摘要
目的探讨桃叶珊瑚苷(AU)对人肝癌细胞系HepG2增殖、凋亡和细胞周期的影响及其作用机制。方法体外培养HepG2细胞,CCK-8法筛选AU的最佳给药浓度。随机将HepG2细胞分为对照组、AU 12.5 mg/L组(AU L组)、AU 62.5 mg/L组(AU H组)和AU H+Akt通路激动剂(SC79)组(AU H+SC79组),观察各组细胞增殖状态。5-乙炔基-2′脱氧尿嘧啶核苷(EDU)法检测细胞增殖;流式细胞测量术检测细胞凋亡和细胞周期;Western blot检测磷酸化-蛋白激酶B(p-Akt)、Akt、p-MDM2、MDM2、p-p53、p53蛋白表达水平。结果选择浓度为12.5、62.5 mg/L的AU进行后续实验。与0 mg/L AU比较,AU L组、AU H组细胞增殖显著降低(P<0.05);与对照组比较,AU L、AU H组悬浮和脱落细胞逐渐增多,细胞皱缩变圆,G0/G1期细胞占比、EDU阳性染色细胞比例以及p-Akt/Akt、p-MDM2/MDM2蛋白表达水平下降,S和G2/M期细胞占比、细胞凋亡率以及p-p53/p53蛋白表达水平升高(P<0.05);与AU H组比较,AU H+SC79组上述变化得到改善(P<0.05);移植瘤裸鼠接受AU治疗后,瘤体体积和质量均下降。结论AU可能通过调控Akt/MDM2/p53信号通路抑制人肝癌细胞增殖,诱导细胞周期阻滞与细胞凋亡。
Objective To investigate the effects of aucubin(AU)on the proliferation,apoptosis,and cell cycle of human liver cancer cells line HepG2 and its mechanism of action.Methods HepG2 cells were cultured in vitro,CCK-8 method was applied to screen the optimal dosage concentration of AU.HepG2 cells were randomly grouped into a control group,an AU 12.5 mg/L group(AU L group),an AU 62.5 mg/L group(AU H group),and an AU H+Akt pathway agonist(SC79)group(AU H+SC79 group).The cell proliferation was observed in each group;5-Ethynyl-2′-deoxyuridine(EDU)method was applied to detect cell proliferation;Flow cytometry was applied to detect cell apoptosis and cell cycle;Western blot was applied to detect the expression levels of phosphorylated protein kinase B(p-Akt),Akt,p-MDM2,MDM2,p-p53,and p53 proteins.Results AU concentrations of 12.5 and 62.5 mg/L were selected for subsequent experiments.Compared with 0 mg/L AU,the proliferation of 12.5 and 62.5 mg/L AU cells was obviously reduced(P<0.05);Compared with the control group,the number of suspended and exfoliated cells in the AU L and AU H groups gradually increased.Cells shrunk and became round.The proportion of G0/G1 phase cells,the proportion of EDU positive staining cells increased and the expression level of p-Akt/Akt and p-MDM2/MDM2 proteins decreased.The proportions of S and G2/M phase cells,the rate of cell apoptosis,and the expression level of p-p53/p53 protein all increased(P<0.05).Compared with the AU H group,the above changes in the AU H+SC79 group were recovered(P<0.05).After AU treatment,the tumor volume and weight of transplanted nude mice decreased.Conclusions AU may inhibit the proliferation of liver cancer cells,induce cell cycle arrest and apoptosis by regulating the Akt/MDM2/p53 signaling pathway.
作者
安琪
齐光照
韩超
AN Qi;QI Guangzhao;HAN Chao(Department of Pharmacy,the First Affiliated Hospital of Zhengzhou University,Zhengzhou 450000,China)
出处
《基础医学与临床》
2024年第3期333-338,共6页
Basic and Clinical Medicine
基金
河南省医学科技攻关计划项目(LHGJ20190270)。
关键词
桃叶珊瑚苷
肝癌细胞
增殖
凋亡
细胞周期
aucubin
liver cancer cell
proliferation
apoptosis
cell cycle
