作者:Yang Yang、Xin-Hong Duan、Jun-Yuan Deng、Bing Jin、Hong-Mei Jia、Bo-Li Liu
DOI:10.1016/j.bmcl.2011.06.077
日期:2011.9
We report the synthesis and evaluation of a series of N-benzoylindole derivatives as novel potential imaging agents for beta-amyloid plaques. In vitro binding studies using A beta(1-40) aggregates versus [I-125]TZDM showed that all these derivatives demonstrated high binding affinities (K-i values ranged from 8.4 to 121.6 nM). Moreover, two radioiodinated compounds [I-125]7 and [I-125]14 were prepared. Autoradiography for [I-125]14 displayed intense and specific labeling of A beta plaques in the brain sections of AD model mice (C57, APP/PS1) with low background. In vivo biodistribution in normal mice exhibited sufficient initial brain uptake for imaging (2.19% and 2.00% ID/g at 2 min postinjection for [I-125]7 and [I-125]14, respectively). Although additional modifications are necessary to improve brain uptake and clearance from the brain, the N-benzoylindole may be served as a backbone structure to develop novel beta-amyloid imaging probes. (C) 2011 Elsevier Ltd. All rights reserved.