PMID- 33909067 OWN - NLM STAT- MEDLINE DCOM- 20220131 LR - 20221207 IS - 1469-5111 (Electronic) IS - 1461-1457 (Print) IS - 1461-1457 (Linking) VI - 24 IP - 8 DP - 2021 Aug 20 TI - Discriminative-Stimulus Effects of Synthetic Cathinones in Squirrel Monkeys. PG - 656-665 LID - 10.1093/ijnp/pyab017 [doi] AB - BACKGROUND: Synthetic cathinones display overlapping behavioral effects with psychostimulants (e.g., methamphetamine [MA]) and/or entactogens (e.g., 3,4-methylenedioxymethaphetamine [MDMA])-presumably reflecting their dopaminergic and/or serotonergic activity. The discriminative stimulus effects of MDMA thought to be mediated by such activity have been well characterized in rodents but have not been fully examined in nonhuman primates. METHODS: The present studies were conducted to systematically evaluate the discriminative stimulus effects of 5 abused synthetic cathinones (methylenedioxypyrovalerone [MDPV], alpha-pyrrolidinovalerophenone [alpha-PVP], methcathinone [MCAT], mephedrone, and methylone) in adult male squirrel monkeys trained to distinguish intramuscular injections of MA (0.1 mg/kg; n = 4) or MDMA (0.6 mg/kg; n = 4) from vehicle. RESULTS: Each training drug produced dose-dependent effects and, at the highest dose, full substitution. MDMA produced predominantly vehicle-like responding in the MA-trained group, whereas the highest dose of MA (0.56 mg/kg) produced partial substitution (approximately 90% appropriate lever responding in one-half of the subjects) in the MDMA-trained group. MDPV, alpha-PVP, and MCAT produced full substitution in MA-trained subjects, but, at the same or higher doses, only substituted for MDMA in one-half of the subjects, consistent with primarily dopaminergically mediated interoceptive effects. In contrast, mephedrone and methylone fully substituted in MDMA-trained subjects but failed to fully substitute for the training drug in MA-trained subjects, suggesting a primary role for serotonergic actions in their interoceptive effects. CONCLUSIONS: These findings suggest that differences in the interoceptive effects of synthetic cathinones in nonhuman primates reflect differing compositions of monoaminergic actions that also may mediate their subjective effects in humans. CI - (c) The Author(s) 2021. Published by Oxford University Press on behalf of CINP. FAU - Wakeford, Alison G P AU - Wakeford AGP AD - McLean Hospital, Behavioral Biology Program, Belmont, Massachusetts, USA. AD - Harvard Medical School, Department of Psychiatry, Boston, Massachusetts, USA. FAU - Sherwood, Alexander M AU - Sherwood AM AD - College of Pharmacy, University of Kentucky, Lexington, Kentucky, USA. AD - Usona Institute, Madison, Wisconsin, USA. FAU - Prisinzano, Thomas E AU - Prisinzano TE AD - College of Pharmacy, University of Kentucky, Lexington, Kentucky, USA. FAU - Bergman, Jack AU - Bergman J AD - McLean Hospital, Behavioral Biology Program, Belmont, Massachusetts, USA. AD - Harvard Medical School, Department of Psychiatry, Boston, Massachusetts, USA. FAU - Kohut, Stephen J AU - Kohut SJ AD - McLean Hospital, Behavioral Biology Program, Belmont, Massachusetts, USA. AD - Harvard Medical School, Department of Psychiatry, Boston, Massachusetts, USA. FAU - Paronis, Carol A AU - Paronis CA AD - McLean Hospital, Behavioral Biology Program, Belmont, Massachusetts, USA. AD - Harvard Medical School, Department of Psychiatry, Boston, Massachusetts, USA. LA - eng GR - R01 DA043700/DA/NIDA NIH HHS/United States GR - P20 GM113117/GM/NIGMS NIH HHS/United States GR - R01 DA048150/DA/NIDA NIH HHS/United States GR - R01 DA002519/DA/NIDA NIH HHS/United States GR - K01 DA039306/DA/NIDA NIH HHS/United States GR - R24 GM111385/GM/NIGMS NIH HHS/United States PT - Journal Article PT - Research Support, N.I.H., Extramural PL - England TA - Int J Neuropsychopharmacol JT - The international journal of neuropsychopharmacology JID - 9815893 RN - 0 (Alkaloids) RN - 0 (Benzodioxoles) RN - 0 (Central Nervous System Stimulants) RN - 0 (Propiophenones) RN - 0 (Psychotropic Drugs) RN - 0 (Pyrrolidines) RN - 0 (alpha-pyrrolidinovalerophenone) RN - 386QA522QG (monomethylpropion) RN - 44RAL3456C (Methamphetamine) RN - 540EI4406J (cathinone) RN - 8BA8T27317 (mephedrone) RN - KE1SEN21RM (N-Methyl-3,4-methylenedioxyamphetamine) RN - L4I4B1R01F (methylone) RN - 0 (Synthetic Cathinone) SB - IM MH - Alkaloids/administration & dosage/*pharmacology MH - Animals MH - Behavior, Animal/drug effects MH - Benzodioxoles/pharmacology MH - Central Nervous System Stimulants/administration & dosage/*pharmacology MH - Discrimination Learning/*drug effects MH - Interoception/*drug effects MH - Male MH - Methamphetamine/administration & dosage/analogs & derivatives/*pharmacology MH - N-Methyl-3,4-methylenedioxyamphetamine/administration & dosage/*pharmacology MH - Propiophenones/pharmacology MH - Psychotropic Drugs/administration & dosage/*pharmacology MH - Pyrrolidines/pharmacology MH - Saimiri MH - Synthetic Cathinone PMC - PMC8378080 OTO - NOTNLM OT - MDMA OT - Methamphetamine OT - drug-discrimination OT - monkeys EDAT- 2021/04/29 06:00 MHDA- 2022/02/01 06:00 PMCR- 2021/04/28 CRDT- 2021/04/28 12:21 PHST- 2020/10/27 00:00 [received] PHST- 2021/04/06 00:00 [revised] PHST- 2021/04/26 00:00 [accepted] PHST- 2021/04/29 06:00 [pubmed] PHST- 2022/02/01 06:00 [medline] PHST- 2021/04/28 12:21 [entrez] PHST- 2021/04/28 00:00 [pmc-release] AID - 6257213 [pii] AID - pyab017 [pii] AID - 10.1093/ijnp/pyab017 [doi] PST - ppublish SO - Int J Neuropsychopharmacol. 2021 Aug 20;24(8):656-665. doi: 10.1093/ijnp/pyab017.