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- W2161294654 abstract "3,4-(±)-Methylenedioxymethamphetamine (MDMA) is a ring-substituted amphetamine derivative with potent psychostimulant properties. The neuropharmacological effects of MDMA are biphasic in nature, initially causing synaptic monoamine release, primarily of serotonin (5-HT), inducing thermogenesis and hyperactivity (5-HT syndrome). The long-term effects of MDMA manifest as a prolonged depletion in 5-HT, and structural damage to 5-HT nerve terminals. MDMA toxicity is in part mediated by an ability to inhibit the presynaptic 5-HT reuptake transporter (SERT). Using a SERT-knockout (SERT-KO) rat model, we determined the impact of SERT deficiency on thermoregulation, locomotor activity, and neurotoxicity in SERT-KO or Wistar-based wild-type (WT) rats exposed to MDMA. WT and SERT-KO animals exhibited the highest thermogenic responses to MDMA (four times 10 mg/kg, sc at 12 h intervals) during the diurnal (first and third) doses according to peak body temperature and area under the curve (∑°C × h) analysis. Although no differences in peak body temperature were observed between MDMA-treated WT and SERT-KO animals, ∑°C × h following the first MDMA dose was reduced in SERT-KO rats. Exposure to a single dose of MDMA stimulated horizontal velocity in both WT and SERT-KO rats, however, this effect was delayed and attenuated in the KO animals. Finally, SERT-KO rats were insensitive to MDMA-induced long-term (7 days) depletions in 5-HT and its metabolite, 5-hydroxyindole acetic acid, in both cortex and striatum. In conclusion, SERT deficiency modulated MDMA-mediated thermogenesis, hyperactivity and neurotoxicity in KO rats. The data confirm that the SERT is essential for the manifestation of the acute and long-term toxicities of MDMA." @default.
- W2161294654 created "2016-06-24" @default.
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- W2161294654 date "2014-03-04" @default.
- W2161294654 modified "2023-09-27" @default.
- W2161294654 title "Serotonin Reuptake Transporter Deficiency Modulates the Acute Thermoregulatory and Locomotor Activity Response to 3,4-(±)-Methylenedioxymethamphetamine, and Attenuates Depletions in Serotonin Levels in SERT-KO Rats" @default.
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- W2161294654 doi "https://doi.org/10.1093/toxsci/kfu039" @default.
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