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低剂量电离辐射对小鼠睾丸生精细胞中活性氧活性和线粒体膜电位的影响

王志成,李艳博,郭 伟,赵红光,姜晓燕,吕文天,龚守良   

  1. 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:2006-05-23 修回日期:1900-01-01 出版日期:2007-09-28 发布日期:2007-09-28
  • 通讯作者: 龚守良

Effects of low dose radiation on activity of reactive oxygen species and

WANG Zhi-cheng, LI Yan-bo, GUO Wei, ZHAO Hong-guang, JIANG Xiao-yan, LU Wen-tian, Gong Shou-liang   

  1. Key Laboratory of Radiobiology, Ministry of Health,School of Public Health, Jilin University, Changchun 130021, China
  • Received:2006-05-23 Revised:1900-01-01 Online:2007-09-28 Published:2007-09-28
  • Contact: Gong Shou-liang

摘要: 目的: 研究低剂量电离辐射对小鼠睾丸生精细胞中活性氧(ROS)活性和线粒体膜电位(△Ψm)的影响。方法: 以2′,7′-二氢二氯荧光黄双乙酸钠(DCFH-DA)和罗丹明123(Rhodamine 123)为探针,采用流式细胞术,间接检测细胞内ROS活性和△Ψm。结果: 不同剂量X-线照射后12 h,小鼠睾丸生精细胞中ROS活性较0 Gy组增加,并且随剂量增加而增加(P<0.05);△Ψm则表现为随剂量增加而降低(P<0.05)。0.075 Gy X线照射后与0 h比较,ROS活性随时间推移而增加(P<0.05),12 h达峰值,并且维持在较高水平;△Ψm则随时间推移而降低(P<0.05),12 h降到最低后逐渐恢复到正常水平。结论: 低剂量电离辐射能够诱导小鼠睾丸生精细胞中ROS活性增加,而△Ψm降低,并且具有一定的剂量和时程效应规律性。

关键词: 电离, 活性氧, 线粒体膜电位, 流式细胞术

Abstract: Abstract:Objective To investigate the efftcets of low dose X-ray radiation on the activity of the reactive oxygen species (ROS) and mitochondrion membrane potential (△Ψm) in spermatogenic cells of mouse testes. Methods The ROS activity and △Ψm in the cells were measured indirectly by flow cytometry with 2′, 7′-dichlorofluorescin diacetate (DCFH-DA) and Rhodamine 123 probes. Results The ROS activity increased with the increase of irradiation doses 12 h after irradiation with different doses of X-rays compared with 0 Gy (P<0.05); but the △Ψm decreased with the increase of irradiation doses compared with 0 Gy (P<0.05). After irradiation with 0.075 Gy X-rays, the ROS activity increased with time prolongation compared with 0 h (P<0.05),  reached the peak at 12 h later, and kept the higher level; but △Ψm decreased with the time prolongation, compared with 0 h (P<0.05), and reached the lowest level at 12 h later, then recovered to the normal level gradually. Conclusion Low dose radiation can induce the the increase of ROS and decrease of △Ψm in spermatogenic cells of mouse testes, and has dose- and time-effect regulations.

Key words: ionizing, reactive oxygen species, mitochondrion membrane potential, flow cytometry

中图分类号: 

  • R363