PMID- 19897081 OWN - NLM STAT- MEDLINE DCOM- 20100108 LR - 20211020 IS - 2162-5514 (Electronic) IS - 0074-7742 (Print) IS - 0074-7742 (Linking) VI - 88 DP - 2009 TI - Neural and cardiac toxicities associated with 3,4-methylenedioxymethamphetamine (MDMA). PG - 257-96 LID - 10.1016/S0074-7742(09)88010-0 [doi] AB - (+/-)-3,4-Methylenedioxymethamphetamine (MDMA) is a commonly abused illicit drug which affects multiple organ systems. In animals, high-dose administration of MDMA produces deficits in serotonin (5-HT) neurons (e.g., depletion of forebrain 5-HT) that have been viewed as neurotoxicity. Recent data implicate MDMA in the development of valvular heart disease (VHD). The present paper reviews several issues related to MDMA-associated neural and cardiac toxicities. The hypothesis of MDMA neurotoxicity in rats is evaluated in terms of the effects of MDMA on monoamine neurons, the use of scaling methods to extrapolate MDMA doses across species, and functional consequences of MDMA exposure. A potential treatment regimen (l-5-hydroxytryptophan plus carbidopa) for MDMA-associated neural deficits is discussed. The pathogenesis of MDMA-associated VHD is reviewed with specific reference to the role of valvular 5-HT(2B) receptors. We conclude that pharmacological effects of MDMA occur at the same doses in rats and humans. High doses of MDMA that produce 5-HT depletions in rats are associated with tolerance and impaired 5-HT release. Doses of MDMA that fail to deplete 5-HT in rats can cause persistent behavioral dysfunction, suggesting even moderate doses may pose risks. Finally, the MDMA metabolite, 3,4-methylenedioxyamphetamine (MDA), is a potent 5-HT(2B) agonist which could contribute to the increased risk of VHD observed in heavy MDMA users. FAU - Baumann, Michael H AU - Baumann MH AD - Clinical Psychopharmacology Section, Intramural Research Program (IRP), National Institute on Drug Abuse (NIDA), National Institutes of Health (NIH), Baltimore, Maryland 21224, USA. FAU - Rothman, Richard B AU - Rothman RB LA - eng GR - ZIA DA000562-01/ImNIH/Intramural NIH HHS/United States PT - Journal Article PT - Research Support, N.I.H., Extramural PL - United States TA - Int Rev Neurobiol JT - International review of neurobiology JID - 0374740 RN - 0 (Serotonin Agents) RN - KE1SEN21RM (N-Methyl-3,4-methylenedioxyamphetamine) SB - IM MH - Animals MH - Brain/*drug effects MH - Heart/*drug effects MH - Heart Valve Diseases/chemically induced MH - Humans MH - N-Methyl-3,4-methylenedioxyamphetamine/*toxicity MH - Neurons/drug effects MH - Neurotoxicity Syndromes/physiopathology MH - Rats MH - Serotonin Agents/*toxicity PMC - PMC3153986 MID - NIHMS313511 EDAT- 2009/11/10 06:00 MHDA- 2010/01/09 06:00 PMCR- 2011/08/10 CRDT- 2009/11/10 06:00 PHST- 2009/11/10 06:00 [entrez] PHST- 2009/11/10 06:00 [pubmed] PHST- 2010/01/09 06:00 [medline] PHST- 2011/08/10 00:00 [pmc-release] AID - S0074-7742(09)88010-0 [pii] AID - 10.1016/S0074-7742(09)88010-0 [doi] PST - ppublish SO - Int Rev Neurobiol. 2009;88:257-96. doi: 10.1016/S0074-7742(09)88010-0.