumol/kg, SC respectively. SCH-23390 (0.007, 0.015 and 0.030 mumol/kg, SC) increased self-administration to 116, 147 and 165% of baseline, respectively. Both D1 antagonists decreased responding in some animals at the highest dose tested. The D2 antagonist YM-09151-2 showed a similar profile, increasing cocaine self-administration at 0.01 and 0.016 mumol/kg, SC and suppressing responding by most animals at the dose of 0.03 mumol/kg, SC. These data give further support to the hypothesis that both D1 and D2 receptors are involved in maintaining cocaine self-administration.[1]

References

  1. Evidence for involvement of both D1 and D2 receptors in maintaining cocaine self-administration. Britton, D.R., Curzon, P., Mackenzie, R.G., Kebabian, J.W., Williams, J.E., Kerkman, D. Pharmacol. Biochem. Behav. (1991) [Pubmed]
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