Discovery of a Potent Kelch-Like ECH-Associated Protein 1-Nuclear Factor Erythroid 2-Related Factor 2 (Keap1–Nrf2) Protein–Protein Interaction Inhibitor with Natural Proline Structure as a Cytoprotective Agent against Acetaminophen-Induced Hepatotoxicity
作者:Meng-Chen Lu、Xian Zhang、Feng Wu、Shi-Jie Tan、Jing Zhao、Qi-Dong You、Zheng-Yu Jiang
DOI:10.1021/acs.jmedchem.9b00818
日期:2019.7.25
insults and threats. Directly disrupting Keap1-Nrf2 protein-protein interactions has been regarded as a promising way to activate Nrf2. We reported here the first identification of amino acids as preferred substituents to design potent Keap1-Nrf2 inhibitors. Comprehensive structure-activity analysis identified Pro as a preferred substituent, obtaining a potent inhibitor 35 with an IC50 of 43 nM in the competitive
转录因子Nrf2是细胞保护系统的关键调节剂,增强Nrf2活性可以保护细胞免受各种侵害和威胁。直接破坏Keap1-Nrf2蛋白质-蛋白质相互作用已被视为激活Nrf2的一种有前途的方法。我们在这里报告了氨基酸的首次鉴定,这些氨基酸是设计有效的Keap1-Nrf2抑制剂的优选取代基。全面的结构活性分析确定Pro为首选取代基,在竞争荧光极化(FP)分析中获得了有效抑制剂35,IC50为43 nM,在等温滴定量热(ITC)中,Keap1蛋白的Kd值为53.7 nM。分析。Pro类似物35在体外和细胞中均表现出紧密而持久的Keap1结合,在细胞和体内模型中用35种激活的Nrf2调节的细胞保护反应和拮抗对乙酰氨基酚引起的肝损伤进行治疗。这项工作不仅为进一步探索Keap1-Nrf2抑制的治疗潜力提供了有用的工具,而且丰富了适合Keap1-Nrf2界面的化学结构的多样性。