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    題名: Regulation of a novel cell diffrentiation-associated gene, JWA during oxidative damage in K562 and MCF-7 cells
    作者: 張竣維;Hebron, C.Chang
    貢獻者: 生物科技學系
    關鍵詞: Clinical findings;Intracranial vertebral artery;Magnetic Resonance Angiograph
    日期: 2011
    上傳時間: 2012-11-23 17:09:54 (UTC+8)
    摘要: Oxidative stress, or the production of oxygen-centered free radicals, has been hypothesized as the major source of DNA damage that can lead to a variety of diseases including cancer. It is known that 8-hydroxy-deoxyguanosine (8-oxo-dG) is a useful biomarker of oxidative DNA damage. Our recent data showed that JWA, initially being cloned as a novel cell differentiation-associated gene, was also actively responsive to environmental stressors, such as heat-shock, oxidative stress and so on. In the present study, we have applied a modified comet assay and bacterial repair endonucleases system (endonuclease III and formamidopyrimidine glycosylase) to investigate if JWA is involved in hydrogen peroxide (H2O2)-induced DNA damage and repair in K562 and MCF-7 cells, and to demonstrate if the damage is associated with 8-oxo-dG. The results from the comet assay have shown that the average tail length and the percentage of the cells with DNA tails are greatly induced by H2O2 treatment and further significantly enhanced by the post-treatment of repair endonucleases. The H2O2-induced 8-oxo-dG formation in K562 and MCF-7 cells is dose-dependent. In addition, the data have clearly demonstrated that JWA gene expression is actively induced by H2O2 treatment in K562 and MCF-7 cells. The results suggest that JWA can be regulated by oxidative stress and is actively involved in the signal pathways of oxidative stress in the cells.
    顯示於類別:[生物科技學系] 期刊論文


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