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- W2090557461 abstract "The current experiment investigated the effect of 3,4-methylenedioxymethamphetamine (MDMA; 'Ecstasy') preexposure on the acquisition of intravenous amphetamine self-administration and the reinstatement of amphetamine-seeking behavior by either MDMA or amphetamine. Rats were preexposed to a 5-HT depleting regime of MDMA (5 mg/kg every hour for 4 h on two consecutive days) or equivalent vehicle injections. Intravenous self-administration of low dose d-amphetamine (0.03 mg/kg/infusion) on a FR1 schedule was subsequently assessed. The rats were then given 2 weeks of extinction and tested for drug-seeking behavior with priming doses of amphetamine or MDMA. Brains were analysed for monoamine content using high-performance liquid chromatography (HPLC). MDMA-preexposed rats were initially slower to acquire amphetamine self-administration. However, by day 6 of acquisition, there was no difference from controls. Following extinction, amphetamine (1 mg/kg, i.p.) reinstated drug seeking and produced locomotor hyperactivity in both MDMA- and vehicle-pretreated animals. However, MDMA (5 mg/kg, i.p.) was only effective in producing amphetamine seeking and hyperactivity in MDMA-pretreated rats. MDMA pretreatment caused significant decreases in 5-hydroxy-indolacetic acid (5-HIAA) and 5-HT in several brain regions. These results suggest that 5-HT depletion induced by MDMA may initially slow the acquisition of amphetamine self-administration but that MDMA preexposure may also sensitize animals to the locomotor stimulating and priming effects of MDMA on drug-seeking behavior." @default.
- W2090557461 created "2016-06-24" @default.
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- W2090557461 date "2004-10-01" @default.
- W2090557461 modified "2023-10-13" @default.
- W2090557461 title "Preexposure to MDMA (“Ecstasy”) delays acquisition but facilitates MDMA-induced reinstatement of amphetamine self-administration behavior in rats" @default.
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- W2090557461 doi "https://doi.org/10.1016/j.pbb.2004.08.004" @default.
- W2090557461 hasPubMedId "https://pubmed.ncbi.nlm.nih.gov/15501310" @default.
- W2090557461 hasPublicationYear "2004" @default.
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