PMID- 2448703 OWN - NLM STAT- MEDLINE DCOM- 19880309 LR - 20190726 IS - 0028-3908 (Print) IS - 0028-3908 (Linking) VI - 26 IP - 11 DP - 1987 Nov TI - Differences in the central serotonergic effects of methylenedioxymethamphetamine (MDMA) in mice and rats. PG - 1657-61 AB - The effects of subcutaneous injection of 3,4-methylenedioxymethamphetamine (MDMA), a psychoactive amphetamine congener, on mouse central monoaminergic systems were assessed and compared to effects in rats. Whereas neostriatal concentrations of 5-hydroxytryptamine and 5-hydroxyindoleacetic acid in mouse were transiently decreased after a single moderately high dose of MDMA (15 mg/kg), mouse neostriatal or hippocampal tryptophan hydroxylase activity was not significantly affected, even after a dose of 60 mg/kg. These results are in contrast to effects in rats, in which a single 10 mg/kg dose of MDMA induced immediate and prolonged decreases in both central tryptophan hydroxylase activity and 5-hydroxyindole concentrations. Decreases in mouse central tryptophan hydroxylase activity, and prolonged decreases in mouse 5-hydroxyindole concentrations, were observed only after multiple doses of MDMA, suggesting that the duration of exposure may be an important determinant of toxic effects. These results show mice to be less susceptible than rats to MDMA-induced neurotoxicity, and are discussed in terms of possible interspecies differences in MDMA pharmacokinetics. FAU - Stone, D M AU - Stone DM AD - Department of Pharmacology and Toxicology, University of Utah, Salt Lake City 84112. FAU - Hanson, G R AU - Hanson GR FAU - Gibb, J W AU - Gibb JW LA - eng GR - DA 04222/DA/NIDA NIH HHS/United States GR - DA 08869/DA/NIDA NIH HHS/United States PT - Journal Article PT - Research Support, U.S. Gov't, P.H.S. PL - England TA - Neuropharmacology JT - Neuropharmacology JID - 0236217 RN - 0 (Amphetamines) RN - 0 (Biogenic Amines) RN - 0 (Receptors, Serotonin) RN - 333DO1RDJY (Serotonin) RN - 4764-17-4 (3,4-Methylenedioxyamphetamine) RN - 54-16-0 (Hydroxyindoleacetic Acid) RN - EC 1.14.16.4 (Tryptophan Hydroxylase) RN - KE1SEN21RM (N-Methyl-3,4-methylenedioxyamphetamine) SB - IM MH - 3,4-Methylenedioxyamphetamine/analogs & derivatives/*toxicity MH - Amphetamines/*toxicity MH - Animals MH - Biogenic Amines/metabolism MH - Brain/enzymology MH - Corpus Striatum/drug effects/metabolism MH - Hippocampus/drug effects/metabolism MH - Hydroxyindoleacetic Acid/metabolism MH - Male MH - Mice MH - Mice, Inbred Strains MH - N-Methyl-3,4-methylenedioxyamphetamine MH - Rats MH - Rats, Inbred Strains MH - Receptors, Serotonin/*drug effects MH - Serotonin/metabolism MH - Species Specificity MH - Time Factors MH - Tryptophan Hydroxylase/metabolism EDAT- 1987/11/01 00:00 MHDA- 1987/11/01 00:01 CRDT- 1987/11/01 00:00 PHST- 1987/11/01 00:00 [pubmed] PHST- 1987/11/01 00:01 [medline] PHST- 1987/11/01 00:00 [entrez] AID - 10.1016/0028-3908(87)90017-7 [doi] PST - ppublish SO - Neuropharmacology. 1987 Nov;26(11):1657-61. doi: 10.1016/0028-3908(87)90017-7.