Effects of MDMA and related analogs on plasma 5-HT: relevance to 5-HT transporters in blood and brain
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- dc.contributor.author Yubero Lahoz, Samanta, 1985-
- dc.contributor.author Ayestas, Mario A.
- dc.contributor.author Blough, Bruce E.
- dc.contributor.author Partilla, John S.
- dc.contributor.author Rothman, Richard B.
- dc.contributor.author Torre Fornell, Rafael de la
- dc.contributor.author Baumann, Michael H.
- dc.date.accessioned 2019-02-11T08:44:27Z
- dc.date.available 2019-02-11T08:44:27Z
- dc.date.issued 2012
- dc.description.abstract (±)-3,4-Methylenedioxymethamphetamine (MDMA) is an illicit drug that evokes transporter-mediated release of serotonin (5-HT) in the brain. 5-HT transporter (SERT) proteins are also expressed in non-neural tissues (e.g., blood), and evidence suggests that MDMA targets platelet SERT to increase plasma 5-HT. Here we tested two hypotheses related to the effects of MDMA on circulating 5-HT. First, to determine if MDMA metabolites might contribute to actions of the drug in vivo, we used in vitro microdialysis in rat blood specimens to examine the effects of MDMA and its metabolites on plasma 5-HT. Second, to determine whether effects of MDMA on plasma 5-HT might be used as an index of central SERT activity, we carried out in vivo microdialysis in blood and brain after intravenous MDMA administration. The in vitro results show that test drugs evoke dose-related increases in plasma 5-HT ranging from two- to sevenfold above baseline, with MDMA and its metabolite, (±)-3,4-methylenedioxyamphetamine (MDA), producing the largest effects. The ability of MDMA and related analogs to elevate plasma 5-HT is correlated with their potency as SERT substrates in rat brain synaptosomes. The in vivo results reveal that MDMA causes concurrent increases in extracellular 5-HT in blood and brain, but there are substantial individual differences in responsiveness to the drug. Collectively, our findings indicate that MDMA and its metabolites increase plasma 5-HT by a SERT-dependent mechanism, and suggest the possibility that measures of evoked 5-HT release in blood may reflect central SERT activity.
- dc.format.mimetype application/pdf
- dc.identifier.citation Yubero-Lahoz S, Ayestas MA Jr, Blough BE, Partilla JS, Rothman RB, de la Torre R, Baumann MH. Effects of MDMA and related analogs on plasma 5-HT: relevance to 5-HT transporters in blood and brain. Eur J Pharmacol. 2012; 674(2-3):337-44. DOI 10.1016/j.ejphar.2011.10.033
- dc.identifier.doi http://dx.doi.org/10.1016/j.ejphar.2011.10.033
- dc.identifier.issn 0014-2999
- dc.identifier.uri http://hdl.handle.net/10230/36542
- dc.language.iso eng
- dc.publisher Elsevier
- dc.relation.ispartof Eur J Pharmacol. 2012; 674(2-3):337-44
- dc.rights © Elsevier http://dx.doi.org/10.1016/j.ejphar.2011.10.033
- dc.rights.accessRights info:eu-repo/semantics/openAccess
- dc.subject.keyword Blood
- dc.subject.keyword Brain
- dc.subject.keyword MDMA
- dc.subject.keyword Microdialysis
- dc.subject.keyword Platelet
- dc.subject.keyword 5-HT (serotonin)
- dc.subject.keyword SERT (serotonin transporter)
- dc.title Effects of MDMA and related analogs on plasma 5-HT: relevance to 5-HT transporters in blood and brain
- dc.type info:eu-repo/semantics/article
- dc.type.version info:eu-repo/semantics/acceptedVersion