Abstract
Invasiveness and epithelial-mesenchymal transition (EMT) are main patterns of metastatic disease, which is the major cause cancer-related mortality in human malignant melanoma cells. Tea and its consumption extract are associated with a lower risk of several types of cancer and have anti-inflammatory and antioxidative biological effects. However, the anti-EMT and anti-cancer stemness effect of black tea ethanol extracts (BTEE) in human melanoma remain poorly understood. In this study, the effects of BTEE-reduced invasiveness, EMT, and cancer stemness were evaluated in human A 375 and A2058 melanoma cells. BTEE inhibited the activity of u-PA, migration, and invasiveness by repressing p-FAK signaling pathway. BTEE affected the EMT by downregulating the expression of β-catenin, N-cadherin, fibronectin, vimentin, and Twist-1. BTEE also reduced tumor necrosis factor-alpha (TNF-α)-induced invasiveness and cancer stemness characteristics in vitro. The growth of melanoma in nude mice xenograft model showed that BTEE suppressed A 375 tumor growth in vivo.
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