›› 2011, Vol. 23 ›› Issue (6): 442-445.doi: 10.3969/j.issn.1004-616x.2011.06.009

• 核辐射安全专家论坛 • 上一篇    下一篇

单细胞凝胶电泳技术用于估算大剂量电离辐射的初步探索

段志凯,时爱丽,刘建功,王斌生,郭万龙, 张淑贤   

  1. 1. 中国辐射防护研究院,山西 太原 030006;2. 山西省荣军医院,山西 太原 030006
  • 收稿日期:2011-04-15 修回日期:2011-09-29 出版日期:2011-11-30 发布日期:2011-11-30
  • 通讯作者: 段志凯

High dose radiation-induced DNA damage using single cell gel electrophoresis

DUAN Zhi-kai,SHI Ai-li,LIU Jian-gong,WANG Bin-sheng,GUO Wan-long,ZHANG Shu-xian   

  1. 1. Radiation Medicine Institute and Environmental Medicine, China Institute for Radiation Protection, Taiyuan 030006; 2. Shanxi Province Rongjun Hospital, Taiyuan 030006, Shanxi, China
  • Received:2011-04-15 Revised:2011-09-29 Online:2011-11-30 Published:2011-11-30
  • Contact: DUAN Zhi-kai

摘要: 目的: 初步探索碱性单细胞凝胶电泳 (single cell gel electrophoresis,SCGE)方法用于大剂量电离辐射生物剂量估算的可行性。方法:用不同剂量水平 (0~16 Gy)的60Coγ射线照射正常人离体外周血,分别于照射后即刻和1 h后进行SCGE检测,用CASP软件分析血细胞“彗星”尾矩(tail moment,TM),建立剂量-效应曲线。结果:外周血细胞“彗星”尾矩随着照射剂量的增加而增加。以“彗星”尾矩为指标,使用统计软件Origin 7.5进行拟合,受照即刻在0~16 Gy剂量范围内彗星TM 值与受照剂量D 之间的剂量-效应曲线为曲线模式,曲线方程为Y=0.836 7+0.530 9D + 0.079 9D2 (R2=0.996 2,P<0.05),而 0~8 Gy剂量范围内剂量-效应曲线为线性模式,直线方程为Y=0.400 3+1.129 1D (R2=0.996 3, P<0.05)。受照1 h后 0~16 Gy剂量范围内,彗星TM 值与受照剂量D 之间的关系曲线为Y=0.461 6+0.656 0D+0.062 1D2 (R2=0.9984,P<0.05),0~8 Gy剂量范围内的关系曲线为Y=0.107 1+1.128 3D (R2=0.999 5,P<0.05)。结论:用碱性SCGE分析淋巴细胞“彗星”尾矩有望成为一种估算大剂量电离辐射的生物剂量计。

关键词: 单细胞凝胶电泳, 电离辐射, 外周血, 剂量-效应关系

Abstract: OBJECTIVE: To explore the feasibility of single cell gel electrophoresis (SCGE) in estimation of radiation biological dose. METHODS:Normal peripheral blood samples from two healthy males were exposed to different doses 60Co γ-rays,ranged from 0 to 16 Gy. Immediately and 1 h later,tail moment (TM) of the peripheral blood cells were analyzed with casp software in order to establish dose-effect relationship. RESULTS:The TMs immediately after radiation of peripheral blood cells increased with the irradiation doses,and its relationship can be fitted as:Y=0.836 7+0.530 9D+0.079 9 D2 (R2=0. 9962,P<0.05) from 0 to 16 Gy,and Y=0.400 3+1.129 1D (R2=0.9963,P<0.05) from 0 to 8 Gy. The TMs of peripheral blood cells 1 h after radiation increased with the irradiation doses,and its relationship can be fitted as:Y =0.461 6 + 0.656 0D+0.062 1 D2 (R2=0.998 4,P<0.05) from 0 to 16 Gy,and Y=0.107 1+1.128 3D (R2=0.999 5, P<0.05) from 0 to 8 Gy. CONCLUSION:The TM of peripheral blood cells analyzed with SCGE is a promising radiation biological dosimeter at high doses.

Key words: single cell gel electrophoresis, ionizing radiation, peripheral blood, dose -effect relationship