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首页> 外文期刊>Toxins >Molecular Mechanisms of Apoptosis in HepaRG Cell Line Induced by Polyphyllin VI via the Fas Death Pathway and Mitochondrial-Dependent Pathway
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Molecular Mechanisms of Apoptosis in HepaRG Cell Line Induced by Polyphyllin VI via the Fas Death Pathway and Mitochondrial-Dependent Pathway

机译:多聚叶酸VI通过Fas死亡途径和线粒体依赖性途径诱导的多叶绿素诱导的HepaRG细胞凋亡的分子机制。

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Polyphyllin VI, which is an active saponin, is mainly isolated from traditional medicinal plant Paris polyphylla , which causes liver damage in rats. In the present study, we aimed to explore the potential cytotoxicity of polyphyllin VI on the growth of HepaRG cells and to determine the molecular mechanism. The results revealed that polyphyllin VI changed cell morphology and induced apoptosis in HepaRG cells. Flow cytometric assay displayed that polyphyllin VI promoted the generation of reactive oxygen species (ROS), depolarized the mitochondrial membrane potential (MMP), and induced S phase cell cycle arrest by decreasing the expression of cyclin A2 and CDK2, while significantly increasing the expression of p21 protein. Polyphyllin VI induced the release of cytochrome c from the mitochondria to the cytosol and activated Fas, caspase-3, -8, -9, and PARP proteins. Pretreatment with NAC and Z-VAD-FMK (ROS scavenger and caspase inhibitor, respectively) on HepaRG cells increased the percentage of viable cells, which indicated that polyphyllin VI induced cell apoptosis through mitochondrial pathway by the generation of ROS and Fas death-dependent pathway. All of the effects are in dose- and time-dependent manners. Taken together, these findings emphasize the necessity of risk assessment to polyphyllin VI and offer an insight into polyphyllin VI-induced apoptosis of HepaRG cells.
机译:Polyphyllin VI是一种活性皂苷,主要从传统药用植物巴黎多叶植物巴黎多叶植物中分离出来,会造成大鼠肝损伤。在本研究中,我们旨在探讨多叶素VI对HepaRG细胞生长的潜在细胞毒性,并确定其分子机制。结果表明,多聚叶绿素VI改变了细胞形态并诱导了HepaRG细胞凋亡。流式细胞仪检测表明,多叶绿素VI促进了活性氧(ROS)的产生,使线粒体膜电位(MMP)去极化,并通过降低细胞周期蛋白A2和CDK2的表达而诱导了S期细胞周期的阻滞,而显着增加了细胞周期蛋白A2和CDK2的表达。 p21蛋白。 Polyphyllin VI诱导细胞色素c从线粒体释放到细胞质并激活Fas,caspase-3,-8,-9和PARP蛋白。 NAC和Z-VAD-FMK(分别为ROS清除剂和caspase抑制剂)对HepaRG细胞的预处理增加了活细胞的百分比,这表明多叶绿素VI通过产生ROS和Fas死亡依赖性途径通过线粒体途径诱导细胞凋亡。 。所有的作用都是剂量和时间依赖性的。综上所述,这些发现强调了对多叶绿素VI进行风险评估的必要性,并提供了对多叶绿素VI诱导的HepaRG细胞凋亡的深入了解。

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