Abstract
Epithelial-mesenchymal transition (EMT) serves an important role in the metastasis of prostate cancer. Juglone is a natural compound isolated from plants that is reported to possess potent cytotoxic properties. However, there are no studies on the anti-EMT effect of juglone in prostate cancer, or its potential underlying mechanisms of action. In the present study, the effect of juglone on the EMT of prostate cancer cells was investigated. Transwell assays were used to demonstrate that juglone inhibits the migration and invasion of the prostate cancer (PC) LNCaP and LNCaP-AI cell lines. Results from western blot analysis demonstrated that juglone increases the expression of the epithelial marker E-cadherin while decreasing the expression of mesenchymal markers (N-cadherin and Vimentin) in a dose-dependent manner. The data from the present study also revealed that juglone downregulates the expression of Snail, a repressor of E-cadherin and an inducer of EMT. Furthermore, juglone prevented inactivation of glycogen synthase kinase-3β (GSK-3β), an endogenous inhibitor of Snail in a dose-dependent manner. Lithium chloride (LiCl), a GSK-3β inhibitor, prevented juglone-mediated downregulation of Snail expression and upregulation of E-c...Continue Reading
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