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  • Title: Shikonin as an inhibitor of the LPS-induced epithelial-to-mesenchymal transition in human breast cancer cells.
    Author: Hong D, Jang SY, Jang EH, Jung B, Cho IH, Park MJ, Jeong SY, Kim JH.
    Journal: Int J Mol Med; 2015 Dec; 36(6):1601-6. PubMed ID: 26498588.
    Abstract:
    Shikonin (SK), a natural naphthoquinone isolated from the Chinese medicinal herb, has been known to suppress the proliferation of several cancer cells. However, its role in the epithelial mesenchymal transition (EMT) has yet to be demonstrated. The aim of the present study was to examine the effects of SK on EMT. Lipopolysaccharide (LPS) induced EMT-like phenotypic changes, enhancing cell migration and invasion. SK markedly reduced the expression of the LPS-induced EMT markers, including N-cadherin in MDA-MB‑231 cells, and increased the expression of E-cadherin in MCF-7 cells. SK also inhibited cell migration and invasion in vitro. The effects of SK on the LPS-induced EMT were mediated by the inactivation of the NF-κB-Snail signaling pathway. The results provided new evidence that SK suppresses breast cancer cell invasion and migration by inhibiting the EMT. Therefore, SK is a potentially effective anticancer agent for breast tumors, by inhibiting metastasis.
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