Abstract
BACKGROUND AND OBJECTIVE: Our previous in vivo experiment (paper has been published) has confirmed Feiyanning's regulation effect on epithelial cell markers Alpha-catenin, beta-catenin, E-Cadherin and mesenchymal cell markers N-cadherin, Fibronectin, vimentin. Based on previous study, the objective of this study is to further investigate the expression of epithelial-mesenchymal cell marker gene and protein intervened by Feiyanning in highly metastatic lung cancer cells 95-D in vitro. METHODS: Human highly metastatic lung cancer 95-D cells were treated with different concentrations of Feiyanning in vitro, and then Real-time PCR and Western blot methods were used to detect mRNA and protein expression of epithelial-mesenchymal cell marker factor Alpha-catenin, beta-catenin, E-Cadherin, N-cadherin, Fibronectin and vimentin. RESULTS: Real-time PCR results showed that compared with the control group, Feiyanning at 20% concentration remarkably up-regulated the expression of Alpha-catenin (P<0.05), Feiyanning at 20% and 25% concentrations remarkably up-regulated the expression of E-Cadherin (P<0.05, P<0.01), Feiyanning had no significantly effect on beta-catenin at any concentration, 5% and 10% Feiyanning at 5% and 10% concentrations significantly dow-regulated the expression of mesenchymal cell marker vimentin factor (P<0.01), Feiyanning had no regulatory role on N-cadherin and Fibronectin at any concentration. Western blot results showed that Feiyanning at 5%, 10%, 15%, 20% and 25% concentrations significantly increased E-Cadherin protein expression (P<0.01), but had no regulation effect on Alpha-catenin and beta-catenin protein expression; Feiyanning at 5% and 10% concentrations had a down-regulation effect on N-cadherin and Fibronectin protein expression (P<0.01), and had no regulation effect on vimentin protein expression. CONCLUSION: Feiyanning play a role in inhibiting the adhesion of tumor heterogeneity and the athletic ability by regulating epithelial-mesenchymal cell marker factor expression, and thus inhibit the invasion and metastasis of lung cancer.