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Designer Drug, 25D-NBOMe, Has Reinforcing and Rewarding Effects through Change of a Dopaminergic Neurochemical System.

Jae-Gyeong Lee, Kwang-Hyun Hur, Su-Bin Hwang, Sooyeun Lee, Seok-Yong Lee, Choon-Gon Jang

ACS Chemical Neuroscience August 2, 2023 DOI: 10.1021/acschemneuro.3c00196 (opens in new tab)

Study at a glance

AI-extracted from the abstract
Characteristics Preclinical animal study Peer reviewed
Population Rats and mice
Intervention 25D-NBOMe
Dose 0.03 mg/kg (IVSA); 1 mg/kg (CPP); 1, 3, and 10 mg/kg (microdialysis)
Topics Addiction
Keywords 25d-nbome Cpp Dopamine Self-administration
Key points 25D-NBOMe produced rewarding and reinforcing effects, with increased intravenous self-administration in rats at 0.03 mg/kg and conditioned place preference in mice at 1 mg/kg, alongside altered dopamine-related protein expression and elevated extracellular dopamine and metabolites in the nucleus accumbens. The authors conclude the compound has abuse potential.

Abstract

2-(2,5-Dimethoxy-4-methylphenyl)-N-(2-methoxybenzyl)_ethanamine (25D-NBOMe), an analogue of the 2C family, is a newly synthesized psychoactive substance. It acts as an agonist at the 5-HT2A receptor and has a similar mechanism to that of NBOMe compounds. However, the pharmacological mechanism for its rewarding and reinforcing effects has not been revealed. In the present study, intravenous self-administration (IVSA) test and conditioned place preference (CPP) test were performed to investigate whether 25D-NBOMe has abuse potential. We also evaluated the effects of 25D-NBOMe on neurochemical changes using western blot analysis and microdialysis. The IVSA test revealed increased self-administration in 25D-NBOMe (0.03 mg/kg)-treated rats. In addition, the CPP test revealed rewarding effects in 25D-NBOMe (1 mg/kg)-treated mice. In the neurochemical studies, 25D-NBOMe treatment affected the expression of dopamine (DA) receptor D1 (DRD1), DA receptor D2 (DRD2), tyrosine hydroxylase, DA transporter (DAT), and phospho-DAT (p-DAT) in the nucleus accumbens (NAc). In addition, microdialysis revealed that treatment with progressively increasing doses (1, 3, and 10 mg/kg) of 25D-NBOMe increased the extracellular levels of DA, 3,4-dihydroxyphenylacetic acid, and homovanillic acid in the rat NAc. Taken together, our results show the abuse potential and neurochemical changes related to addictive behavior after administration of 25D-NBOMe.

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