99mTc-labeled dibenzylideneacetone derivatives as potential SPECT probes for in vivo imaging of β-amyloid plaque
作者:Yanping Yang、Mengchao Cui、Bing Jin、Xuedan Wang、Zijing Li、Pingrong Yu、Jianhua Jia、Hualong Fu、Hongmei Jia、Boli Liu
DOI:10.1016/j.ejmech.2013.03.057
日期:2013.6
Four Tc-99m-labeled dibenzylideneacetone derivatives and corresponding rhenium complexes were successfully synthesized and biologically evaluated as potential imaging probes for A beta plaques using SPECT. All rhenium complexes (5a-d) showed affinity for A beta((1-42)) aggregates (K-i = 13.6-120.9 nM), and selectively stained the A beta plaques on brain sections of transgenic mice. Biodistribution in normal mice revealed that [Tc-99m]5a-d exhibited moderate initial uptake (0.31%-0.49% ID/g at 2 min) and reasonable brain washout at 60 min post-injection. Although additional optimizations are still needed to facilitate it's penetration through BBB, the present results indicate that [Tc-99m]5a may be a potential SPECT probe for imaging A beta plaques in Alzheimer's brains. (C) 2013 Elsevier Masson SAS. All rights reserved.