Telomere and telomerase were closely related to the occurrence and development of some cancers. After the key active site of telomerase was identified, to enhance the ability of dihydropyrazole derivatives to inhibit telomerase, we designed a series of novel 4,5-dihydropyrazole derivatives containing heterocyclic oxygen moiety based on previous studies. The telomerase inhibition assay showed that compound 10a displayed the most potent inhibitory activity with an IC50 value of 0.6 μM for telomerase. The antiproliferative assay showed that 10a exhibited high activity against human gastric cancer cell SGC-7901 with an IC50 value of 10.95 ± 0.60 μM. Flow cytometric analysis and western blot results showed that 10a induced both apoptosis and autophagy. A docking simulation showed that 10a could bind well to the active site of telomerase and act as a telomerase inhibitor. The 3D-QSAR model was also built to provide a more pharmacological understanding that could be used to design new agents with more potent telomerase inhibitory activity.
端粒和端粒酶与某些癌症的发生发展密切相关。在鉴定出端粒酶关键活性部位后,基于以往的研究,为了增强
二氢吡唑衍
生物抑制端粒酶的能力,我们设计了一系列含有杂环
氧基的新型4,5-
二氢吡唑衍
生物。端粒酶抑制实验表明,化合物10a显示出最强的抑制活性,其对端粒酶的IC50值为0.6 μM。细胞增殖实验表明,10a对胃癌细胞SGC-7901具有很高的活性,其IC50值为10.95 ± 0.60 μM。流式
细胞分析和western blot结果显示,10a可诱导细胞凋亡和自噬。对接模拟显示,10a可与端粒酶的活性位点很好地结合,并作为端粒酶
抑制剂发挥作用。同时,为了能更好地指导设计出新的具有更强端粒酶抑制活性的化合物,我们构建了三维定量构效关系(3D-Q
SAR)模型。