Background: Baicalein is an important Chinese herbal medicine and has multiple pharmacological activities. However, the biological mechanisms of the anti-tumor effects of Baicalein on non small cell lung cancer (NSCLC) still need to be understood.
Methods: Human NSCLC A549 and H1299 cells were pretreated with Baicalein or DMSO. Cells viability and transwell cell invasion assays were performed to assess cell proliferation and invasion. QRT-PCR assay was used to analyze mRNA expression levels of Twist1, E-cadhertin, Vimentin, Notch1 and hes-1. Western blot analysis was also performed to determine protein expression.
Results: In the study, we found that Baicalein had a significantly inhibited effect on proliferation ability of A549 and H1299 cells. Cells treated with Baicalein showed a down-regulated expression of CyclinD1 and CDK1 in A549 and H1299 cells. Furthermore, we found that Baicalein significantly inhibited cell invasion and Epithelial-Mesenchymal Transition (EMT) by up-regulating the mRNA and protein expression of E-cadherin and down-regulated the Twist1 and Vimentin expression, Moreover, Treatment of Baicalein down-regulated Notch1 and hes-1 expression in A549 and H1299 cells, which indicated that Baicalein could suppress the Notch signaling pathway.
Conclusion: Our studies suggest that Baicalein may be a potential phytochemical flavonoid for therapeutics of NSCLC and serve as a molecular target for NSCLC.
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