PMID- 17070798 OWN - NLM STAT- MEDLINE DCOM- 20070124 LR - 20231213 IS - 0014-2999 (Print) IS - 0014-2999 (Linking) VI - 553 IP - 1-3 DP - 2006 Dec 28 TI - Interactions between 3,4-methylenedioxymethamphetamine and sigma1 receptors. PG - 141-5 AB - Methamphetamine and 3,4-methylenedioxymethamphetamine (MDMA) are structurally similar and represent a serious and growing health threat. Earlier studies in our laboratory have shown that methamphetamine interacts with sigma receptors and that antagonism of these receptors can attenuate methamphetamine-induced locomotor stimulation and neurotoxicity. However, no research exists which characterizes the interaction between sigma receptors and MDMA. Therefore, the goal of the present study was to determine whether sigma receptors are involved in the actions of MDMA. In the first part of the study, competition and saturation binding assays were performed to measure the interaction of MDMA with sigma receptors. The receptor binding assays revealed that MDMA interacts preferentially with the sigma(1) subtype, as compared to the sigma(2) subtype, and that this interaction occurs in a competitive manner. The second part of the study focused on behavioral measurements in male, Swiss Webster mice to determine whether a selective sigma(1) receptor antagonist, BD1063 (1-[2-(3,4-dichlorophenyl)ethyl]-4-methylpiperazine, 0-30 mg/kg, i.p.) could attenuate the locomotor stimulant actions of MDMA (0-50 mg/kg, i.p.). BD1063 alone had no effect on locomotor activity, but dose-dependently attenuated the locomotor stimulant effects of MDMA and produced a significant shift to the right in the MDMA dose response curve. Together, the data support the functional relevance of the interaction of MDMA with sigma(1) receptors, and suggest that these receptors are involved in the stimulant actions of MDMA. FAU - Brammer, Matthew K AU - Brammer MK AD - Department of Pharmaceutical Sciences, College of Pharmacy, University of Oklahoma Health Sciences Center, Oklahoma City, OK, 73190 USA. FAU - Gilmore, Deborah L AU - Gilmore DL FAU - Matsumoto, Rae R AU - Matsumoto RR LA - eng GR - R01 DA011979/DA/NIDA NIH HHS/United States GR - R01 DA013978/DA/NIDA NIH HHS/United States GR - DA11979/DA/NIDA NIH HHS/United States GR - DA13978/DA/NIDA NIH HHS/United States PT - Journal Article PT - Research Support, N.I.H., Extramural PT - Research Support, Non-U.S. Gov't DEP - 20060928 PL - Netherlands TA - Eur J Pharmacol JT - European journal of pharmacology JID - 1254354 RN - 0 (1-(2-(3,4-dichlorophenyl)ethyl)-4-methylpiperazine) RN - 0 (Central Nervous System Stimulants) RN - 0 (Dopamine Plasma Membrane Transport Proteins) RN - 0 (Hallucinogens) RN - 0 (Norepinephrine Plasma Membrane Transport Proteins) RN - 0 (Piperazines) RN - 0 (Receptors, sigma) RN - 0 (Serotonin Plasma Membrane Transport Proteins) RN - 0 (sigma-2 receptor) RN - KE1SEN21RM (N-Methyl-3,4-methylenedioxyamphetamine) SB - IM MH - Animals MH - Behavior, Animal/drug effects MH - Binding, Competitive/drug effects MH - Central Nervous System Stimulants/pharmacology MH - Dopamine Plasma Membrane Transport Proteins/metabolism MH - Dose-Response Relationship, Drug MH - Hallucinogens/*pharmacology MH - Male MH - Mice MH - Motor Activity/drug effects MH - N-Methyl-3,4-methylenedioxyamphetamine/*pharmacology MH - Norepinephrine Plasma Membrane Transport Proteins/metabolism MH - Piperazines/pharmacology MH - Protein Binding/drug effects MH - Radioligand Assay MH - Rats MH - Rats, Sprague-Dawley MH - Receptors, sigma/*drug effects MH - Serotonin Plasma Membrane Transport Proteins/metabolism MH - Sigma-1 Receptor PMC - PMC1780037 MID - NIHMS14306 EDAT- 2006/10/31 09:00 MHDA- 2007/01/25 09:00 PMCR- 2007/12/28 CRDT- 2006/10/31 09:00 PHST- 2006/06/01 00:00 [received] PHST- 2006/09/15 00:00 [revised] PHST- 2006/09/19 00:00 [accepted] PHST- 2006/10/31 09:00 [pubmed] PHST- 2007/01/25 09:00 [medline] PHST- 2006/10/31 09:00 [entrez] PHST- 2007/12/28 00:00 [pmc-release] AID - S0014-2999(06)01070-3 [pii] AID - 10.1016/j.ejphar.2006.09.038 [doi] PST - ppublish SO - Eur J Pharmacol. 2006 Dec 28;553(1-3):141-5. doi: 10.1016/j.ejphar.2006.09.038. Epub 2006 Sep 28.