Synthesis, radiolabeling and preliminary in vivo evaluation of [18F]FE-PE2I, a new probe for the dopamine transporter
作者:Magnus Schou、Carsten Steiger、Andrea Varrone、Denis Guilloteau、Christer Halldin
DOI:10.1016/j.bmcl.2009.06.032
日期:2009.8
A new dopamine transporter (DAT) ligand, (E)-N-(3-iodoprop-2-enyl)-2 beta-carbofluoroethoxy-3 beta-(4'-methyl- phenyl) nortropane (FE-PE2I, 6), derived from PE2I (1), was prepared and found to be a potent inhibitor of rodent DAT in vitro. Compound 6 was radiolabelled with fluorine-18 (t(1/2) = 109.8 min) for PET studies in monkeys. In vivo PET measurements showed a regional distribution in brain that corresponds to the known distribution of DAT. This binding was specific, reversible and the kinetics of [(18)F] 6 binding in brain were faster than for its lead compound, [(11)C]1. The possible presence of a hydroxy-methyl-radiometabolite formed by oxidation in the 3 beta-benzylic position of [(18)F]6 warrants further detailed evaluation of the metabolism of [(18)F]6. [(18)F]6 is a potential radioligand for imaging DATs in the human brain with PET. (C) 2009 Elsevier Ltd. All rights reserved.