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    Please use this identifier to cite or link to this item: http://ir.cnu.edu.tw/handle/310902800/27951


    標題: Tomatidine inhibits invasion of human lung adenocarcinoma cell A549 by reducing matrix metalloproteinases expression
    作者: Yan, Kun-Huang
    Lee, Liang-Ming
    Yan, Shao-Han
    Huang, Hsiang-Ching
    Li, Chia-Chen
    Lin, Hui-Ting
    Chen, Pin-Shern
    貢獻者: 生物科技系
    關鍵字: Tomatidine
    Invasion
    Matrix Metalloproteinase
    日期: 2013-05
    上傳時間: 2014-05-26 10:50:21 (UTC+8)
    出版者: Elsevier Ireland Ltd
    摘要: Tomatidine is an aglycone of glycoalkaloid tomatine in tomato. Tomatidine is found to possess anti-inflammatory properties and may serve as a chemosensitizer in multidrug-resistant tumor cells. However, the effect of tomatidine on cancer cell metastasis remains unclear. This study examines the effect of tomatidine on the migration and invasion of human lung adenocarcinoma A549 cell in vitro. The data demonstrates that tomatidine does not effectively inhibit the viability of A549 cells. When treated with non-toxic doses of tomatidine, cell invasion is markedly suppressed by Boyden chamber invasion assay, while cell migration is not affected. Tomatidine reduces the mRNA level of matrix metalloproteinase-2 (MMP-2), MMP-9 and increases the expression of reversion-inducing cysteine-rich protein with kazal motifs (RECK), as well as tissue inhibitor of metalloproteinase-1 (TIMP-1). The immunoblotting assays indicate that tomatidine is very effective in suppressing the phosphorylation of Akt and extracellular signal regulating kinase (ERK). In addition, tomatidine significantly decreases the nuclear level of nuclear factor kappa B (NF-kappa B), which suggests that tomatidine inhibits NF-kappa B activity. Furthermore, the treatment of inhibitors specific for PI3K/Akt (LY294002), ERK (U0126), or NF-kappa B (pyrrolidine dithiocarbamate) to A549 cells reduced cell invasion and MMP-2/9 expression. The results suggest that tomatidine inhibits the invasion of A549 cells by reducing the expression of MMPs. It also inhibits ERK and Akt signaling pathways and NF-kappa B activity. These findings demonstrate a new therapeutic potential for tomatidine in anti-metastatic therapy. (C) 2013 Elsevier Ireland Ltd. All rights reserved.
    Appears in Collections:[生物科技系(所)] 期刊論文

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