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• 基础研究 • 上一篇    下一篇

电离辐射对Jurkat T细胞周期进程的影响

张 萱1,2,刘 宁1,刘 扬2,王珍琦2,张 丽2,刘 淼2,龚守良2,刘志强1   

  1. 1.中国科学院长春应用化学研究所 新药研究实验室,吉林 长春 130022;2.吉林大学公共卫生学院 卫生部放射生物学重点实验室,吉林 长春 130021
  • 收稿日期:2006-07-04 修回日期:1900-01-01 出版日期:2007-05-28 发布日期:2007-05-28
  • 通讯作者: 刘志强

Effect of ionizing radiation on cell cycle progression of Jurkat T cells

ZHANG Xuan1,2,LIU Ning1,LIU Yang2,WANG Zhen-qi2,ZHANG Li2,LIU Miao2,GONG Shou-liang2,LIU Zhi-qiang1   

  1. 1.Laboratory of New Drug Research,Changchun Institute of Applied Chemistry,Chinese Academy of Science,Changchun 130022,China;2.MH Radiobiology Research Unit,School of Public Health,Jilin University,Changchun 130021,China
  • Received:2006-07-04 Revised:1900-01-01 Online:2007-05-28 Published:2007-05-28
  • Contact: LIU Zhi-qiang

摘要: 目的:探讨电离辐射诱导Jurkat T细胞损伤过程中细胞周期进程的变化规律。方法:采用流式细胞术 (FCM) 检测低剂量(0.075 Gy)和较大剂量(0.5、1.0、2.0、4.0及6.0 Gy)X射线照射后Jurkat T细胞周期进程变化的时间-效应关系和剂量-效应关系。结果:时间-效应关系研究发现,2.0 Gy X射线照射后Jurkat T细胞相继发生S期延迟和G2期阻滞,S期细胞百分率于照射后立即增加(P<0.001),而G2+M期细胞百分率照射后8 h开始显著增加(P<0.001)。剂量-效应关系研究发现,75 mGy低剂量X射线照射即可诱导Jurkat T细胞发生S期延迟(P<0.001)和G2期阻滞(P<0.05);0.5~6.0 Gy较大剂量X射线照射后,Jurkat T细胞发生S期延迟和G2期阻滞。与假照组相比较,G0/G1期细胞百分率显著降低(P<0.001),在0.5~6.0 Gy内具有剂量依赖性,而S期和G2+M期细胞百分率显著升高(P<0.05或P<0.001)。结论:X射线照射可以改变Jurkat T细胞周期进程,诱导其相继发生S期延迟和G2期阻滞,在0.5~6.0 Gy内具有剂量依赖性。

关键词: 电离, Jurkat T细胞, 细胞周期, G2<, sub>期阻滞

Abstract: To investigate the change regularity of cell cycle progression in Jurkat T cells damaged by ionizing radiation.Methods The time- and dose-effects of cell cycle progression in Jurkat T cells after X-irradiation with different doses(0.075,0.5,1.0,2.0,4.0 and 6.0 Gy) were detected with flow cytometry. Results For the time-effect,the percentage of Jurkat T cells in S phase immediately increased after irradiation with 2.0 Gy X-rays,and that of G2 + M phase cells increased significantly 8 h after irradiation as compared with that in the sham-irradiation (P<0.001).For the dose-effect,the percentage of G0/G1 phase cells 18 h after irradiation with 0.075 Gy and 0.5-6.0 Gy was significantly lower than that in the sham-irradiation in a dose-dependent pattern (P<0.001),while the percentages of S and G2 + M phase cells increased significantly (P<0.001). Conclusion Ionizing radiation with 0.5-6.0 Gy X-rays could induce S delay and G2 arrest in Jurkat T cells in a dose-dependent pattern.

Key words: ionizing , Jurkat T cell, cell cycle, G2<, sub> arrest

中图分类号: 

  • R817.1