RESUMO
Objective: To observe the effects of sorafenib on the proliferation and apoptosis of human non-small cell lung cancer (NSCLC) A549 and H1299 cells and to explore their possible mechanisms. Methods: The A549 and H1299 cells were treated with sorafenib at different concentrations. The inhibitory rate of cell proliferation was assessed by cell counting kit-8 (CCK-8). The apoptosis and the cell cycle distribution were analyzed by flow cytometry (FCM). The expression levels of phosphorylated extracellular signal-regulated kinase (p-ERK) and phosphorylated-Akt (p-Akt) proteins in A549 and H1299 cells were examined by Western blotting. Results: The proliferation of A549 and H1299 cells was inhibited via treatment with different concentrations of sorafenib in a dose-dependent manner (P<0.05). Sorafenib can induce apoptosis. The percentage of cells at G0/G1 phase was significantly increased, and which at S phase was significantly decreased in sorafenib-treated group, as compared with those in the control group (P<0.05). The expression level of p-ERK protein in A549 and H1299 cells treated with sorafenib was lower than that in the untreated control group (P<0.05). Conclusion: Sorafenib can inhibit the proliferation of human NSCLC A549 and H1299 cells and induce the apoptosis. This effect may be associated with the block of ERK signaling pathway. Copyright© 2011 by TUMOR.