癌变·畸变·突变 ›› 2004, Vol. 16 ›› Issue (2): 89-91.doi: 10.3969/j.issn.1004-616x.2004.02.007

• 论著 • 上一篇    下一篇

电离辐射调控脂质体介导的TNFα基因在HeLa细胞中的表达

刘建香;苏 旭   

  1. 中国疾病预防控制中心辐射防护与核安全医学所,北京 100088
  • 收稿日期:2004-01-09 修回日期:2004-02-11 出版日期:2004-03-30 发布日期:2004-03-30
  • 通讯作者: 刘建香

Ionizing Radiation Regulated Expression of HeLa Cells by Lipofectamin-Mediated TNF α Gene

LIU Jian-xiang;SU Xu   

  1. National Institute for Radiological Protection, China CDC, Beijing 100088,China
  • Received:2004-01-09 Revised:2004-02-11 Online:2004-03-30 Published:2004-03-30
  • Contact: LIU Jian-xiang

摘要: 背景与目的: 用脂质体LipofectaminTM2000介导重组质粒p-Egr-TNFα转染人HeLa细胞,研究该重组质粒在不同剂量γ射线作用下在细胞中的表达、细胞周期和细胞凋亡的变化。 材料与方法: 用ELISA方法检测TNFα的表达,并探讨剂量效应关系,用流式细胞术检测细胞周期的变化。 结果: 不同剂量60Co γ射线照射后,p-Egr-TNFα在HeLa细胞中表达量为(250~400) pg/ml,明显高于对照组;照射转染后的HeLa细胞周期出现明显的S期和G2 M期阻滞,呈现剂量依赖性的增高,G0/G1比值则呈现剂量依赖性的下降。与之相对应,细胞凋亡率也呈现剂量依赖性的增高。结论: 60Co γ射线可以调控脂质体介导的重组质粒p-Egr-TNFα,在被转染的HeLa细胞中表达量明显增高,对细胞周期和细胞凋亡的影响也呈现剂量依赖性的效应关系。

关键词: 60Co γ射线, TNFα表达, 细胞周期, 剂量效应

Abstract: BACKGROUND & AIM : To investigate the expression of p-Egr-TNFα, cell cycle and apoptosis in HeLa cells, which were transfected by recombined plasmid p-Egr-TNFα, induced by 60Co γ-rays irradiation in different doses. MATERIAL AND METHODS: The expression of TNFα was detected by ELISA. The cell cycle and apoptosis were detected by Flow Cytometry. RESULTS: After γ-rays irradiation in different doses, the expression of TNFα was(250~400)pg/ml,significantly higher than that of the control group. The percentages of S and G2 M phase were markedly higher than that of the control group,and showed a dose-dependent increase, the rate of G0/G1 showed a dose-dependent decrease. Cell apoptosis rate showed a dose-dependent increase. CONCLUSION: γ-rays can regulate expression of p-Egr-TNFα by Lipofectamin-mediated TNFα gene in HeLa cells. The expression level shows a significantly increase in transfected HeLa cells. The change of cell cycle and apoptosis shows a dose-dependent effect.

Key words: 60Co γ-rays, TNFα expression, cell cycle, dose effect