<sup>18</sup>F-Labeled PET Probe Targeting Enhancer of Zeste Homologue 2 (EZH2) for Cancer Imaging
作者:Lihai Yu、Nikola Despotovic、Michael S. Kovacs、Christopher L. Pin、Leonard G. Luyt
DOI:10.1021/acsmedchemlett.8b00613
日期:2019.3.14
enhancer of zeste homologue 2 (EZH2) plays a catalytic role in histone methylation (H3K27me3), one of the epigenetic modifications that is dysregulated in cancer. The development of a positron emission tomography (PET) imaging agent targeting EZH2 has the potential to provide a method of stratifying patients for epigenetic therapies. In this study, we designed and synthesized a series of fluoroethyl analogs
Zeste同系物2(EZH2)的酶增强剂在组蛋白甲基化(H3K27me3)中起催化作用,组蛋白甲基化是在癌症中失调的表观遗传修饰之一。靶向EZH2的正电子发射断层扫描(PET)成像剂的开发具有提供对患者进行表观遗传疗法分层的方法的潜力。在这项研究中,我们基于EZH2抑制剂UNC1999和EPZ6438的结构设计并合成了一系列氟乙基类似物。在候选化合物中,通过SAM竞争分析法,20b对EZH2(IC 50 = 6 nM)具有高选择性,而对EZH1(IC 50 = 200 nM)具有选择性,此外,在胰腺癌细胞系PANC中也显示出对EZH2的抑制作用-1(IC 50= 9.8 nM)。[ 18 F] 20b已成功合成,在PANC-1细胞中的摄取比在MCF-7细胞中高5倍。在PANC-1细胞异种移植小鼠模型中的MicroPET成像表明[ 18 F] 20b与EZH2具有特异性结合,这是通过对肿瘤组