PMID- 19523041 OWN - NLM STAT- MEDLINE DCOM- 20090924 LR - 20211020 IS - 1369-1600 (Electronic) IS - 1355-6215 (Print) IS - 1355-6215 (Linking) VI - 14 IP - 3 DP - 2009 Jul TI - Modulation of MDMA-induced behavioral and transcriptional effects by the delta opioid antagonist naltrindole in mice. PG - 245-52 LID - 10.1111/j.1369-1600.2009.00156.x [doi] AB - The delta opioid system is involved in the behavioral effects of various drugs of abuse. However, only a few studies have focused on the possible interactions between the opioid system and the effects of 3,4-methylenedioxymethamphetamine (MDMA). In order to examine the possible role of the delta opioid system in MDMA-induced behaviors in mice, locomotor activity and conditioned place preference (CPP) were investigated in the presence of naltrindole (NTI), a selective delta opioid antagonist. Moreover, the consequences of acute and chronic MDMA administration on pro-enkephalin (Penk) and pro-opiomelanocortin (Pomc) gene expression were assessed by real-time quantitative polymerase chain reaction (QPCR). The results showed that, after acute MDMA administration (9 mg/kg; i.p.), NTI (5 mg/kg, s.c.) was able to totally block MDMA-induced hyperlocomotion. Penk gene expression was not modulated by acute MDMA, but a decrease of Pomc gene expression was observed, which was not antagonized by NTI. Administration of the antagonist prevented the acquisition of MDMA-induced CPP, suggesting an implication of the delta opioid receptors in this behavior. Following chronic MDMA treatment, only the level of Pomc was modulated. The observed increase was totally blocked by NTI pre-treatment. All these results confirm the interactions between the delta opioid system (receptors and peptides) and the effects of MDMA. FAU - Belkai, Emilie AU - Belkai E AD - Laboratoire de Neuropsychopharmacologie des addictions (INSERM U705, CNRS UMR 7157), Universite Paris Descartes, Faculte de Pharmacie, 4 avenue de l'Observatoire, Paris, France. FAU - Scherrmann, Jean-Michel AU - Scherrmann JM FAU - Noble, Florence AU - Noble F FAU - Marie-Claire, Cynthia AU - Marie-Claire C LA - eng PT - Journal Article PL - United States TA - Addict Biol JT - Addiction biology JID - 9604935 RN - 0 (Enkephalins) RN - 0 (Hallucinogens) RN - 0 (Narcotic Antagonists) RN - 0 (Protein Precursors) RN - 0 (RNA, Messenger) RN - 0 (Receptors, Opioid, delta) RN - 0 (proenkephalin) RN - 5S6W795CQM (Naltrexone) RN - 66796-54-1 (Pro-Opiomelanocortin) RN - G167Z38QA4 (naltrindole) RN - KE1SEN21RM (N-Methyl-3,4-methylenedioxyamphetamine) SB - IM MH - Amphetamine-Related Disorders/*genetics MH - Animals MH - Behavior, Animal/*drug effects MH - Brain/drug effects MH - Choice Behavior/drug effects MH - Conditioning, Classical/drug effects MH - Enkephalins/*genetics MH - Gene Expression/drug effects/genetics MH - Hallucinogens/*toxicity MH - Mice MH - Motor Activity/drug effects MH - N-Methyl-3,4-methylenedioxyamphetamine/*toxicity MH - Naltrexone/*analogs & derivatives/pharmacology MH - Narcotic Antagonists/*pharmacology MH - Pro-Opiomelanocortin/*genetics MH - Protein Precursors/*genetics MH - RNA, Messenger/genetics MH - Receptors, Opioid, delta/*antagonists & inhibitors MH - Social Environment MH - Transcription, Genetic/*drug effects PMC - PMC2922624 MID - HALMS416565 OID - NLM: HALMS416565 EDAT- 2009/06/16 09:00 MHDA- 2009/09/25 06:00 PMCR- 2010/08/17 CRDT- 2009/06/16 09:00 PHST- 2009/06/16 09:00 [entrez] PHST- 2009/06/16 09:00 [pubmed] PHST- 2009/09/25 06:00 [medline] PHST- 2010/08/17 00:00 [pmc-release] AID - ADB156 [pii] AID - 10.1111/j.1369-1600.2009.00156.x [doi] PST - ppublish SO - Addict Biol. 2009 Jul;14(3):245-52. doi: 10.1111/j.1369-1600.2009.00156.x.