PMID- 19851718 OWN - NLM STAT- MEDLINE DCOM- 20100920 LR - 20211028 IS - 1476-3524 (Electronic) IS - 1029-8428 (Print) IS - 1029-8428 (Linking) VI - 18 IP - 2 DP - 2010 Aug TI - Mice lacking multidrug resistance protein 1a show altered dopaminergic responses to methylenedioxymethamphetamine (MDMA) in striatum. PG - 200-9 LID - 10.1007/s12640-009-9124-z [doi] AB - Multidrug resistance protein 1a (MDR1a) potentiated methylenedioxymethamphetamine (MDMA)-induced decreases of dopamine (DA) and dopamine transport protein in mouse brain one week after MDMA administration. In the present study, we examined if mdr1a wild-type (mdr1a +/+) and knock-out (mdr1a -/-) mice differentially handle the acute effects of MDMA on the nigrostriatal DA system 0-24 h following a single drug injection. 3-way ANOVA revealed significant 2-way interactions of strain x time (F (5,152) = 32.4, P < 0.001) and strain x dose (F (3,152) = 25.8, P < 0.001) on 3,4-dihydroxyphenylacetic acid (DOPAC)/DA ratios in mdr1a +/+ and -/- mice. 0.3-3 h after 10 mg/kg MDMA, DOPAC/DA ratios were increased in mdr1a +/+ mice, but decreased 0.3-1 h after MDMA in mdr1a -/- mice. Twenty-four hours after 10 mg/kg MDMA, DOPAC/DA ratios were increased 600% in mdr1a +/+ mice compared to saline-treated control mice, while in mdr1a -/- mice DOPAC/DA ratios were unchanged. Striatal MDMA and its metabolite, methylenedioxyamphetamine, concentrations by gas chromatography-mass spectrometry were similar in both strains 0.3-4 h after MDMA, discounting the role of MDR1a-facilitated MDMA transport in observed inter-strain differences. Increased DOPAC/DA turnover in mdr1a +/+ mice following MDMA is consistent with the previous report that MDMA neurotoxicity is increased in mdr1a +/+ mice. Increased DA turnover via monoamine oxidase in mdr1a +/+ vs -/- mice might increase exposure to neurotoxic reactive oxygen species. FAU - Scheidweiler, Karl B AU - Scheidweiler KB AD - Chemistry and Drug Metabolism, Intramural Research Program, National Institutes of Health, Biomedical Research Center, 251 Bayview Boulevard Suite 200, Room 05A-721, Baltimore, MD 21224, USA. FAU - Ladenheim, Bruce AU - Ladenheim B FAU - Cadet, Jean Lud AU - Cadet JL FAU - Huestis, Marilyn A AU - Huestis MA LA - eng GR - ZIA DA000540-03/ImNIH/Intramural NIH HHS/United States PT - Journal Article PT - Research Support, N.I.H., Intramural DEP - 20091023 PL - United States TA - Neurotox Res JT - Neurotoxicity research JID - 100929017 RN - 0 (ATP Binding Cassette Transporter, Subfamily B, Member 1) 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 - VTD58H1Z2X (Dopamine) RN - X77S6GMS36 (Homovanillic Acid) SB - IM MH - 3,4-Dihydroxyphenylacetic Acid/metabolism MH - 3,4-Methylenedioxyamphetamine/pharmacokinetics MH - ATP Binding Cassette Transporter, Subfamily B, Member 1/*genetics MH - Animals MH - Corpus Striatum/*drug effects/metabolism MH - Dopamine/*metabolism MH - Homovanillic Acid/metabolism MH - Hydroxyindoleacetic Acid/metabolism MH - Male MH - Mice MH - Mice, Inbred Strains MH - Mice, Knockout MH - N-Methyl-3,4-methylenedioxyamphetamine/pharmacokinetics/*pharmacology MH - Serotonin/metabolism PMC - PMC2917895 MID - NIHMS223884 EDAT- 2009/10/24 06:00 MHDA- 2010/09/21 06:00 PMCR- 2011/08/01 CRDT- 2009/10/24 06:00 PHST- 2009/04/24 00:00 [received] PHST- 2009/10/07 00:00 [accepted] PHST- 2009/08/04 00:00 [revised] PHST- 2009/10/24 06:00 [entrez] PHST- 2009/10/24 06:00 [pubmed] PHST- 2010/09/21 06:00 [medline] PHST- 2011/08/01 00:00 [pmc-release] AID - 10.1007/s12640-009-9124-z [doi] PST - ppublish SO - Neurotox Res. 2010 Aug;18(2):200-9. doi: 10.1007/s12640-009-9124-z. Epub 2009 Oct 23.