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- W2959799072 abstract "Abstract Background The current opioid crisis has reinvigorated preclinical research in the evaluation of non-opioid candidate treatments for opioid use disorder (OUD). Emerging evidence suggests 5-HT 2C receptor agonists may attenuate the abuse-related effects of opioids. This study evaluated effectiveness of 7-day treatment with the clinically available 5-HT 2C agonist lorcaserin on heroin-vs.-food choice in rhesus monkeys. Lorcaserin effects were compared to effects produced by saline substitution and by 7-day treatment with the opioid antagonist naltrexone. Methods Adult male (1) and female (6) rhesus monkeys were trained to respond under a concurrent schedule of food delivery (1g pellets, fixed-ratio 100 schedule) and intravenous heroin injections (0-0.032 mg/kg/injection, fixed-ratio 10 schedule) during daily 2h sessions. Heroin choice dose-effect functions were determined daily before and following 7-day saline substitution or 7-day continuous treatment with naltrexone (0.0032-0.032 mg/kg/h, IV) or lorcaserin (0.032-0.32 mg/kg/h, IV). Results Under baseline conditions, increasing heroin doses maintained a dose-dependent increase in heroin choice. Both saline substitution and 7-day naltrexone treatment significantly attenuated heroin choice and produced a reciprocal increase in food choice. Continuous lorcaserin treatment significantly increased heroin choice. Conclusions In contrast to saline substitution and naltrexone, lorcaserin treatment was ineffective to reduce heroin-vs.-food choice. These preclinical results do not support the therapeutic potential of lorcaserin as a candidate OUD treatment." @default.
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- W2959799072 date "2019-07-16" @default.
- W2959799072 modified "2023-09-24" @default.
- W2959799072 title "Lorcaserin maintenance fails to attenuate heroin vs. food choice in rhesus monkeys" @default.
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- W2959799072 doi "https://doi.org/10.1101/705020" @default.
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