Discovery of novel 7,8-dihydropteridine-6(5H)-one-based DNA-PK inhibitors as potential anticancer agents via scaffold hopping strategy
作者:Zongbao Ding、Wei Pan、Yao Xiao、Binbin Cheng、Gang Huang、Jianjun Chen
DOI:10.1016/j.ejmech.2022.114401
日期:2022.7
AZD-7648 (IC50 = 1.58 nM). Mode of action studies revealed that compound DK1 decreased the expression levels of γH2A.X and demonstrated synergistic antiproliferative activity against a series of cancer cell lines when used in combination with doxorubicin. Moreover, DK1 showed reasonable in vitro drug-like properties and favorable in vivo pharmacokinetics as an oral drug candidate. Importantly, the
DNA 依赖性蛋白激酶 (DNA-PK) 是 DNA 损伤反应 (DDR) 通路中的重要元素,被认为是抗肿瘤药物的可药用靶标。从AZD-7648(一种正在研究用于晚期癌症治疗的 II 期临床试验的强效 DNA-PK 抑制剂)开始,通过支架跳跃策略合理设计了两个系列的 DNA-PK 抑制剂,合成并评估了它们的生物活性。大多数化合物在 DNA-PK 酶测定中表现出有效的生化活性,IC 50值低于 300 nM。在这些化合物中,DK1表现出最好的 DNA-PK 抑制效力 (IC 50 = 0.8 nM),略好于AZD-7648 (IC 50 = 1.58 纳米)。作用模式研究表明,当与多柔比星联合使用时,化合物DK1可降低 γH2A.X 的表达水平,并显示出对一系列癌细胞系的协同抗增殖活性。此外,作为口服候选药物, DK1显示出合理的体外药物样特性和良好的体内药代动力学。重要的是,DK1与 DNA