中國醫藥大學機構典藏 China Medical University Repository, Taiwan:Item 310903500/29881
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    題名: The application potential of sintered beta-dicalcium pyrophosphate in total joint arthroplasty
    作者: Sun, JS;Tsuang, YH;Lin, FH;Chen, LT;Hang, YS;Liu, HC
    貢獻者: 附設醫院骨科部;Natl Taiwan Univ, Inst Biomed Engn, Taipei 10764, Taiwan;Natl Taiwan Univ Hosp, Dept Biomed Engn, Taipei, Taiwan;Natl Taiwan Univ Hosp, Dept Orthoped Surg, Taipei, Taiwan;China Med Coll Hosp, Dept Orthoped Surg, Taichung, Taiwan
    日期: 2003
    上傳時間: 2010-09-24 14:44:39 (UTC+8)
    出版者: CHURCHILL LIVINGSTONE INC MEDICAL PUBLISHERS
    摘要: Phenylacetate is a differentiation agent and has anticancer activity with relatively low toxicity. In the present study, we examined the anticancer effect of six synthetic phenylacetate derivatives in human lung cancer cells in our search for more effective phenylacetate analogous. Results showed that the antiproliferative effects of these synthetic compounds were stronger than those of phenylacetate, and that N-butyl-2-(2-fluorolphenyl)acetamide (SCK6) is the most potent compound. To address the mechanism of the antiproliferative effect of SCK6, cell cycle analysis was performed. Result showed that SCK6 (1 mM) induced G(1) arrest in CH27 cells. Western blot analysis of G, phase regulatory proteins demonstrated that the protein levels of cyclin-dependent kinase 2 (Cdk2), Cdk4, Cyclin E and Cyclin D3 were decreased after treatment with SCK6 but not those of Cdk6, Cyclin D1 and D2. In contrast, SCK6 increased the protein levels of p53 and p21(CIP1/WAF1). Data from in situ terminal transferase-mediated dUTP-fluorescensin nick end-labeling (TUNEL) assay and DNA fragmentation analysis demonstrated that SCK6 induced apoptotic cell death in CH27 cells. This SCK6-induced apoptosis was accompanied by a downregulation of Bcl-2 protein and activation of the caspase-9 cascade. Overexpression of Bcl-2 by adeno-Bcl-2 vector infection significantly inhibited SCK6-induced apoptosis. Moreover, treatment with caspase inhibitors also markedly reduced cell death induced by SCK6. Taken together, these results suggest that downregulation of G(1)-associated Cdks and cyclins and upregulation of p53 and p21(CIP1/WAF1) may contribute to SCK6-mediated G(1)-phase arrest. Furthermore, the decrease in Bcl-2 and the activation of caspase-9/caspase-3 may be the effector mechanism through which SCK6 induces apoptosis. (C) 2003 Elsevier Science B.V. All rights reserved.
    關聯: JOURNAL OF ARTHROPLASTY 18(3):352-360
    顯示於類別:[台中附設醫院] 期刊論文

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