Isoquinoline-1,3-diones as Selective Inhibitors of Tyrosyl DNA Phosphodiesterase II (TDP2)
作者:Jayakanth Kankanala、Christophe Marchand、Monica Abdelmalak、Hideki Aihara、Yves Pommier、Zhengqiang Wang
DOI:10.1021/acs.jmedchem.5b01973
日期:2016.3.24
isoquinoline-1,3-dione as a viable chemotype for selectively inhibiting TDP2. The initial hit compound 43 was identified by screening our in-house collection of synthetic compounds. Further structure–activity relationship (SAR) studies identified numerous analogues inhibiting TDP2 in low micromolar range without appreciable inhibition against the homologous TDP1 at the highest testing concentration
酪氨酰DNA磷酸二酯酶II(TDP2)是最近发现的一种酶,可特异性修复拓扑异构酶II(Top2)毒物引起的DNA损伤并引起对这些药物的耐药性。预期抑制TDP2可增强临床上重要的靶向Top2的抗癌药的功效。但是,作为治疗靶标的TDP2仍然知之甚少。我们在此报告了异喹啉-1,3-二酮作为选择性抑制TDP2的可行化学型的发现。最初的打击化合物43通过筛选我们内部的合成化合物来鉴定。进一步的结构活性关系(SAR)研究发现,在最高测试浓度(111μM)下,许多类似物在低微摩尔范围内抑制TDP2,而对同源TDP1没有明显的抑制作用。最佳化合物64抑制重组TDP2,IC 50为1.9μM 。这种化学型的发现可以为理解TDP2作为药物靶标提供一个平台。