PMID- 1691459 OWN - NLM STAT- MEDLINE DCOM- 19900524 LR - 20190726 IS - 0028-3908 (Print) IS - 0028-3908 (Linking) VI - 29 IP - 3 DP - 1990 Mar TI - Enantiomeric differences in the effects of 3,4-methylenedioxymethamphetamine on extracellular monoamines and metabolites in the striatum of freely-moving rats: an in vivo microdialysis study. PG - 269-75 AB - The effects of (+) and (-) 3,4-methylenedioxymethamphetamine (MDMA) and racemic p-chloroamphetamine (PCA) on extracellular dopamine and its metabolites, 3,4-dihydroxyphenylacetic acid (DOPAC) and homovanillic acid (HVA), as well as the metabolite of 5-hydroxytryptamine (5-HT), 5-hydroxyindoleacetic acid (5-HIAA), were determined in dialysates of the striatum conscious rats by using intracerebral dialysis and high performance liquid chromatography with electrochemical detection (HPLC-EC). The (+) and (-)MDMA isomers (5, 10 mg/kg, s.c.) and PCA (2.5, 5 mg/kg, s.c.) caused a rapid increase of extracellular levels of dopamine and decreased extracellular levels of DOPAC and HVA immediately after administration in dialysates of striatum. The order of potency for this effect was PCA greater than (+)MDMA greater than (-)MDMA. The levels of 5-HIAA also decreased after the administration of drugs, but the effect had a slower time course than DOPAC and HVA and did not exhibit an enantiomeric difference. The data indicate that, although these drugs are thought to affect the 5-HT neuronal system preferentially, they also affect dopamine systems and by a mechanism in which the (+) isomer was more potent than the (-). FAU - Hiramatsu, M AU - Hiramatsu M AD - Department of Pharmacology, UCLA School of Medicine 90024-1735. FAU - Cho, A K AU - Cho AK LA - eng GR - DA 04206/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 Monoamines) RN - 102-32-9 (3,4-Dihydroxyphenylacetic Acid) RN - 333DO1RDJY (Serotonin) RN - 4764-17-4 (3,4-Methylenedioxyamphetamine) RN - 54-16-0 (Hydroxyindoleacetic Acid) RN - KE1SEN21RM (N-Methyl-3,4-methylenedioxyamphetamine) RN - R5J7E3L9SP (Fenclonine) RN - VTD58H1Z2X (Dopamine) RN - X77S6GMS36 (Homovanillic Acid) SB - IM MH - 3,4-Dihydroxyphenylacetic Acid/metabolism MH - 3,4-Methylenedioxyamphetamine/analogs & derivatives/*pharmacology MH - Amphetamines/*pharmacology MH - Animals MH - Biogenic Monoamines/*metabolism MH - Chromatography, High Pressure Liquid MH - Corpus Striatum/drug effects/*metabolism MH - Dialysis MH - Dopamine/metabolism MH - Electrochemistry MH - Fenclonine/pharmacology MH - Homovanillic Acid/metabolism MH - Hydroxyindoleacetic Acid/metabolism MH - Male MH - N-Methyl-3,4-methylenedioxyamphetamine MH - Rats MH - Rats, Inbred Strains MH - Serotonin/metabolism MH - Stereoisomerism EDAT- 1990/03/01 00:00 MHDA- 1990/03/01 00:01 CRDT- 1990/03/01 00:00 PHST- 1990/03/01 00:00 [pubmed] PHST- 1990/03/01 00:01 [medline] PHST- 1990/03/01 00:00 [entrez] AID - 10.1016/0028-3908(90)90012-g [doi] PST - ppublish SO - Neuropharmacology. 1990 Mar;29(3):269-75. doi: 10.1016/0028-3908(90)90012-g.