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Publication : Dopamine D1 receptors are not critical for opiate reward but can mediate opiate memory retrieval in a state-dependent manner.

First Author  Ting-A-Kee R Year  2013
Journal  Behav Brain Res Volume  247
Pages  174-177 PubMed ID  23538064
Mgi Jnum  J:197617 Mgi Id  MGI:5494188
Doi  10.1016/j.bbr.2013.03.026 Citation  Ting-A-Kee R, et al. (2013) Dopamine D1 receptors are not critical for opiate reward but can mediate opiate memory retrieval in a state-dependent manner. Behav Brain Res 247:174-7
abstractText  Although D1 receptor knockout mice demonstrate normal morphine place preferences, antagonism of basolateral amygdala (BLA) D1 receptors only during drug-naive rat conditioning has been reported to inhibit the expression of a morphine place preference. One possible explanation for this result is state-dependent learning. That is, the omission of the intra-BLA infusion cue during testing - which acts as a potent discriminative stimulus - may have prevented the recall of a morphine-environment association and therefore, the consequent expression of a morphine place preference. To examine this possibility, we tested whether intra-BLA infusion of the D1-receptor antagonist SCH23390 during both training and testing might reveal a morphine place preference. Our results suggest that in previously drug-naive animals, D1 receptor antagonism during testing restores the opiate conditioned place preference that is normally absent when D1 receptors are blocked only during training, suggesting that BLA D1 receptors can mediate state-dependent memory retrieval.
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