癌变·畸变·突变 ›› 2003, Vol. 15 ›› Issue (3): 144-146.doi: 10.3969/j.issn.1004-616x.2003.03.005

• 论著 • 上一篇    下一篇

彗星分析技术检测辐射和化学物质诱导的DNA损伤

曹 毅, 陈 瑞, 王仲文, 邢晓红, 王小莉   

  1. 中国辐射防护研究院生命科学研究所, 山西 太原 030006
  • 收稿日期:2002-10-24 修回日期:2002-12-15 出版日期:2003-07-30 发布日期:2003-07-30
  • 通讯作者: 曹 毅

MEASUREMENT OF DNA DAMAGES INDUCED BY RADIATION AND CHEMICALS USING COMET ASSAY

CAO Yi, CHEN Rui, WANG Zhong-wen, et al   

  1. China Institute for Radiation Protection,Taiyuan 030006, China
  • Received:2002-10-24 Revised:2002-12-15 Online:2003-07-30 Published:2003-07-30
  • Contact: CAO Yi

摘要: 目的: 用彗星分析技术(comet assay)检测邻苯二胺(o-phenylenediamine, o-PDA)和60 Coγ-射线对CHL细胞DNA的损伤。 方法: CHL细胞经0、 2、 4、 6、 8 μmol / L的邻苯二胺染毒和0、 2、 4、 6、 8、 10、 15 Gy 的60 Co γ-射线照射后,进行单细胞凝胶电泳,测定彗星尾长。采用Origin 4.2软件建立两种诱变剂的剂量与CHL细胞彗星尾长的剂效关系。 结果: DNA的损伤程度(以彗星尾长为指标)随60 Coγ-射线剂量的加大和o-PDA浓度的增加而增强,CHL细胞彗星尾长(TL)与60 Coγ-射线的剂效关系符合线性平方模型:TL=20.41+2.42D+0.38D 2;与o-PDA浓度的剂效关系符合线性平方模型:TL=1.90+1.46C+0.52C 2。 结论: 60 Co γ-射线剂量和o-PDA的浓度与细胞DNA损伤程度具有剂效关系;彗星分析是一种分析环境危害因子遗传毒性的有效技术。

关键词: 彗星分析, 邻苯二胺, 60 Coγ-射线, DNA损伤

Abstract: Purpose: To study DNA damages induced by 60 Co γ-radiation and o-phenylenediamine(o-PDA) using comet assay. Methods: The DNA damages induced by 0,2,4,6,8,10,15 Gy 60 Co γ-rays and 0,2,4,6,8 μmol / L o-PDA were measured using comet assay. The dose-respose relationship of the CHL cell tail length and the dose of the two type of mutagen were established with Origin 4 software. Results: The tail length of comet, index of DNA damage in this experiment, increased with the dose of 60 Co γ-ray and concentration of o-PDA, respectively. The dose-respose relationship of the CHL cell tail length(TL)and the dose of 60 Coγ-ray fitted for linear-quadratic model: TL=20.41+2.42D+0.38D 2; The dose-response relationships for DNA damage induced by o-PDA fitted for linear-quadratic model: TL=1.90+1.46C+0.52C 2. Conclusion: The comet assay is a useful tool for determining the genotoxicity of environmental agents.

Key words: comet assay, o-phenylenediamine, 60 Co γ-rays, DNA damages