MHY440, a Novel Topoisomerase Ι Inhibitor, Induces Cell Cycle Arrest and Apoptosis via a ROS-Dependent DNA Damage Signaling Pathway in AGS Human Gastric Cancer Cells
作者:Jung Jang、Yong Kang、Bokyung Sung、Min Kim、Chaeun Park、Dongwan Kang、Hyung Moon、Hae Chung、Nam Kim
DOI:10.3390/molecules24010096
日期:——
apoptotic effect of MHY440 was reactive oxygen species (ROS)-dependent, as evidenced by the inhibition of MHY440-induced PARP cleavage and ROS generation via N-acetylcysteine-induced ROS scavenging. Taken together, MHY440 showed anticancer effects by inhibiting Topo I, regulating the cell cycle, inducing apoptosis through caspase activation, and generating ROS, suggesting that MHY440 has considerable potential
我们研究了MHY440在AGS人胃癌细胞中的抗肿瘤活性和作用机理。MHY440抑制拓扑异构酶(Topo)I活性,并与DNA损伤应答信号传导途径相关。相对于Hs27人包皮成纤维细胞,它对AGS细胞表现出更强的抗增殖作用,并且这种作用是时间和浓度依赖性的。MHY440还可以通过减少细胞周期蛋白B1,Cdc2和Cdc25c并上调p53和p73来增加G2 / M期的细胞停滞。MHY440通过上调Fas-L,Fas和Bax以及BH3相互作用域死亡激动剂和聚(ADP-核糖)聚合酶的蛋白水解诱导AGS细胞凋亡。它也导致线粒体膜电位的丧失。Z-VAD-FMK预处理可抑制MHY440诱导的凋亡细胞死亡,泛半胱天冬酶抑制剂,表明凋亡是caspase依赖性的。此外,MHY440的凋亡效应是活性氧(ROS)依赖性的,这可以通过抑制MHY440诱导的PARP裂解和通过N-乙酰半胱氨酸诱导的ROS清除产生ROS来证明