text: Inhibition of EGF/EGFR activation with naphtho[1,2-b]furan-4,5-dione blocks migration and invasion of MDA-MB-231 cells.
  Naphtho[1,2-b]furan-4,5-dione (NFD), a bioactive component of Avicennia marina, has been demonstrated to display anti-cancer activity. Activation of epidermal growth factor receptor (EGFR)-induced signaling pathway has been correlated with cancer metastasis in various tumors, including breast carcinoma. We use EGF as a metastatic inducer of MDA-MB-231 cells to investigate the effect of NFD on cell migration and invasion. NFD suppressed EGF-mediated protein levels of c-Jun and c-Fos, and reduced MMP-9 expression and activity, concomitantly with a marked inhibition on cell migration and invasion without obvious cellular cytotoxicity. NFD abrogated EGF-induced phosphorylation of EGF receptor (EGFR) and phosphatidylinositol 3-kinase (PI3K)/Akt. The specific PI3K inhibitor, wortmannin, blocked significantly EGF-induced cell migration and invasion. Furthermore, the EGFR inhibitor AG1478 inhibited EGF-induced MMP-9 expression, cell migration and invasion, as well as the activation of PI3K/Akt, suggesting that PI3K/Akt activation occur downstream of EGFR activation. These findings suggest that NFD inhibited the EGF-induced invasion and migration of MDA-MB-231 cells via EGFR-dependent PI3K/Akt signaling, leading to the down-regulation of MMP-9 expression. These results provide a novel mechanism to explain the role of NFD as a potent anti-metastatic agent in MDA-MB-231 cells.
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entities.type: CHEMICAL CHEMICAL GENE-N GENE-N GENE-Y GENE-Y GENE-Y GENE-N GENE-N GENE-Y CHEMICAL GENE-Y GENE-Y GENE-Y GENE-Y GENE-Y GENE-Y GENE-Y GENE-Y GENE-Y GENE-Y CHEMICAL GENE-N GENE-N GENE-N GENE-N GENE-Y GENE-Y GENE-Y GENE-Y GENE-N GENE-N CHEMICAL GENE-Y GENE-Y CHEMICAL CHEMICAL CHEMICAL CHEMICAL CHEMICAL CHEMICAL
entities.text: AG1478 naphtho[1,2-b]furan-4,5-dione PI3K Akt EGFR EGF EGFR PI3K Akt MMP-9 Naphtho[1,2-b]furan-4,5-dione epidermal growth factor receptor EGFR EGF EGF c-Jun c-Fos MMP-9 EGF EGF receptor EGFR NFD phosphatidylinositol 3-kinase PI3K Akt PI3K EGF EGFR EGF MMP-9 PI3K Akt NFD EGF EGFR NFD NFD NFD NFD phosphatidylinositol wortmannin