PMID- 22664136 OWN - NLM STAT- MEDLINE DCOM- 20130408 LR - 20221207 IS - 1879-0046 (Electronic) IS - 0376-8716 (Print) IS - 0376-8716 (Linking) VI - 126 IP - 1-2 DP - 2012 Nov 1 TI - Contrasting effects of d-methamphetamine, 3,4-methylenedioxymethamphetamine, 3,4-methylenedioxypyrovalerone, and 4-methylmethcathinone on wheel activity in rats. PG - 168-75 LID - S0376-8716(12)00174-3 [pii] LID - 10.1016/j.drugalcdep.2012.05.011 [doi] AB - BACKGROUND: Reports from U.S., U.K. and European drug policy entities, and ongoing media accounts, show increasing recreational use of 4-methylmethcathinone (4-MMC, mephedrone) and 3,4-methylenedioxypyrovalerone (MDPV). Severe sympathomimetic symptoms, hallucinations, psychoses, and even deaths have been reported, yet little scientific information is available on the effects of these compounds in laboratory models. Available studies on the neurochemistry of these drugs show that 4-MMC and MDPV enhance DA neurotransmission, while 4-MMC additionally enhances 5-HT neurotransmission--a pattern much like that reported for methamphetamine versus 3,4-methylenedioxymethamphetamine (MDMA). As is the case for designer amphetamines, these neurochemical distinctions may predict differential potential for repetitive versus episodic abuse and distinct lasting toxicities. METHODS: This study determined relative locomotor stimulant effects of 4-MMC (1-10 mg/kg, s.c.) and MDPV (0.5-5.6 mg/kg, s.c.), in comparison with d-methamphetamine (MA; 0.5-5.6 mg/kg, s.c.) and MDMA (1-7.5 mg/kg, s.c.) on a measure of locomotor activity--voluntary wheel running--in male Wistar rats (N=8). RESULTS: Compared to counts of wheel rotations after saline, a biphasic change in the pattern of counts was observed after injections of MA and MDPV, with relatively higher counts following lower doses and lower counts following the highest dose. However, monophasic, dose-dependent reductions in counts were observed in response to injections of MDMA and 4-MMC. CONCLUSION: Thus, voluntary wheel running yielded the same categorical distinctions for these drugs as did prior experiments testing the effects of these drugs on monoaminergic neurotransmission. These data indicate that MDPV produces prototypical locomotor stimulant effects whereas 4-MMC is more similar to the entactogen MDMA. CI - Copyright (c) 2012 Elsevier Ireland Ltd. All rights reserved. FAU - Huang, Pai-Kai AU - Huang PK AD - Committee on the Neurobiology of Addictive Disorders, The Scripps Research Institute, CA 92037, USA. FAU - Aarde, Shawn M AU - Aarde SM FAU - Angrish, Deepshikha AU - Angrish D FAU - Houseknecht, Karen L AU - Houseknecht KL FAU - Dickerson, Tobin J AU - Dickerson TJ FAU - Taffe, Michael A AU - Taffe MA LA - eng GR - DA024705/DA/NIDA NIH HHS/United States GR - R01 DA024705/DA/NIDA NIH HHS/United States GR - R01 DA024105/DA/NIDA NIH HHS/United States GR - R01 DA018418/DA/NIDA NIH HHS/United States GR - DA024105/DA/NIDA NIH HHS/United States GR - DA018418/DA/NIDA NIH HHS/United States PT - Comparative Study PT - Journal Article PT - Research Support, N.I.H., Extramural DEP - 20120603 PL - Ireland TA - Drug Alcohol Depend JT - Drug and alcohol dependence JID - 7513587 RN - 0 (Benzodioxoles) RN - 0 (Central Nervous System Stimulants) RN - 0 (Designer Drugs) RN - 0 (Hallucinogens) RN - 0 (Pyrrolidines) RN - 44RAL3456C (Methamphetamine) RN - 8BA8T27317 (mephedrone) RN - KE1SEN21RM (N-Methyl-3,4-methylenedioxyamphetamine) RN - TZ47U051FI (Dextroamphetamine) RN - 0 (Synthetic Cathinone) SB - IM MH - Animals MH - Benzodioxoles/*pharmacology MH - Central Nervous System Stimulants/*pharmacology MH - Data Interpretation, Statistical MH - Designer Drugs/*pharmacology MH - Dextroamphetamine/*pharmacology MH - Dose-Response Relationship, Drug MH - Hallucinogens/*pharmacology MH - Male MH - Methamphetamine/*analogs & derivatives/pharmacology MH - Motor Activity/*drug effects MH - N-Methyl-3,4-methylenedioxyamphetamine/*pharmacology MH - Pyrrolidines/*pharmacology MH - Rats MH - Rats, Wistar MH - Stimulation, Chemical MH - Synthetic Cathinone PMC - PMC3439532 MID - NIHMS378818 EDAT- 2012/06/06 06:00 MHDA- 2013/04/09 06:00 PMCR- 2013/11/01 CRDT- 2012/06/06 06:00 PHST- 2012/03/14 00:00 [received] PHST- 2012/05/10 00:00 [revised] PHST- 2012/05/11 00:00 [accepted] PHST- 2012/06/06 06:00 [entrez] PHST- 2012/06/06 06:00 [pubmed] PHST- 2013/04/09 06:00 [medline] PHST- 2013/11/01 00:00 [pmc-release] AID - S0376-8716(12)00174-3 [pii] AID - 10.1016/j.drugalcdep.2012.05.011 [doi] PST - ppublish SO - Drug Alcohol Depend. 2012 Nov 1;126(1-2):168-75. doi: 10.1016/j.drugalcdep.2012.05.011. Epub 2012 Jun 3.