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Ovarian cancer has long been considered the second-highest cancer threat to women's reproductive system with high mortality. This is ascribed to the absence of highly efficient therapy and cancer metastasis. Accordingly, there is an urgent need for the development of new agents. Recently, Traditional Chinese medicine has gained extensive interest because of its safe use, validity, and distinct pharmacological effects. Polyphyllin E (PPE), as a major constituent in Rhizoma Paridis, is a promising cancer-fighting agent. However, the effect of PPE on ovarian cancers as well as associated latent mechanisms is still not completely understood. In this study, PPE was found to prohibit the proliferation of SK-OV-3 and OVCAR-3 ovarian cancer cells, causing marked cell death. Additionally, low-dose PPE could also inhibit motility and invasion of ovarian cancer cells. The mechanistic assessment revealed PPE-mediated matrix metalloproteinases, i.e., MMP2 and MMP9, inhibition via the AKT-nuclear factor kappa B (AKT/NF-κB) signaling pathway. Rescue experiments with transfection of AKT lentiviral particles remarkably reversed PPE inhibitory effects against ovarian cancer cells. In conclusion, PPE could inhibit proliferation of ovarian cancer cell migration and invasion by down-regulating the AKT/NF-κB pathway. Moreover, it has the potential to act as a novel agent for ovarian cancer treatment.

Polyphyllin E Inhibits Proliferation, Migration and Invasion of Ovarian Cancer Cells by Down-Regulating the AKT/NF-κB Pathway