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Journal Article
Research Support, N.I.H., Extramural
Research Support, N.I.H., Intramural
Deconstructed Analogues of Bupropion Reveal Structural Requirements for Transporter Inhibition versus Substrate-Induced Neurotransmitter Release.
ACS Chemical Neuroscience 2017 June 22
Bupropion (1), an α-aminophenone uptake inhibitor at plasma membrane transporters for dopamine (DAT) and norepinephrine (NET), is a widely prescribed antidepressant and smoking cessation aid. Cathinone (2), a structurally simpler α-aminophenone, is a substrate-type releasing agent at the same transporters and a recognized drug of abuse. Our goal was to identify the structural features of α-aminophenones that govern the mechanistic transition from uptake inhibition to substrate-induced release. Deconstructed analogues of 1 were synthesized and compared for their ability to interact with DAT, NET, and the serotonin transporter (SERT) using in vitro assay methods. Bulky amine substituents resulted in compounds that function as DAT uptake inhibitors but not release agents, whereas smaller amine substituents result in relatively nonselective releasing agents at DAT and NET. Our findings add to empirical evidence supporting distinct molecular determinants for α-aminophenone- (i.e., cathinone-) related agents acting as transporter inhibitors versus those acting as releasers.
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