Carcinogenesis, Teratogenesis & Mutagenesis ›› 2008, Vol. 20 ›› Issue (1): 6-010.doi: 10.3969/j.issn.1004-616x.2008.01.002

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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

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