PMID: 15228153Jul 2, 2004Paper

The role of metabolism in 3,4-(+)-methylenedioxyamphetamine and 3,4-(+)-methylenedioxymethamphetamine (ecstasy) toxicity

Therapeutic Drug Monitoring
Terrence J MonksSerrine S Lau

Abstract

3,4-Methylenedioxyamphetamine (MDA) and 3,4-methylenedioxymethamphetamine (MDMA, ecstasy) are ring-substituted amphetamine derivatives with stimulant and hallucinogenic properties. The recreational use of these amphetamines, especially MDMA, is prevalent despite warnings of irreversible damage to the central nervous system. MDA and MDMA are primarily serotonergic neurotoxicants. Because (1) neither MDA nor MDMA produces neurotoxicity when injected directly into brain, (2) intracerebroventricular (i.c.v.) administration of some major metabolites of MDA and MDMA fails to reproduce their neurotoxicity, (3) alpha-methyldopamine (alpha-MeDA) and N-methyl-alpha-MeDA are metabolites of both MDA and MDMA, (4) alpha-MeDA and N-methyl-alpha-MeDA are readily oxidized to the corresponding ortho-quinones, which can undergo conjugation with glutathione (GSH), and (5) quinone thioethers exhibit a variety of toxicologic activities, we initiated studies on the potential role of thioether metabolites of alpha-MeDA and N-methyl-alpha-MeDA in the neurotoxicity of MDA and MDMA. Our studies have revealed that the thioether conjugates stimulate the acute release of serotonin, dopamine, and norepinephrine and produce a behavioral response commensurate...Continue Reading

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