›› 2007, Vol. 19 ›› Issue (6): 444-447.doi:

• 论著 • 上一篇    下一篇

三氧化二砷抑制人乳腺癌MDA_MB_468细胞生长及其机制的研究

单保恩 /周 艳   

  1. 河北医科大学第四医院科研中心
  • 收稿日期:2007-02-14 修回日期:2007-07-09 出版日期:2007-11-30 发布日期:2007-11-30

Inhibitory Effect and Mechanisms of As2O3 on Human Breast Cancer MDA_MB_468 Cells

SHAN Bao-en, ZHOU Yan   

  1. Research Center,the Fourth Hospital of Hebei Medical University, Shijiazhuang 050011,Hebei China
  • Received:2007-02-14 Revised:2007-07-09 Online:2007-11-30 Published:2007-11-30

摘要: 背景与目的: 探讨三氧化二砷(As2O3)对人乳腺癌MDA_MB_468细胞的生长抑制作用及其对syk表达的影响。 材料与方法: 采用四甲基偶氮唑蓝(MTT)法检测不同浓度As2O3作用MDA_MB_468细胞不同时间后,对细胞增殖的抑制作用;显微镜观察细胞的形态变化;As2O3作用细胞后用流式细胞术检测细胞周期及Syk蛋白表达变化;RT_PCR检测syk mRNA的表达变化。 结果: As2O3可显著抑制MDA_MB_468细胞增殖,且抑制效应呈剂量和时间依赖性(P<0.05);As2O3可使细胞周期阻滞在S+G2/M期;候选抑癌基因syk在乳腺癌MDA_MB_468细胞中表达,经As2O3作用后,MDA_MB_468细胞syk mRNA和Syk蛋白表达水平明显升高(P<0.05)。 结论: As2O3可能通过上调候选抑癌基因syk的表达,抑制MDA_MB_468细胞增殖,从而发挥抗肿瘤作用。

关键词: As2O3, 人乳腺癌细胞, MDA_MB_468细胞, 细胞凋亡, Syk

Abstract: BACKGROUND & AIM: The inhibitory effect of arsenic trioxide (As2O3) on human breast cancer MDA_MB_468 cells and the change of syk expression. MATERIALS AND METHODS: After treatment with various concentrations of As2O3, MDA_MB_468 cells proliferation was assessed by using methyl thiazolyl tetrazolium(MTT) method. The morphologic changes of MDA_MB_468 cells were examined with light microscope. After treated with As2O3 , cell cycle distribution and expression of Syk protein were measured by flow cytometry(FCM). Expression of syk mRNA was eveluated with RT_PCR. RESULTS: As2O3 inhibited the proliferation of MDA_MB_468 cells significantly, and in a time and dose_dependent manner (P<0.05). After treatment with As2O3, MDA_MB_468 cell cycle was arrested in the S+G2/M phase. MDA_MB_468 cells expressed syk mRNA, As2O3 enhanced syk mRNA and Syk protein expression of MDA_MB_468 cells. CONCLUSIONS: As2O3 may inhibit the proliferation of MDA_MB_468 cells by enhancing the expression of syk.

Key words: arsenic trioxide, human breast cancer cell, MDA_MB_468 cell, apoptosis, syk