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    標題: Pterostilbene prevents AKT-ERK axis-mediated polymerization of surface fibronectin on suspended lung cancer cells independently of apoptosis and suppresses metastasis
    作者: Wang, Ying-Jan
    Lin, Jing-Fang
    Cheng, Li-Hsin
    Chang, Wen-Tsan
    Kao, Ying-Hsien
    Chang, Ming-Min
    Wang, Bour-Jr
    Cheng, Hung-Chi
    貢獻者: Natl Cheng Kung Univ, Dept Environm & Occupat Hlth
    Natl Cheng Kung Univ, Inst Basic Med Sci, Coll Med
    Natl Cheng Kung Univ, Coll Med, Dept Biochem & Mol Biol
    E Da Hosp, Dept Med Res
    Asia Univ, Dept Biomed Informat
    China Med Univ,China Med Univ Hosp, Dept Med Res
    Taipei Med Univ, Grad Inst Clin Med
    Natl Cheng Kung Univ Hosp, Dept Occupat & Environm Med
    Chia Nan Univ Pharm & Sci, Dept Cosmet Sci
    Chia Nan Univ Pharm & Sci, Inst Cosmet Sci
    關鍵字: Fibronectin
    Pericellular assembly
    Pterostilbene
    Pulmonary localization
    PI3K/AKT/ERK signaling
    日期: 2017-03-21
    上傳時間: 2018-11-30 15:53:24 (UTC+8)
    出版者: Bmc
    摘要: Background: Polymeric fibronectin (polyFN) assembled on suspended breast cancer cells is required for metastasis. Conceivably, drugs that target such polyFN may fight against cancer metastasis. While stilbene analogs trigger proapoptotic effect on attached cancer cells, whether they prevent polyFN assembly and metastasis of suspended cancer cells via an apoptosis-independent manner remains unexplored. Methods: We depleted suspended Lewis lung carcinoma (LLC) cells of polyFN by silencing the endogenous FN expression or pterostilbene (PS) to examine whether metastasis of lung cancer cells could thus be suppressed. We investigated whether PS regulates AKT-ERK signaling axis to suppress polyFN assembly in suspended LLC cells independently of apoptosis. We tested the therapeutic effects of orally administered PS against cancer metastasis. Results: Both FN-silencing and PS among the three stilbenoids indeed significantly reduced polyFN assembly and lung metastasis of suspended LLC cells in an apoptosis-independent manner. Mechanistically, PS-induced AKT phosphorylation (pAKT) and suppressed ERK phosphorylation (pERK) in suspended LLC cells, whereas pretreatment with a PI3K inhibitor, LY294002, effectively reduced pAKT, rescued pERK, and consequently reversed the PS-suppressed polyFN assembly on LLC cells; these pretreatment effects were then overturned by the ERK inhibitor U0126. Indeed, PS-suppressed lung metastasis was counteracted by LY294002, which was further overruled with U0126. Finally, we found that PS, when orally administered in experimental metastasis assays, both significantly prevented lung colonization and metastasis of LLC cells and reduced the already established tumor growth in the mouse lungs. Conclusions: PS suppressed AKT/ERK-regulated polyFN assembly on suspended LLC cells and pulmonary metastasis. PS possesses potency in both preventing and treating lung metastasis of lung cancer cells in apoptosis-independent and apoptosis-dependent manners, respectively.
    關聯: Journal of Hematology & Oncology, v.10, pp.72
    Appears in Collections:[化妝品應用與管理系(所)] 期刊論文

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