Discovery of novel Thieno[2,3-d]imidazole derivatives as agonists of human STING for antitumor immunotherapy using systemic administration
作者:Jing Niu、Hudagula Bai、Zizhou Li、Yuzhe Gao、Yan Zhang、Xiyuan Wang、Yaxi Yang、Yungen Xu、Meiyu Geng、Zuoquan Xie、Bing Zhou
DOI:10.1016/j.ejmech.2022.114482
日期:2022.8
scaffold hopping strategy, we designed a series of thieno [2,3-d]imidazole derivatives as novel STING agonists. Further structure-activity relationship study and optimization led to the discovery of compound 45 as a highly potent human STING agonist with an EC50 value of 1.2 nM. Compound 45 was found to bind to multiple human STING isoforms and accordingly activated the downstream TBK1/IRF3 and NF-κB signaling
干扰素基因刺激物(STING)信号通路的激活在先天免疫反应中起重要作用。尽管最近开发了几种 STING 激动剂,但大多数临床 CDN STING 激动剂是通过瘤内 (IT) 注射给药的。因此,仍然需要开发多种全身给药的非 CDN 小分子 STING 激动剂。在此,通过使用支架跳跃策略,我们设计了一系列噻吩并 [2,3-d] 咪唑衍生物作为新型 STING 激动剂。进一步的构效关系研究和优化导致发现化合物45是一种高效的人类 STING 激动剂,EC 50值为 1.2 nM。化合物45发现与多种人类 STING 同种型结合,并因此激活带有不同 STING 同种型的报告细胞中的下游 TBK1/IRF3 和 NF-κB 信号通路。STING敲除细胞中STING信号通路的激活被消除,表明它是一种特异性的STING激动剂。化合物45通过全身给药显着抑制同种异体移植物 4T1 和 CT26 肿瘤模型中的肿瘤生长,更显着的是,45能够在