Design, Synthesis, and <i>In Vitro</i> and <i>In Vivo</i> Evaluation of an <sup>18</sup>F-Labeled Sphingosine 1-Phosphate Receptor 1 (S1P<sub>1</sub>) PET Tracer
作者:Adam J. Rosenberg、Hui Liu、Hongjun Jin、Xuyi Yue、Sean Riley、Steven J. Brown、Zhude Tu
DOI:10.1021/acs.jmedchem.6b00390
日期:2016.7.14
identified as a therapeutic target for various diseases, a PET tracer for S1P1 would be a useful tool. Fourteen fluorine-containing analogues of S1P ligands were synthesized and their in vitro binding potency measured; four had high potency and selectivity for S1P1 (S1P1 IC50 < 10 nM, >100-fold selectivity for S1P1 over S1P2 and S1P3). The most potent ligand, 28c (IC50 = 2.63 nM for S1P1) was 18F-labeled and
1-磷酸鞘氨醇受体 1 (S1P 1 ) 在炎症反应中发挥着关键的信号传导作用;由于 S1P 1调节已被确定为多种疾病的治疗靶点,因此 S1P 1的 PET 示踪剂将是一种有用的工具。合成了14种S1P配体的含氟类似物并测量了它们的体外结合效力;四种对 S1P 1具有高效力和选择性(S1P 1 IC 50 < 10 nM,对 S1P 1的选择性是 S1P 2和 S1P 3的 >100 倍)。最有效的配体28c (S1P 1的IC 50 = 2.63 nM)被18 F标记并在LPS诱导的急性肝损伤的小鼠模型中进行评估以确定其S1P 1结合特异性。生物分布、放射自显影和 microPET 成像结果显示,LPS 治疗小鼠肝脏中的 [ 18 F] 28c积累量高于对照组。通过免疫组织化学分析 (IHC) 证实了 LPS 模型中 S1P 1表达的增加。这些数据表明[ 18 F] 28c是一种S1P 1