Synthesis and Anticancer Activity of Novel Benzimidazole and Benzothiazole Derivatives against HepG2 Liver Cancer Cells
作者:Amal M. Youssef、Ahmed Malki、Mona H. Badr、Rasha Y. Elbayaa、Ahmed S. Sultan
DOI:10.2174/157340612800493719
日期:2012.4.26
Most of cancer chemotherapeutics and chemopreventives exert their effects by triggering apoptotic cell death. In this study, novel benzimidazole and benzothiazole derivatives have been synthesized to investigate their effects on HepG2 liver cancer cell lines after initial screening study. A dose response curve was constructed and the most active derivatives were further studied for apoptotic analysis. Six active benzimidazole derivatives (8, 9, 10, 12, 13 and 14) significantly induced apoptosis compared to control group. Two compounds 10 and 12 induced apoptosis by arresting cells in G1 phase of cell cycle which is confirmed by increased expression level of p21. The activity of caspase-3 which is well known as one of the key executioners of apoptosis was determined in the presence and absence of the tested derivatives. Our results indicated that compounds 10 and 12 significantly increased caspase-3 activity compared to control group. Moreover, a docked pose of compounds 10 and 12 was obtained bound to caspase-3 active site using Molecular Operating Environment module. This study demonstrated that benzimidazole derivatives 10 and 12 provoke cytotoxicity and induced apoptosis in liver cancer cells HepG2.
大多数抗癌化疗药物和化学预防剂通过触发细胞凋亡发挥作用。在本研究中,通过初步筛选研究,合成了新型苯并咪唑和苯并噻唑衍生物,以调查它们对HepG2肝癌细胞系的影响。构建了剂量-反应曲线,并对最具活性的衍生物进行了进一步的凋亡分析。六种活性苯并咪唑衍生物(8、9、10、12、13和14)与对照组相比显著诱导了凋亡。两种化合物10和12通过将细胞周期阻滞在G1期诱导凋亡,这通过p21表达水平的增加得到证实。在测试衍生物的存在和不存在下,测定了已知为凋亡关键执行者之一的caspase-3的活性。我们的结果表明,与对照组相比,化合物10和12显著增加了caspase-3的活性。此外,使用分子操作环境模块获得了化合物10和12与caspase-3活性位点结合的对接构象。本研究证明了苯并咪唑衍生物10和12在肝癌细胞HepG2中引发了细胞毒性和诱导了凋亡。