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电离辐射对Jurkat T细胞周期进程的影响
引用本文:张萱,刘宁,刘扬,王珍琦,张丽,刘淼,龚守良,刘志强. 电离辐射对Jurkat T细胞周期进程的影响[J]. 吉林大学学报(医学版), 2007, 33(3): 414-417. DOI: 国家自然科学基金资助课题(20675079)
作者姓名:张萱  刘宁  刘扬  王珍琦  张丽  刘淼  龚守良  刘志强
作者单位: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;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;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;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
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:辐射  电离  Jurkat T细胞  细胞周期  G2期阻滞
文章编号:1671-587X(2007)03-0414-04
收稿时间:2006-07-04
修稿时间:2006-07-04

Effect of ionizing radiation on cell cycle progression of Jurkat T cells
ZHANG Xuan,LIU Ning,LIU Yang,WANG Zhen-qi,ZHANG Li,LIU Miao,GONG Shou-liang,LIU Zhi-qiang. Effect of ionizing radiation on cell cycle progression of Jurkat T cells[J]. Journal of Jilin University: Med Ed, 2007, 33(3): 414-417. DOI: 国家自然科学基金资助课题(20675079)
Authors:ZHANG Xuan  LIU Ning  LIU Yang  WANG Zhen-qi  ZHANG Li  LIU Miao  GONG Shou-liang  LIU Zhi-qiang
Affiliation: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
Abstract:Objective 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.
Keywords:radiation, ionizing    Jurkat T cell   cell cycle   G2 arrest
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