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- W2061748321 abstract "This study was conducted to investigate whether the dose of estradiol (E) administered acutely, or chronic delivery of one dose of E impacts acquisition and subsequent cocaine self-administration in ovariectomized (OVX) female rats. Five groups of female rats were compared: OVX females treated with 0, 1, 2, or 5 microg 17beta-E, 30 min prior to the self-administration session, and OVX rats that received a 1.5mg E pellet (designed to chronically release 25 microg E/day X 60 days) implanted 1 week before cocaine self-administration initiation. Rats were tested in 1h sessions on a FR1 schedule with the dose of cocaine increasing every week (testing occurred 5 day/week; doses: 0.2, 0.3, 0.4, 0.5 and 0.75 mg/(kg infusion)). We report that OVX rats treated with 2 microg E acquired self-administration more rapidly than all of the other groups, and animals that received 1 or 2 microg E self-administered significantly more cocaine compared to OVX+vehicle at 0.3 and 0.4 mg/(kg infusion). In contrast, OVX rats given 5 microg E acutely, or chronic E via slow-release pellets did not take more cocaine than the OVX+vehicle group at any time point. Physiological serum concentrations of E were seen with 1 or 2 microg E, but 5 microg E and the E pellet produced supra-physiological concentrations. These results suggest an inverted U-shaped dose-response curve for the effect of E on acquisition of cocaine self-administration." @default.
- W2061748321 created "2016-06-24" @default.
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- W2061748321 date "2008-04-01" @default.
- W2061748321 modified "2023-10-13" @default.
- W2061748321 title "Acquisition of cocaine self-administration in ovariectomized female rats: Effect of estradiol dose or chronic estradiol administration" @default.
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- W2061748321 doi "https://doi.org/10.1016/j.drugalcdep.2007.10.005" @default.
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