PMID- 26093344 OWN - NLM STAT- MEDLINE DCOM- 20160408 LR - 20191210 IS - 1878-4216 (Electronic) IS - 0278-5846 (Linking) VI - 63 DP - 2015 Dec 3 TI - Long-term effects of repeated social stress on the conditioned place preference induced by MDMA in mice. PG - 98-109 LID - S0278-5846(15)00133-5 [pii] LID - 10.1016/j.pnpbp.2015.06.006 [doi] AB - Previous studies have demonstrated that social defeat stress increases the rewarding effects of psychostimulant drugs such as cocaine and amphetamine. In the present study we evaluated the long-term effects of repeated social defeat (RSD) on the rewarding effects of +/-3,4-methylenedioxymethamphetamine (MDMA) hydrochloride in the conditioned place preference (CPP) paradigm. Adolescent and young adult mice were exposed to four episodes of social defeat (on PND 29-40 and PND 47-56, respectively) and were conditioned three weeks later with 1.25 or 10mg/kg i.p. of MDMA (experiment 1). The long-term effects of RSD on anxiety, social behavior and cognitive processes were also evaluated in adult mice (experiment 2). RSD during adolescence enhanced vulnerability to priming-induced reinstatement in animals conditioned with 1.25mg/kg of MDMA and increased the duration of the CPP induced by the 10mg/kg of MDMA. The latter effect was also observed after RSD in young adult mice, as well as an increase in anxiety-like behavior, an alteration in social interaction (reduction in attack and increase in avoidance/flee and defensive/submissive behaviors) and an impairment of maze learning. These results support the idea that RSD stress increases the rewarding effects of MDMA and induces long-term alterations in anxiety, learning and social behavior in adult mice. Thus, exposure to stress may increase the vulnerability of individuals to developing MDMA dependence, which is a factor to be taken into account in relation to the prevention and treatment of this disorder. CI - Copyright (c) 2015 Elsevier Inc. All rights reserved. FAU - Garcia-Pardo, M P AU - Garcia-Pardo MP AD - Unidad de Investigacion Psicobiologia de las Drogodependencias, Departamento de Psicobiologia, Facultad de Psicologia, Universidad de Valencia, Spain. FAU - Blanco-Gandia, M C AU - Blanco-Gandia MC AD - Unidad de Investigacion Psicobiologia de las Drogodependencias, Departamento de Psicobiologia, Facultad de Psicologia, Universidad de Valencia, Spain. FAU - Valiente-Lluch, M AU - Valiente-Lluch M AD - Unidad de Investigacion Psicobiologia de las Drogodependencias, Departamento de Psicobiologia, Facultad de Psicologia, Universidad de Valencia, Spain. FAU - Rodriguez-Arias, M AU - Rodriguez-Arias M AD - Unidad de Investigacion Psicobiologia de las Drogodependencias, Departamento de Psicobiologia, Facultad de Psicologia, Universidad de Valencia, Spain. FAU - Minarro, J AU - Minarro J AD - Unidad de Investigacion Psicobiologia de las Drogodependencias, Departamento de Psicobiologia, Facultad de Psicologia, Universidad de Valencia, Spain. FAU - Aguilar, M A AU - Aguilar MA AD - Unidad de Investigacion Psicobiologia de las Drogodependencias, Departamento de Psicobiologia, Facultad de Psicologia, Universidad de Valencia, Spain. Electronic address: asuncion.aguilar@uv.es. LA - eng PT - Journal Article PT - Research Support, Non-U.S. Gov't DEP - 20150618 PL - England TA - Prog Neuropsychopharmacol Biol Psychiatry JT - Progress in neuro-psychopharmacology & biological psychiatry JID - 8211617 RN - 0 (Adrenal Cortex Hormones) RN - 0 (Hallucinogens) RN - KE1SEN21RM (N-Methyl-3,4-methylenedioxyamphetamine) SB - IM MH - Adrenal Cortex Hormones/blood MH - Age Factors MH - Analysis of Variance MH - Animals MH - Avoidance Learning/drug effects MH - Conditioning, Operant/*drug effects MH - Dose-Response Relationship, Drug MH - Extinction, Psychological/drug effects MH - Hallucinogens/*pharmacology MH - Interpersonal Relations MH - Male MH - Maze Learning/drug effects MH - Mice MH - N-Methyl-3,4-methylenedioxyamphetamine/*pharmacology MH - Reinforcement, Psychology MH - Stress, Psychological/*physiopathology/psychology OTO - NOTNLM OT - Adolescence OT - Conditioned place preference OT - MDMA OT - Mice OT - Repeated social defeat EDAT- 2015/06/21 06:00 MHDA- 2016/04/09 06:00 CRDT- 2015/06/21 06:00 PHST- 2015/03/15 00:00 [received] PHST- 2015/05/26 00:00 [revised] PHST- 2015/06/09 00:00 [accepted] PHST- 2015/06/21 06:00 [entrez] PHST- 2015/06/21 06:00 [pubmed] PHST- 2016/04/09 06:00 [medline] AID - S0278-5846(15)00133-5 [pii] AID - 10.1016/j.pnpbp.2015.06.006 [doi] PST - ppublish SO - Prog Neuropsychopharmacol Biol Psychiatry. 2015 Dec 3;63:98-109. doi: 10.1016/j.pnpbp.2015.06.006. Epub 2015 Jun 18.