PMID- 15899478 OWN - NLM STAT- MEDLINE DCOM- 20050829 LR - 20131121 IS - 0014-2999 (Print) IS - 0014-2999 (Linking) VI - 516 IP - 1 DP - 2005 May 23 TI - 3,4-Methylenedioxymethamphetamine and naloxone in rat rotational behaviour and open field. PG - 34-9 AB - It has recently been shown that 3,4-Methylenedioxymethamphetamine (MDMA) has an anti-parkinsonian effect in rodent models of Parkinson's disease. The mechanism of this anti-parkinsonian action is unknown. Opioids have been suggested to play a role in MDMA-induced behaviour. We therefore investigated MDMA and naloxone in the rat rotational behavioural model. Male Sprague-Dawley rats were lesioned unilaterally with 6-hydroxydopamine at the medial forebrain bundle. Administration of R/S-MDMA (5 mg/kg, s.c.) produced ipsilateral rotations. Naloxone (2, 5, 10 mg/kg, s.c.) did not produce rotations on its own but reduced the number of MDMA-induced ipsilateral rotations. This effect was not dose-dependent. In contrast to reports on mice, in unlesioned animals, naloxone (10 mg/kg, s.c.) did not block MDMA (5 mg/kg, s.c.)-induced hyperactivity in an open field in our experiment. It is concluded that endogenous opioids play a role in MDMA's action in the rat rotational behavioural model. FAU - Lebsanft, Heike B AU - Lebsanft HB AD - Department Neuropharmacology, Zoological Institute, Faculty of Biology, University of Tuebingen, Auf der Morgenstelle 28 E, 72076 Tuebingen, Germany. heike.lebsanft@uni-tuebingen.de FAU - Kovar, Karl-Artur AU - Kovar KA FAU - Schmidt, Werner J AU - Schmidt WJ LA - eng PT - Comparative Study PT - Journal Article PL - Netherlands TA - Eur J Pharmacol JT - European journal of pharmacology JID - 1254354 RN - 0 (Hallucinogens) RN - 0 (Narcotic Antagonists) RN - 36B82AMQ7N (Naloxone) RN - KE1SEN21RM (N-Methyl-3,4-methylenedioxyamphetamine) SB - IM MH - Analysis of Variance MH - Animals MH - Behavior, Animal/*drug effects MH - Dose-Response Relationship, Drug MH - Hallucinogens/*pharmacology MH - Male MH - Motor Activity/drug effects MH - N-Methyl-3,4-methylenedioxyamphetamine/*pharmacology MH - Naloxone/*pharmacology MH - Narcotic Antagonists/pharmacology MH - Rats MH - Rats, Sprague-Dawley MH - Time Factors EDAT- 2005/05/19 09:00 MHDA- 2005/08/30 09:00 CRDT- 2005/05/19 09:00 PHST- 2005/02/14 00:00 [received] PHST- 2005/04/13 00:00 [revised] PHST- 2005/04/14 00:00 [accepted] PHST- 2005/05/19 09:00 [pubmed] PHST- 2005/08/30 09:00 [medline] PHST- 2005/05/19 09:00 [entrez] AID - S0014-2999(05)00434-6 [pii] AID - 10.1016/j.ejphar.2005.04.020 [doi] PST - ppublish SO - Eur J Pharmacol. 2005 May 23;516(1):34-9. doi: 10.1016/j.ejphar.2005.04.020.