基础医学与临床 ›› 2013, Vol. 33 ›› Issue (8): 976-980.

• 研究论文 • 上一篇    下一篇

5-氮杂胞苷对结肠癌细胞CHD5基因表达及细胞增殖活性的影响

赵蕊1,严启滔2,吕静野2,黄海丽1,马文丽1   

  1. 1. 南方医科大学
    2. 南方医科大学基因工程研究所
  • 收稿日期:2012-07-03 修回日期:2012-10-24 出版日期:2013-08-05 发布日期:2013-07-18
  • 通讯作者: 马文丽 E-mail:wenlima1964@163.com
  • 基金资助:
    白血病抑癌基因CHD5的表达调控研究;抑癌基因CHD5调控基因组稳定性的研究;CHD5基因转录调控机制的研究;抑癌基因CHD5调控染色体稳定性的研究

Effect of 5-aza-2’-deoxycytidine on CHD5 gene expression and proliferation of Human Colon Carcinoma cell

  • Received:2012-07-03 Revised:2012-10-24 Online:2013-08-05 Published:2013-07-18

摘要: 目的 研究甲基化转移酶抑制剂5 -氮杂-2-脱氧胞苷(5-氮杂胞苷,AZA)对人肿瘤相关基因CHD5(染色质解旋酶DNA结合蛋白5)在结肠癌细胞中的基因转录的诱导作用以及其对细胞增殖的影响。方法5μmol/L 5-氮杂胞苷分别作用于Lovo和SW480细胞,连续作用72h后,用荧光定量PCR(qPCR)检测两种结肠癌细胞株中CHD5 mRNA的表达,重亚硫酸盐测序(BSP)法分析启动子区的甲基化状况,MTT法分析5-氮杂胞苷对Lovo和SW480细胞增殖的影响。结果5μmol/L 5-氮杂胞苷处理Lovo和SW480细胞72h后,Lovo和SW480细胞中CHD5基因的发生了去甲基化,其mRNA重新表达,细胞生长受到抑制。结论5-氮杂胞苷能够逆转CHD5基因的甲基化状态,调控CHD5 mRNA表达,并能有效地抑制结肠癌细胞的增殖。

关键词: CHD5 基因, 甲基化, 结肠癌细胞

Abstract: Objective To study the effect of 5-Aza-2-deoxycytidine (AZA) on re-expression of the hypermethylated and silenced CHD5(Chromodomain, helicase, DNA-binding 5) gene in human colon carcinoma cell and cell proliferation. Methods Lovo and SW480 cells were exposed to 5μmol/L AZA for 72h, and then CHD5 expression was determined by quantitative RT-PCR (qPCR), methylation status of CHD5 genes was determined by bisulfite sequencing PCR (BSP), and the proliferation of the cells was evaluated by MTT assay. Results After treatment with 5μmol/L AZA, the promoter region of the CHD5 gene exhibited a demethylation status, and CHD5 mRNA was re-expressed.Meanwhile, the growth of Lovo and SW480 cells were reduced. Conclusions AZA could reverse methylation of CHD5 gene to regulate the expression of CHD5 gene, and could effectively inhibit the cellular proliferation of human colon carcinoma cell.

Key words: CHD5 gene, methylation, Colon Carcinoma

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