PMID- 31729537 OWN - NLM STAT- MEDLINE DCOM- 20200804 LR - 20210201 IS - 1432-2072 (Electronic) IS - 0033-3158 (Print) IS - 0033-3158 (Linking) VI - 237 IP - 2 DP - 2020 Feb TI - Locomotor effects of 3,4-methylenedioxymethamphetamine (MDMA) and its deuterated form in mice: psychostimulant effects, stereotypy, and sensitization. PG - 431-442 LID - 10.1007/s00213-019-05380-3 [doi] AB - RATIONALE: There is a renewed interest in the use of 3,4-methylenedioxymethamphetamine (MDMA) for treating psychiatric conditions. Although MDMA has entered phase II clinical trials and shows promise as an adjunct treatment, there is an extensive literature detailing the potential neurotoxicity and adverse neurobehavioral effects associated with MDMA use. Previous research indicates that the adverse effects of MDMA may be due to its metabolism into reactive catechols that can enter the brain and serve directly as neurotoxicants. One approach to mitigate MDMA's potential for adverse effects is to reduce O-demethylation by deuterating the methylenedioxy ring of MDMA. There are no studies that have evaluated the effects of deuterating MDMA on behavioral outcomes. OBJECTIVES: The purpose of the present study was to assess the motor-stimulant effects of deuterated MDMA (d2-MDMA) and compare them to MDMA in male mice. METHODS: Two experiments were performed to quantify mouse locomotor activity and to vary the drug administration regimen (single bolus administration or cumulative administration). RESULTS: The results of Experiments 1 and 2 indicate that d2-MDMA is less effective at eliciting horizontal locomotion than MDMA; however, the differences between the compounds diminish as the number of cumulative administrations increase. Both d2-MDMA and MDMA can elicit sensitized responses, and these effects cross-sensitize to the prototypical drug of abuse methamphetamine. Thus, d2-MDMA functions as a locomotor stimulant similar to MDMA, but, depending on the dosing regimen, may be less susceptible to inducing sensitization to stereotyped movements. CONCLUSIONS: These findings indicate that d2-MDMA is behaviorally active and produces locomotor effects that are similar to MDMA, which warrant additional assessments of d2-MDMA's behavioral and physiological effects to determine the conditions under which this compound may serve as a relatively safer alternative to MDMA for clinical use. FAU - Berquist, Michael D AU - Berquist MD AD - Department of Pharmacology and Toxicology, College of Medicine, University of Arkansas for Medical Sciences, 4301 W. Markham #611, Little Rock, AR, 72205, USA. FAU - Leth-Petersen, Sebastian AU - Leth-Petersen S AD - Department of Drug Design and Pharmacology, Faculty of Health and Medical Sciences, University of Copenhagen, Universitetsparken 2, 2100, Kobenhavn O, Denmark. FAU - Kristensen, Jesper Langgaard AU - Kristensen JL AD - Department of Drug Design and Pharmacology, Faculty of Health and Medical Sciences, University of Copenhagen, Universitetsparken 2, 2100, Kobenhavn O, Denmark. FAU - Fantegrossi, William E AU - Fantegrossi WE AD - Department of Pharmacology and Toxicology, College of Medicine, University of Arkansas for Medical Sciences, 4301 W. Markham #611, Little Rock, AR, 72205, USA. WEFantegrossi@uams.edu. LA - eng GR - P30 GM110702/GM/NIGMS NIH HHS/United States GR - R01 DA039195/DA/NIDA NIH HHS/United States GR - HHSF223201610079C/DEA/FDA/ GR - DA022981/NH/NIH HHS/United States GR - GM110702/NH/NIH HHS/United States GR - T32 DA022981/DA/NIDA NIH HHS/United States PT - Journal Article DEP - 20191115 PL - Germany TA - Psychopharmacology (Berl) JT - Psychopharmacology JID - 7608025 RN - 0 (Adrenergic Uptake Inhibitors) RN - 0 (Central Nervous System Stimulants) RN - KE1SEN21RM (N-Methyl-3,4-methylenedioxyamphetamine) SB - IM MH - Adrenergic Uptake Inhibitors/chemistry/pharmacology MH - Animals MH - Central Nervous System Stimulants/chemistry/*pharmacology MH - Locomotion/*drug effects/physiology MH - Male MH - Mice MH - N-Methyl-3,4-methylenedioxyamphetamine/chemistry/*pharmacology MH - Stereotyped Behavior/*drug effects/physiology PMC - PMC7388080 MID - NIHMS1543349 OTO - NOTNLM OT - 3,4-Methylenedioxymethamphetamine OT - Cross-sensitization OT - Cumulative administration OT - Deuterium substitution OT - Locomotor activity OT - MDMA OT - Methamphetamine OT - Sensitization OT - Stereotypy COIS- Conflict of interest MDB, SLP, JLK, and WEF declare that they have no conflict of interest. Conflict of interest: None EDAT- 2019/11/16 06:00 MHDA- 2020/08/05 06:00 PMCR- 2021/02/01 CRDT- 2019/11/16 06:00 PHST- 2019/05/23 00:00 [received] PHST- 2019/10/16 00:00 [accepted] PHST- 2019/11/16 06:00 [pubmed] PHST- 2020/08/05 06:00 [medline] PHST- 2019/11/16 06:00 [entrez] PHST- 2021/02/01 00:00 [pmc-release] AID - 10.1007/s00213-019-05380-3 [pii] AID - 10.1007/s00213-019-05380-3 [doi] PST - ppublish SO - Psychopharmacology (Berl). 2020 Feb;237(2):431-442. doi: 10.1007/s00213-019-05380-3. Epub 2019 Nov 15.