PMID- 7698172 OWN - NLM STAT- MEDLINE DCOM- 19950428 LR - 20190624 IS - 0014-2999 (Print) IS - 0014-2999 (Linking) VI - 264 IP - 3 DP - 1994 Nov 3 TI - Potentiation of 3,4-methylenedioxymethamphetamine-induced dopamine release and serotonin neurotoxicity by 5-HT2 receptor agonists. PG - 325-30 AB - The effects of the 5-HT2 receptor agonists 1-(2,5-dimethoxy-4-iodophenyl)-2-aminopropane (DOI) and 5-methoxy-N,N-dimethyltryptamine (5-MeODMT) on 3,4-methylenedioxymethamphetamine (MDMA)-induced dopamine release and 5-HT depletion in the striatum were studied. The MDMA-induced increase in the extracellular concentration of dopamine in the striatum was enhanced significantly in rats treated with either DOI (2 mg/kg, ip.) or 5-MeODMT (15 mg/kg, ip.), as assessed using in vivo microdialysis. Neither DOI nor 5-MeODMT alone altered the extracellular concentration of dopamine in the striatum. The striatal concentration of 5-HT was decreased, but not significantly, 7 days following a single administration of MDMA (10 mg/kg, sc.). However, 7 days following the concomitant treatment with DOI and MDMA the striatal concentration of 5-HT was significantly less than that in rats treated with MDMA alone or the vehicle-treated controls. It is concluded that activation of 5-HT2 receptors is an important determinant of the acute increase in extracellular dopamine and, consequently, the long-term depletion of brain 5-HT produced by MDMA. FAU - Gudelsky, G A AU - Gudelsky GA AD - Department of Psychiatry, School of Medicine, Case Western Reserve University, Cleveland, OH 44106. FAU - Yamamoto, B K AU - Yamamoto BK FAU - Nash, J F AU - Nash JF LA - eng GR - DA 07427/DA/NIDA NIH HHS/United States PT - Comparative Study PT - Journal Article PT - Research Support, U.S. Gov't, P.H.S. PL - Netherlands TA - Eur J Pharmacol JT - European journal of pharmacology JID - 1254354 RN - 0 (Amphetamines) RN - 0 (Methoxydimethyltryptamines) RN - 0 (Serotonin Receptor Agonists) RN - 333DO1RDJY (Serotonin) RN - KE1SEN21RM (N-Methyl-3,4-methylenedioxyamphetamine) RN - OOM10GW9UE (4-iodo-2,5-dimethoxyphenylisopropylamine) RN - VTD58H1Z2X (Dopamine) SB - IM MH - Amphetamines/administration & dosage/*pharmacology MH - Analysis of Variance MH - Animals MH - Corpus Striatum/*drug effects/metabolism MH - Dopamine/*metabolism MH - Injections, Subcutaneous MH - Male MH - Methoxydimethyltryptamines/administration & dosage/*pharmacology MH - Microdialysis MH - N-Methyl-3,4-methylenedioxyamphetamine/administration & dosage/pharmacology MH - Rats MH - Rats, Sprague-Dawley MH - Serotonin/*metabolism MH - Serotonin Receptor Agonists/administration & dosage/*pharmacology EDAT- 1994/11/03 00:00 MHDA- 1994/11/03 00:01 CRDT- 1994/11/03 00:00 PHST- 1994/11/03 00:00 [pubmed] PHST- 1994/11/03 00:01 [medline] PHST- 1994/11/03 00:00 [entrez] AID - 0014-2999(94)90669-6 [pii] AID - 10.1016/0014-2999(94)90669-6 [doi] PST - ppublish SO - Eur J Pharmacol. 1994 Nov 3;264(3):325-30. doi: 10.1016/0014-2999(94)90669-6.