<sup>18</sup>F-Labeled 1,4-Dioxa-8-azaspiro[4.5]decane Derivative: Synthesis and Biological Evaluation of a σ<sub>1</sub> Receptor Radioligand with Low Lipophilicity as Potent Tumor Imaging Agent
作者:Fang Xie、Ralf Bergmann、Torsten Kniess、Winnie Deuther-Conrad、Constantin Mamat、Christin Neuber、Boli Liu、Jörg Steinbach、Peter Brust、Jens Pietzsch、Hongmei Jia
DOI:10.1021/acs.jmedchem.5b00593
日期:2015.7.23
We report the syntheses and evaluation of series of novel piperidine compounds with low lipophilicity as σ1 receptor ligands. 8-(4-(2-Fluoroethoxy)benzyl)-1,4-dioxa-8-azaspiro[4.5]decane (5a) possessed high affinity (Ki = 5.4 ± 0.4 nM) for σ1 receptors and selectivity for σ2 receptors (30-fold) and the vesicular acetylcholine transporter (1404-fold). [18F]5a was prepared using a one-pot, two-step labeling
我们报告低亲脂性系列新颖的哌啶化合物作为σ的合成和评价1受体配体。8-(4-(2-氟乙氧基)苄基)-1,4-二氧杂-8-氮杂螺[4.5]癸烷(5A)具有高亲和力(ķ我= 5.4±0.4纳米)为σ 1个受体和选择性σ 2受体(30倍)和水泡乙酰胆碱转运蛋白(1404倍)。[ 18 F] 5a是在自动合成模块中使用一锅,两步标记程序制备的,放射化学纯度> 95%,比活度为25-45 GBq /μmol。细胞结合,生物分布和放射自显影与阻断实验表明[18 F]图5a到σ 1种受体在体外和体内。使用小鼠肿瘤异种移植模型的小动物正电子发射断层扫描(PET)成像显示在人类癌和黑色素瘤中高积累。氟哌啶醇的治疗显着减少了放射性示踪剂在肿瘤中的积累。这些结果表明与合适的亲脂性和适当的亲合力放射性示踪剂为σ 1个受体可用于肿瘤成像。