癌变·畸变·突变 ›› 2008, Vol. 20 ›› Issue (1): 6-010.doi: 10.3969/j.issn.1004-616x.2008.01.002

• 论著 • 上一篇    下一篇

对PTEN缺失小鼠成纤维细胞中DNA氧化损伤的研究

苟 巧1,2霍艳英1,胡迎春1,李 刚1,吴德昌1   

  1. 1.军事医学科学院放射与辐射医学研究所,北京 100850; 2. 重庆医科大学病理学教研室,重庆 400016
  • 收稿日期:2007-11-22 修回日期:2007-11-30 出版日期:2008-01-30 发布日期:2008-01-30
  • 通讯作者: 霍艳英

PTEN Deletion Leads to Increased Oxidative DNA Damage in Mouse Embryonic Fibroblasts

GOU Qiao1,2 HUO Yan-ying1,, HU Ying-chun1, LI Gang1, WU De-chang1   

  1. 1. Beijing Insititute of Radiation Medicine, Beijing 100850;2. Department of Pathology, Chongqing University of Medical Science, Chongqing 400016, China
  • Received:2007-11-22 Revised:2007-11-30 Online:2008-01-30 Published:2008-01-30
  • Contact: HUO Yan-ying

摘要: 背景与目的: 研究PTEN缺失细胞中活性氧(ROS)水平、DNA氧化损伤和抗氧化能力的变化。 材料与方法: 运用化学/荧光发光分析、免疫细胞化学、中性单细胞凝胶电泳技术,分别比较Pten+/+MEFs与Pten-/-MEFs细胞中ROS、8-羟基脱氧鸟苷(8-OH-dG)水平、DNA双链断裂(DSBs)以及抗氧化能力的差异。 结果: Pten-/-MEFs细胞中ROS、8-OH-dG水平明显增高,DSBs增加,抗氧化能力减弱。 结论: PTEN可能通过调控细胞内ROS水平拮抗DNA氧化损伤。

关键词: PTEN, 活性氧, DNA氧化损伤

Abstract: BACKGROUND AND AIM: To study the variation of the level of reactive oxygen species(ROS), oxidative DNA damage and antioxidative ability between Pten+/+MEFs and Pten-/-MEFs cells. MATERIALS AND METHODS: Fluorescence activated cell sorter(FACS), immunocytochemistry (ICC) and neutral single cell gel electrophoresis(SCGE) were employed to compare the differences of the levels of ROS , 8-hydroxy-2'-deoxyguanosine(8-OH-dG),double-strand breaks(DSBs)and antioxidative ability between Pten+/+MEFs and Pten-/-MEFs cells. RESULTS: In Pten-/-MEFs , the levels of ROS, 8-OH-dG and DSBs were increased. Moreover, its antioxidative ability was decreased. CONCLUSION: PTEN could regulate the level of ROS to affect oxidative DNA damage.

Key words: phosphatase and tensin homolog deleted on chromosome ten, ROS, oxidative DNA damage