基础医学与临床 ›› 2016, Vol. 36 ›› Issue (6): 758-762.

• 研究论文 • 上一篇    下一篇

5-AZA抑制肝癌细胞BEL7402代谢方式转换

邓艳春1,侯彭姣1,陈杰民1,何小东2,刘长征1,刘卫1   

  1. 1. 中国医学科学院基础医学研究所
    2. 北京协和医院
  • 收稿日期:2016-03-16 修回日期:2016-04-20 出版日期:2016-06-05 发布日期:2016-05-27
  • 通讯作者: 刘卫 E-mail:liu_wei_95@sina.com
  • 基金资助:
    pGC-1α介导的miRNA表达及前体选择性加工在血糖稳定调节中分子机制研究;microRNA-105基因簇介导的调控网络在肝癌细胞代谢中的功能研究

5-AZA suppresses the metabolic shift in BEL7402 cells

  • Received:2016-03-16 Revised:2016-04-20 Online:2016-06-05 Published:2016-05-27
  • Supported by:
    Mechanism investigation of pGC-1α-induced miRNA expression and arm-switch in the maintenance of glucose homeostasis.;Investigation of microRNA-105 cluster function in regulating hepatoma cell metabolism.

摘要: 目的 研究去甲基化药物5-AZA对microRNA-34a/c(miR-34a、miR-34c)在肝癌细胞中表达的影响及其抑制肝癌细胞糖酵解的分子机制。方法 用real-time PCR法检测肝癌细胞系中miR-34a/c的表达以及糖酵解途径关键酶的表达;在肝癌细胞中过表达miR-34a、miR-34c或用5-AZA处理肝癌细胞,用乳酸检测试剂盒、葡萄糖检测试剂盒分析miR-34a/c及5-AZA对肝癌细胞BEL7402糖酵解的影响;设计拯救实验研究5-AZA、miR-34a/c与肝癌细胞糖酵解调控的关系。结果5-AZA可以诱导BEL7402肝癌细胞内源性miR-34a、miR-34c的表达上调(P<0.01);过表达miR-34a/c可以抑制糖酵解关键酶LDH-A的表达(P<0.05);LDH-A是miR-34a/c的潜在靶基因;敲低miR-34a/c的表达可以降低5-AZA对肝癌细胞BEL7302糖酵解途径的抑制作用。结论 5-AZA通过诱导miR-34a/c表达上调,发挥抑制肝癌细胞代谢方式转换的功能。

关键词: 去甲基化药物, miR-34, 肝细胞癌, 瓦伯格效应

Abstract: Objective To investigate the impact of 5-AZA on microRNA-34a/c (miR-34a and miR-34c) expression in human hepatocellular carcinoma (HCC) cells and to elucidate the molecular mechanism of 5-AZA for inhibiting glycolysis in HCC cells. Methods Real-time PCR analysis was conducted to determine the expression levels of miR-34a/c in HCC cells with 5-AZA treatment. The expression of specific genes related to glycolysis was evaluated by using Real-time PCR in HCC cells with miR-34 overexpression or 5-AZA treatment. The effect of miR-34a/c or 5-AZA treatment on the metabolic shift in HCC cells was explored by detecting the cellular lactate production and glucose consumption. Rescue assay was employed to investigate the correlation between 5-AZA, miR-34a/c, and the regulation of glycolysis in HCC cells. Results The expression of miR-34a/c is increased in 5-AZA-treated BEL7402 HCC cells (P<0.01). No significant change is observed in the expression of miR-34b in HCC cells with 5-AZA treatment. Enforced expression of miR-34a/c leads to reduced levels of LDH-A in BEL7402 HCC cells(P<0.05). Rescue assay reveals that inhibition of miR-34a/c to prevent 5-AZA induction results in suppressed glycolysis in BEL7402 HCC cells. Conclusion 5-AZA inhibits metabolic shift in HCC cells via inducing the expression of miR-34a/c.

Key words: Hypomethylating drugs, miR-34, HCC, Warburg effect

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