<sup>99m</sup>Tc-Cyclopentadienyl Tricarbonyl Chelate-Labeled Compounds as Selective Sigma-2 Receptor Ligands for Tumor Imaging
作者:Dan Li、Yuanyuan Chen、Xia Wang、Winnie Deuther-Conrad、Xin Chen、Bing Jia、Chengyan Dong、Jörg Steinbach、Peter Brust、Boli Liu、Hongmei Jia
DOI:10.1021/acs.jmedchem.5b01378
日期:2016.2.11
receptor affinity (Ki = 2.97 nM) and moderate subtype selectivity (10-fold). Moreover, it showed high selectivity toward vesicular acetylcholine transporter (2374-fold), dopamine D2L receptor, NMDA receptor, opiate receptor, dopamine transporter, norepinephrine transporter, and serotonin transporter. Its corresponding radiotracer [99mTc]20b showed high uptake in a time- and dose-dependent manner in DU145
我们设计并合成了含有5,6- dimethoxyisoindoline或6,7-二甲氧基-1,2,3,4-四氢异喹啉作为药效σ一系列环戊二烯基三羰基铼配合2受体配体。铼化合物20A具有低纳摩尔σ 2受体的亲和力(ķ我= 2.97 nM)的和中度的亚型选择性(10倍)。此外,它对水泡乙酰胆碱转运蛋白(2374倍),多巴胺D 2L受体,NMDA受体,阿片受体,多巴胺转运蛋白,去甲肾上腺素转运蛋白和5-羟色胺转运蛋白显示出很高的选择性。其相应的放射性示踪剂[ 99m Tc] 20b在DU145前列腺细胞和C6胶质瘤细胞中显示出高吸收,呈时间和剂量依赖性。此外,该示踪剂在裸鼠中显示出高的肿瘤吸收率(在240分钟时为5.92%ID / g)和高的肿瘤/血液和肿瘤/肌肉比率(在240分钟时分别为21和16)以及与σ受体的特异性结合带有C6胶质瘤异种移植物。C6胶质瘤异种移植模型中[ 99m Tc] 20b的小动物SPECT