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    Please use this identifier to cite or link to this item: http://asiair.asia.edu.tw/ir/handle/310904400/16502

    Title: The novel quinolone CHM-1 induces DNA damage and inhibits DNA repair gene expressions in a human osterogenic sarcoma cell line
    Authors: 闕甫伈;Chueh, Fu-Shin;鍾景光;Chung, Jing-Gung
    Contributors: 生物科技學系
    Keywords: CHM-1;DNA damage;DNA repair;gene expression;U-2 OS human osteogenic sarcoma cells.
    Date: 2010-10
    Issue Date: 2012-11-23 17:13:56 (UTC+8)
    Abstract: 20-Fluoro-6,7-methylenedioxy-2-phenyl-4-quino-lone (CHM-1) has been reported to induce cell cycle arrest and apoptosis in many types of cancer cells. However, there is no available information to show CHM-1 affecting DNA damage and expression of associated repair genes. Herein, we investigated whether or not CHM-1 induced DNA damage and affected DNA repair gene expression in U-2 OS human osterogenic sarcoma cells. The comet assay showed that incubation of U-2 OS cells with 0, 0.75, 1.5, 3 and 6 μM of CHM-1 led to a longer DNA migration smear (comet tail). DNA gel electrophoresis showed that 3 μM of CHM-1 for 24 and 48 h treatment induced DNA fragmentation in U-2 OS cells. Real-time PCR analysis showed that treatment with 3 μM of CHM-1 for 24 h reduced the mRNA expression levels of ataxia telangiectasia mutated (ATM), ataxia-telangiectasia and Rad3-related (ATR), breast cancer 1, early onset (BRCA1), 14-3-3sigma (14-3-3σ), DNA-dependent serine/threonine protein kinase (DNA-PK) and O(6)-methylguanine-DNA methyltransferase (MGMT) genes in a time-dependent manner. Taken together, the results indicate that CHM-1 caused DNA damage and reduced DNA repair genes in U-2 OS cells, which may be the mechanism for CHM-1-inhibited cell growth and induction of apoptosis.
    Appears in Collections:[生物科技學系] 期刊論文

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