作者:Satyajit Singh、Ashish Triambak Baviskar、Vaibhav Jain、Nidhi Mishra、Uttam Chand Banerjee、Prasad V. Bharatam、Kulbhushan Tikoo、Mohan Paul Singh Ishar
DOI:10.1039/c3md00125c
日期:——
Substituted 3-formylchromones were synthesized and evaluated as inhibitors of the human DNA topoisomerase IIα (hTopo-IIα) enzyme. The results of the decatenation, relaxation and DNA intercalation assays revealed that the compounds (11b, 12a, 12b, 12d, 12e, 13a and 13b) exhibited potent inhibitory activity against the hTopo-IIα enzyme, and are nonintercalating agents. These compounds also possess significant in vitro cytotoxicity (LC50 ranges from 0.5â8.6 μM) against prostate (PC-3) cancerous cell line as seen in comparison to the standard drug etoposide. To further probe the plausible mode of action of 3-formylchromone derivatives, molecular docking studies have also been carried out, which showed that the compounds under investigation fitted well in the ATP binding pocket of hTopo-IIα enzyme with good docking scores and form nonbonding interactions with the crucial residues of the catalytic site.
取代的3-甲醛吡喃酮被合成并评价为人类DNA拓扑异构酶IIα(hTopo-IIα)酶的抑制剂。脱连环、松弛和DNA嵌插实验的结果显示,这些化合物(11b、12a、12b、12d、12e、13a和13b)对hTopo-IIα酶显示出强大的抑制活性,并且是非嵌插剂。这些化合物还表现出显著的体外细胞毒性(LC50范围为0.5至8.6 μM),对前列腺(PC-3)癌细胞系的毒性可与标准药物依托泊苷相比。为了进一步探究3-甲醛吡喃酮衍生物的可能作用机制,还进行了分子对接研究,结果显示,所研究的化合物很好地适应hTopo-IIα酶的ATP结合口袋,具有良好的对接分数,并与催化位点的关键残基形成非键相互作用。