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• W2060895955 endingPage "562" @default.
• W2060895955 startingPage "562" @default.
• W2060895955 abstract "Both hallucinogens and 3,4-methylenedioxymethamphetamine (MDMA or ecstasy) have direct agonistic effects on postsynaptic serotonin(2A) receptors, the key site for hallucinogenic actions. In addition, MDMA is a potent releaser and reuptake inhibitor of presynaptic serotonin.To assess the differential effects of MDMA and hallucinogen use on cerebral serotonin transporter (SERT) and serotonin(2A) receptor binding.A positron emission tomography study of 24 young adult drug users and 21 nonusing control participants performed with carbon 11 ((11)C)-labeled 3-amino-4-[2-[(di(methyl)amino)methyl]phenyl]sulfanylbenzonitrile (DASB) and fluorine 18 ((18)F)-labeled altanserin, respectively. Scans were performed in the user group after a minimum drug abstinence period of 11 days, and the group was subdivided into hallucinogen-preferring users (n = 10) and MDMA-preferring users (n = 14).Twenty-four young adult users of MDMA and/or hallucinogenic drugs and 21 nonusing controls.In vivo cerebral SERT and serotonin(2A) receptor binding.Compared with nonusers, MDMA-preferring users showed significant decreases in SERT nondisplaceable binding potential (neocortex, -56%; pallidostriatum, -19%; and amygdala, -32%); no significant changes were seen in hallucinogen-preferring users. Both cortical and pallidostriatal SERT nondisplaceable binding potential was negatively correlated with the number of lifetime MDMA exposures, and the time of abstinence from MDMA was positively correlated with subcortical, but not cortical, SERT binding. A small decrease in neocortical serotonin(2A) receptor binding in the serotonin(2A) receptor agonist users (both user groups) was also detected.We found evidence that MDMA but not hallucinogen use is associated with changes in the cerebral presynaptic serotonergic transmitter system. Because hallucinogenic drugs primarily have serotonin(2A) receptor agonistic actions, we conclude that the negative association between MDMA use and cerebral SERT binding is mediated through a direct presynaptic MDMA effect rather than by the serotonin(2A) agonistic effects of MDMA. Our cross-sectional data suggest that subcortical, but not cortical, recovery of SERT binding might take place after several months of MDMA abstinence." @default.
• W2060895955 created "2016-06-24" @default.
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• W2060895955 date "2011-06-06" @default.
• W2060895955 modified "2023-10-05" @default.
• W2060895955 title "In Vivo Imaging of Cerebral Serotonin Transporter and Serotonin2A Receptor Binding in 3,4-Methylenedioxymethamphetamine (MDMA or “Ecstasy”) and Hallucinogen Users" @default.
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