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Epithelial-mesenchymal transition (EMT) is a pivotal event in the invasion and metastasis of cancer cells. Prunella vulgaris (PV) inhibits the proliferation of various cancer cells; however, its possible role in EMT has not been demonstrated. In the present study, we explored the effect of PV aqueous extract (PVAE), a typical medicine for decoction, on EMT. Lipopolysaccharide (LPS) induced EMT-like phenotype changes in cancer cell lines that enhanced cell migration and invasion. PVAE markedly inhibited these effects and produced accompanying changes in the expression of EMT markers, including decreased expression of N-cadherin and vimentin, and increased expression of β-catenin. We found that PVAE effects on LPS-induced EMT were mediated by inhibition of the NF-κB/Snail signaling pathway. Our findings provide new evidence that PVAE suppresses cancer invasion and migration by inhibiting EMT. Therefore, we suggest that PVAE is an effective dietary chemopreventive agent with antimetastatic activity against malignant tumors.

oncology reports

Suppression of LPS-induced epithelial-mesenchymal transition by aqueous extracts of Prunella vulgaris through inhibition of the NF-κB/Snail signaling pathway and regulation of EMT-related protein expression