| First Author | Medvedev IO | Year | 2005 |
| Journal | Psychopharmacology (Berl) | Volume | 180 |
| Issue | 3 | Pages | 408-13 |
| PubMed ID | 15719221 | Mgi Jnum | J:114238 |
| Mgi Id | MGI:3688650 | Doi | 10.1007/s00213-005-2173-y |
| Citation | Medvedev IO, et al. (2005) Characterization of conditioned place preference to cocaine in congenic dopamine transporter knockout female mice. Psychopharmacology (Berl) 180(3):408-13 |
| abstractText | RATIONALE: The dopamine transporter (DAT) is thought to play a major role in the rewarding effects of cocaine. Therefore, it is surprising that cocaine reveals conditioned effects in DAT knockout (DAT-KO) mice. OBJECTIVES: To examine these findings further, we obtained complete dose-effect curves for DAT-KO and DAT wild-type (DAT-WT) mice in a cocaine conditioned place preference (CPP) procedure. METHODS: Congenic C57BL6 background female DAT-KO and DAT-WT mice were conditioned in a three-compartment place preference apparatus. Conditioning consisted of three 30-min sessions with cocaine (2.5, 5.0, 10.0, 20.0, or 40.0 mg/kg) and three 30-min sessions with saline. The distribution of time in each choice compartment was determined after each pair of conditioning sessions (one cocaine and one saline session). RESULTS: DAT-WT mice revealed CPP over a wide range of cocaine doses (5.0-40 mg/kg), whereas DAT-KO mice revealed CPP over a more restricted range of doses, with consistent CPP only occurring with 10 mg/kg of cocaine. CONCLUSIONS: CPP for cocaine develops in both DAT-KO and DAT-WT mice; however, the dose range at which CPP develops is much more restricted in DAT-KO mice than in DAT-WT mice. These observations corroborate the significant role of DAT inhibition in cocaine's conditioned effects. |
