(±)-2-(N-tert-Butylamino)-3′-[125I]-iodo-4′-azidopropiophenone: A dopamine transporter and nicotinic acetylcholine receptor photoaffinity ligand based on bupropion (Wellbutrin, Zyban)
作者:David J. Lapinsky、Shaili Aggarwal、Tammy L. Nolan、Christopher K. Surratt、John R. Lever、Rejwi Acharya、Roxanne A. Vaughan、Akash Pandhare、Michael P. Blanton
DOI:10.1016/j.bmcl.2011.10.086
日期:2012.1
Towards addressing the knowledge gap of how bupropion interacts with the dopamine transporter (DAT) and nicotinic acetylcholine receptors (nAChRs), a ligand was synthesized in which the chlorine of bupropion was isosterically replaced with an iodine and a photoreactive azide was added to the 4'-position of the aromatic ring. Analog (+/-)-3 (SADU-3-72) demonstrated modest DAT and alpha 4 beta 2 nAChR affinity. A radioiodinated version was shown to bind covalently to hDAT expressed in cultured cells and affinity-purified, lipid-reincorporated human alpha 4 beta 2 neuronal nAChRs. Co-incubation of (+/-)-[I-125]-3 with non-radioactive (+/-)-bupropion or (-)-cocaine blocked labeling of these proteins. Compound (+/-)-[I-125]-3 represents the first successful example of a DAT and nAChR photoaffinity ligand based on the bupropion scaffold. Such ligands are expected to assist in mapping bupropion-binding pockets within plasma membrane monoamine transporters and ligand-gated nAChR ion channels. (C) 2011 Elsevier Ltd. All rights reserved.