Discovery of new ATP-competitive inhibitors of human DNA topoisomerase IIα through screening of bacterial topoisomerase inhibitors
作者:Žiga Skok、Martina Durcik、Darja Gramec Skledar、Michaela Barančoková、Lucija Peterlin Mašič、Tihomir Tomašič、Anamarija Zega、Danijel Kikelj、Nace Zidar、Janez Ilaš
DOI:10.1016/j.bioorg.2020.104049
日期:2020.9
Human DNA topoisomerase II is one of the major targets in anticancer therapy, however ATP-competitive inhibitors of this target have not yet reached their full potential. ATPase domain of human DNA topoisomerase II belongs to the GHKL ATPase superfamily and shares a very high 3D structural similarity with other superfamily members, including bacterial topoisomerases. In this work we report the discovery
人类DNA拓扑异构酶II是抗癌治疗的主要靶标之一,但是该靶标的ATP竞争性抑制剂尚未发挥其全部潜力。人类DNA拓扑异构酶II的ATPase域属于GHKL ATPase超家族,与包括细菌拓扑异构酶在内的其他超家族成员具有非常高的3D结构相似性。在这项工作中,我们报告了通过筛选细菌DNA促旋酶和拓扑异构酶IV的ATP竞争性抑制剂的内部文库而发现的人类DNA拓扑异构酶IIα的ATP竞争性抑制剂的新化学型。系统筛选该文库为我们提供了20种热门化合物。选择了1,2,4-取代的N-苯基吡咯酰胺进行进一步的研究,结果得到了13种新的类似物,包括52在松弛试验(IC 50 = 3.2 µM)和ATPase分析(IC 50 = 0.43 µM)中具有强活性。在MCF-7癌细胞系中测定了所有命中的细胞毒活性,最有效的化合物16和20的IC 50值分别为8.7和8.2 µM。