Novel Coumarin-Containing Aminophosphonatesas Antitumor Agent: Synthesis, Cytotoxicity, DNA-Binding and Apoptosis Evaluation
作者:Ya-Jun Li、Cai-Yi Wang、Man-Yi Ye、Gui-Yang Yao、Heng-Shan Wang
DOI:10.3390/molecules200814791
日期:——
A series of novel coumarin-containing α-aminophosphonates were synthesized and evaluated for their antitumor activities against Human colorectal (HCT-116), human nasopharyngeal carcinoma (human KB) and human lung adenocarcinoma (MGC-803) cell lines in vitro. Compared with 7-hydroxy-4-methylcoumarin (4-MU), most of the derivatives showed an improved antitumor activity. Compound 8j (diethyl 1-(3-(4-methyl-2-oxo-2H-chromen-7-yloxy) propanamido)-1-phenylethyl-Phosphonate), with IC50 value of 8.68 μM against HCT-116 cell lines, was about 12 fold than that of unsubstituted parent compound. The mechanism investigation proved that 8c, 8d, 8f and 8j were achieved through the induction of cell apoptosis by G1 cell-cycle arrest. In addition, the further mechanisms of compound 8j-induced apoptosis in HCT-116 cells demonstrated that compound 8j induced the activations of caspase-9 and caspase-3 for causing cell apoptosis, and altered anti- and pro-apoptotic proteins. DNA-binding experiments suggested that some derivatives bind to DNA through intercalation. The results seem to imply the presence of an important synergistic effect between coumarin and aminophosphonate, which could contribute to the strong chelating properties of aminophosphonate moiety.
合成了一系列含有香豆素结构的α-氨基膦酸酯类新化合物,并评估了它们对体外人结直肠癌(HCT-116)、人鼻咽癌(人KB)和人肺腺癌(MGC-803)细胞系的抗癌活性。与7-羟基-4-甲基香豆素(4-MU)相比,大多数衍生物显示出增强的抗癌活性。化合物8j(二乙基1-(3-(4-甲基-2-氧-2H-色烯-7-基氧)丙酰胺基)-1-苯乙基膦酸酯),对HCT-116细胞系的IC50值为8.68 μM,是其未取代母体化合物的约12倍。机制研究表明,8c、8d、8f和8j通过诱导G1期细胞周期阻滞来实现细胞凋亡。此外,进一步揭示了化合物8j诱导HCT-116细胞凋亡的机制,表明化合物8j通过激活caspase-9和caspase-3引起细胞凋亡,并改变抗凋亡和促凋亡蛋白。DNA结合实验表明,某些衍生物通过嵌插与DNA结合。结果似乎暗示了香豆素和氨基膦酸酯之间存在重要的协同效应,这可能有助于氨基膦酸酯部分的强螯合特性。