PMID- 1974858 OWN - NLM STAT- MEDLINE DCOM- 19900927 LR - 20190624 IS - 0014-2999 (Print) IS - 0014-2999 (Linking) VI - 181 IP - 1-2 DP - 1990 May 31 TI - Antagonism of the neurotoxicity due to a single administration of methylenedioxymethamphetamine. PG - 59-70 AB - The role of transmitter release in the serotonergic neurotoxicity of methylenedioxymethamphetamine (MDMA) was examined using treatments altering MDMA-induced release or its consequences. The long-term decrease in 5-HT concentrations and tryptophan hydroxylase activity produced by MDMA was antagonized by depletion of vesicular monoamines with reserpine or interruption of monoamine synthesis with the decarboxylase inhibitor, monofluoromethyl DOPA (dihydroxyphenylalanine). Similar results were achieved by selectively inhibiting dopamine synthesis with alpha-methyl-p-tyrosine or through bilateral lesions of the substantia nigra with 6-hydroxydopamine. The dopamine receptor antagonist haloperidol was also effective in this regard. Although these results strongly implicate dopamine release in the long-term neurochemical effects of MDMA, protection was also provided by selective 5-HT2 antagonists indicating that the neurotoxicity is dependent upon the release of both dopamine and 5-HT. FAU - Schmidt, C J AU - Schmidt CJ AD - Merrell Dow Research Institute, Cincinnati, OH 45215. FAU - Black, C K AU - Black CK FAU - Taylor, V L AU - Taylor VL LA - eng PT - Journal Article PL - Netherlands TA - Eur J Pharmacol JT - European journal of pharmacology JID - 1254354 RN - 0 (Amphetamines) RN - 0 (Aromatic Amino Acid Decarboxylase Inhibitors) RN - 0 (Biogenic Monoamines) RN - 0 (Catecholamines) RN - 0 (Hydroxydopamines) RN - 0 (Indoles) RN - 333DO1RDJY (Serotonin) RN - 4764-17-4 (3,4-Methylenedioxyamphetamine) RN - 64-12-0 (p-Chloroamphetamine) RN - 8B1QWR724A (Reserpine) RN - 8HW4YBZ748 (Oxidopamine) RN - EC 1.14.16.4 (Tryptophan Hydroxylase) RN - KE1SEN21RM (N-Methyl-3,4-methylenedioxyamphetamine) SB - IM MH - 3,4-Methylenedioxyamphetamine/analogs & derivatives/antagonists & inhibitors/*toxicity MH - Amphetamines/*toxicity MH - Animals MH - Aromatic Amino Acid Decarboxylase Inhibitors MH - Biogenic Monoamines/metabolism MH - Brain/drug effects/enzymology MH - Catecholamines/metabolism MH - Hydroxydopamines MH - Indoles/metabolism MH - Male MH - N-Methyl-3,4-methylenedioxyamphetamine MH - Nervous System Diseases/*prevention & control MH - Oxidopamine MH - Rats MH - Rats, Inbred Strains MH - Reserpine/pharmacology MH - Serotonin/metabolism MH - Substantia Nigra/cytology/drug effects/metabolism MH - Tryptophan Hydroxylase/metabolism MH - p-Chloroamphetamine/pharmacology EDAT- 1990/05/31 00:00 MHDA- 1990/05/31 00:01 CRDT- 1990/05/31 00:00 PHST- 1990/05/31 00:00 [pubmed] PHST- 1990/05/31 00:01 [medline] PHST- 1990/05/31 00:00 [entrez] AID - 0014-2999(90)90245-2 [pii] AID - 10.1016/0014-2999(90)90245-2 [doi] PST - ppublish SO - Eur J Pharmacol. 1990 May 31;181(1-2):59-70. doi: 10.1016/0014-2999(90)90245-2.