作者:Nuria Díaz-Argelich、Ignacio Encío、Daniel Plano、Aristi P. Fernandes、Juan Antonio Palop、Carmen Sanmartín
DOI:10.3390/molecules22081288
日期:——
Selenium (Se) compounds are potential therapeutic agents in cancer. Importantly, the biological effects of Se compounds are exerted by their metabolites, with methylselenol (CH3SeH) being one of the key executors. In this study, we developed a new series of methylselenoesters with different scaffolds aiming to modulate the release of CH3SeH. The fifteen compounds follow Lipinski’s Rule of Five and with exception of compounds 1 and 14, present better drug-likeness values than the positive control methylseleninic acid. The compounds were evaluated to determine their radical scavenging activity. Compound 11 reduced both DPPH and ABTS radicals. The cytotoxicity of the compounds was evaluated in a panel of five cancer cell lines (prostate, colon and lung carcinoma, mammary adenocarcinoma and chronic myelogenous leukemia) and two non-malignant (lung and mammary epithelial) cell lines. Ten compounds had GI50 values below 10 μM at 72 h in four cancer cell lines. Compounds 5 and 15 were chosen for further characterization of their mechanism of action in the mammary adenocarcinoma cell line due to their similarity with methylseleninic acid. Both compounds induced G2/M arrest whereas cell death was partially executed by caspases. The reduction and metabolism were also investigated, and both compounds were shown to be substrates for redox active enzyme thioredoxin reductase.
硒(Se)化合物在癌症治疗中具有潜在的治疗作用。重要的是,硒化合物的生物效应是通过其代谢产物发挥的,其中甲基硒醇(CH3SeH)是一个关键的执行者。在本研究中,我们开发了一系列具有不同骨架的甲基硒酯,旨在调节CH3SeH的释放。这十五种化合物遵循Lipinski的五规则,并且除了化合物1和14外,其药物相似性值均优于阳性对照甲基硒酸。对这些化合物进行了自由基清除活性评估,其中化合物11能减少DPPH和ABTS自由基。在五种癌细胞系(前列腺、结肠和肺癌,乳腺腺癌和慢性髓性白血病)和两种非恶性细胞系(肺和乳腺上皮)中评估了这些化合物的细胞毒性。十种化合物在72小时内在四种癌细胞系中GI50值低于10 μM。由于与甲基硒酸的相似性,化合物5和15被选为进一步在乳腺腺癌细胞系中进行作用机制表征。这两种化合物均诱导G2/M期阻滞,而细胞死亡部分通过caspase介导。还研究了它们的还原和代谢,这两种化合物都被证明是还原型酶硫氧还蛋白还原酶的底物。