Discovery, optimization and evaluation of isothiazolo[5,4-b]pyridine derivatives as RIPK1 inhibitors with potent in vivo anti-SIRS activity
作者:Yongjin Hao、Chengkui Yang、Chang Shu、Zhanhui Li、Kaijiang Xia、Shuwei Wu、Haikuo Ma、Sheng Tian、Yuting Ji、Jingjing Li、Sudan He、Xiaohu Zhang
DOI:10.1016/j.bioorg.2022.106051
日期:2022.12
Receptor-interacting protein kinase-1 (RIPK1) is involved in the necroptosis pathway, which regulates inflammatory signaling and cell death in a variety of diseases, including inflammatory and neurodegenerative disorders. We identified a novel hit compound 36 by a cell-based screening assay (anti-necroptosis EC50 = 58 nM). Starting from compound 36, we designed a series of scaffolds to improve anti-necroptosis
受体相互作用蛋白激酶 1 (RIPK1) 参与坏死性凋亡通路,该通路调节多种疾病(包括炎症和神经退行性疾病)中的炎症信号和细胞死亡。我们通过基于细胞的筛选试验(抗坏死性凋亡 EC 50 = 58 nM)鉴定了一种新的命中化合物36 。从化合物36开始,我们设计了一系列支架来提高抗坏死性凋亡活性、理化性质和代谢稳定性。异噻唑并 [5,4- b ] 吡啶主链被证明是一种很有前途的支架,它提供了许多有效的坏死性凋亡抑制剂。例如,化合物56可有效阻断人和小鼠细胞的坏死性凋亡 (EC 50 = 1–5 纳米)。结合测定显示化合物56有效结合 RIPK1 (K d = 13 nM),但不结合 RIPK3 (K d > 10,000 nM)。激酶功能测定 (ADP-Glo) 证实化合物56抑制 RIPK1 磷酸化,IC 50为 5.8 nM。重要的是,化合物56显示出出色的跨物种肝微粒体代谢稳定性(t1/2