Synthesis and biological evaluation of 18F labeled fluoro-oligo-ethoxylated 4-benzylpiperazine derivatives for sigma-1 receptor imaging
作者:Xia Wang、Yan Li、Winnie Deuther-Conrad、Fang Xie、Xin Chen、Meng-Chao Cui、Xiao-Jun Zhang、Jin-Ming Zhang、Jörg Steinbach、Peter Brust、Bo-Li Liu、Hong-Mei Jia
DOI:10.1016/j.bmc.2012.10.038
日期:2013.1
evaluation of a series of fluoro-oligo-ethoxylated 4-benzylpiperazine derivatives as potential σ1 receptor ligands. In vitro competition binding assays showed that 1-(1,3-benzodioxol-5-ylmethyl)-4-(4-(2-fluoroethoxy)benzyl)piperazine (6) exhibits low nanomolar affinity for σ1 receptors (Ki = 1.85 ± 1.59 nM) and high subtype selectivity (σ2 receptor: Ki = 291 ± 111 nM; Kiσ2/Kiσ1 = 157). [18F]6 was prepared in
我们报告了一系列氟寡乙氧基化的4-苄基哌衍生物作为潜在的合成和评价σ 1受体配体。体外竞争结合测定表明,1-(1,3-苯并二氧戊环-5-基甲基)-4-(4-(2-氟乙氧基)苄基)哌嗪(6)表现出低纳摩尔亲和力σ 1受体(ķ我 = 1.85 ±1.59 1nM)和高亚型选择性(σ 2受体:ķ我 = 291±111纳米; ķ我σ 2 / ķ我σ 1 = 157)。[ 18楼] 6在30-50%的放射化学分离产率制备,具有> 99%的纯化后的HPLC分析放射化学纯度,通过亲核18 ˚F -相应的甲苯磺酸酯前体的取代。发现[ 18 F] 6的log D pH 7.4值为2.57±0.10,该值在预期可引起高大脑摄取的范围内。在小鼠中的生物分布研究表明在已知含有器官的放射性示踪剂的相对高浓度的σ 1种受体,包括脑,肺,肾,心脏,脾和。注射[ 18 F] 6前5分钟给予氟哌啶醇大大降低了上述器官中