Abstract
Synthetic cathinones are derivatives of the naturally occurring compound cathinone, the main psychoactive ingredient in the khat plant Catha edulis. Cathinone is the β-keto analog of amphetamine, and all synthetic cathinones display a β-keto moiety in their structure. Several synthetic cathinones are widely prescribed medications (e.g., bupropion, Wellbutrin®), while others are problematic drugs of abuse (e.g., 4-methylmethcathinone, mephedrone). Similar to amphetamines, synthetic cathinones are psychomotor stimulants that exert their effects by impairing the normal function of plasma membrane transporters for dopamine (DAT), norepinephrine (NET), and 5-HT (SERT). Ring-substituted cathinones like mephedrone are transporter substrates that evoke neurotransmitter release by reversing the normal direction of transporter flux (i.e., releasers), whereas pyrrolidine-containing cathinones like 3,4-methylenedioxypyrovalerone (MDPV) are potent transporter inhibitors that block neurotransmitter uptake (i.e., blockers). Regardless of molecular mechanism, all synthetic cathinones increase extracellular monoamine concentrations in the brain, thereby enhancing cell-to-cell monoamine signaling. Here, we briefly review the mechanisms of action, structure-activity relationships, and in vivo pharmacology of synthetic cathinones. Overall, the findings show that certain synthetic cathinones are powerful drugs of abuse that could pose significant risk to users.
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Abbreviations
- 4-Bromo MCAT:
-
1-(4-Bromophenyl)-2-(methylamino)propan-1-one (brephedrone)
- 4-Chloro MCAT:
-
1-(4-Chlorophenyl)-2-(methylamino)propan-1-one (clephedrone)
- 4-Fluoro MCAT:
-
1-(4-Fluorophenyl)-2-(methylamino)propan-1-one (flephedrone)
- 4-Methyl MCAT (4-MMC):
-
2-(Methylamino)-1-(4-methylphenyl)propan-1-one (mephedrone)
- 4-Methoxy MCAT:
-
1-(4-Methoxyphenyl)-2-(methylamino)propan-1-one (methedrone)
- 4-TFM MCAT:
-
2-(Methylamino)-1-[4-(trifluoromethyl)phenyl]propan-1-one
- MCAT:
-
2-(Methylamino)-1-phenylpropan-1-one (methcathinone)
- MDMA:
-
1-(2H-1,3-Benzodioxol-5-yl)-N-methylpropan-2-amine
- MDMC:
-
1-(2H-1,3-Benzodioxol-5-yl)-2-(methylamino)propan-1-one (methylone)
- MDPV:
-
1-(2H-1,3-Benzodioxol-5-yl)-2-(pyrrolidin-1-yl)pentan-1-one
- α-PBP:
-
1-Phenyl-2-(pyrrolidin-1-yl)butan-1-one
- α-PHP:
-
1-Phenyl-2-(pyrrolidin-1-yl)hexan-1-one
- α-PPP:
-
1-Phenyl-2-(pyrrolidin-1-yl)propan-1-one
- α-PVP:
-
1-Phenyl-2-(pyrrolidin-1-yl)pentan-1-one
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The research program of Dr. Baumann is generously supported by the Intramural Research Program of the National Institute on Drug Abuse, National Institutes of Health, grant DA00523.
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Baumann, M.H., Walters, H.M., Niello, M., Sitte, H.H. (2018). Neuropharmacology of Synthetic Cathinones. In: Maurer, H., Brandt, S. (eds) New Psychoactive Substances . Handbook of Experimental Pharmacology, vol 252. Springer, Cham. https://doi.org/10.1007/164_2018_178
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