中国寄生虫学与寄生虫病杂志 ›› 2012, Vol. 30 ›› Issue (2): 17-157.

• 研究简报 • 上一篇    下一篇

弓形虫对4种肿瘤细胞增殖及凋亡的影响

 武欣1, 孙黎2, 张力3, 刘正泉4, 罗强2, 张林西2 *   

  1. 1 河北北方学院研究生部,张家口 075000;2 河北北方学院生命科学研究中心,张家口 075000;3 西安医学院基础医学院,西安 710021;4  河北北方学院成人教育学院,张家口 075000
  • 出版日期:2012-04-30 发布日期:2012-09-28

Impact of Toxoplasma gondii on the Proliferation  and Apoptosis of Tumor Cell Lines

 WU  Xin1, SUN  Li2, ZHANG  Li3, LIU  Zheng-Quan4, LUO  Jiang2, ZHANG  Lin-Xi2 *   

  1. 1 Department of Post-Graduates,Hebei North University,Zhangjiakou 075000,China;2 Life Science Research Center,Hebei North University,Zhangjiakou 075000,China;3 College of Basic Medicine,Xi′an Medical University,Xi′an 710021,China;4 College of Adult Education,Hebei North University,Zhangjiakou 075000,China
  • Online:2012-04-30 Published:2012-09-28

摘要: 【提要】  用1×104个/ml~32×104个/ml 6个不同浓度刚地弓形虫RH株速殖子体外分别作用于对数生长期的乳腺癌MCF-7、前列腺癌DU-145、食管癌EC-109和肺癌A549细胞(5×104/ml) 24 h,运用CCK-8法测定弓形虫对上述肿瘤细胞的抑制作用,计算细胞抑制率。用1×104、2×104和4×104个/ml弓形虫速殖子体外作用于A549细胞24 h后,流式细胞仪检测肿瘤抑制基因P53和B细胞淋巴瘤/白血病-2(Bcl-2)基因所编码蛋白质的表达情况。结果显示,随着弓形虫速殖子浓度升高,各肿瘤细胞增殖抑制率增高,其效果与剂量呈正相关。1×104个/ml弓形虫速殖子即对MCF?鄄7、DU-145、EC-109和A549细胞增殖有抑制作用,其抑制率分别为19.7%、4.5%、28.0%和20.8%。各实验组肿瘤细胞增殖情况与对照组比较差异均有统计学意义(P<0.05)。流式细胞术检测A549细胞凋亡,凋亡率上升,且p53蛋白表达上调、Bcl-2蛋白表达下调。

关键词: 弓形虫, 肿瘤细胞, 流式细胞术, CCK-8法

Abstract: 【Abstract】 MCF-7,DU-145,EC109 and A549 tumor cells (5×104/ml) at mid-exponential phase were treated for 24 h with different concentrations of Toxoplasma gondii tachyzoites(1×104/ml-32×104/ml). The measurement of tumor cell growth inhibition rate was performed by using CCK-8 kit. The tachyzoites (1×104/ml-4×104/ml) were co-cultured with A549 tumor cells for 24 h. Flow cytometry techniques was applied to investigate the expression of p53 and Bcl-2. The results showed a remarkable inhibitory effect of the parasites on tumor cell proliferation,which presented a dosage dependence. MCF-7,DU-145,EC-109 and A549 cell lines treated with 1×104/ml T. gondii tachyzoites presented an inhibition rate of 19.7%,4.5%,28.0%,and 20.8%,respectively. There was a significant difference between experimental groups and the control (P<0.05). T. gondii induced cell apoptosis in A549 tumor cells. p53 and Bcl-2 gene expression was respectively up-regulated and down-regulated.

Key words: Toxoplasma gondii, Tumor cell, Flow cytometry, CCK-8 method