Inhibitory effects of scutellarein on proliferation of human lung cancer A549 cells through ERK and NFκB mediated by the EGFR pathway.
CHINESE JOURNAL OF PHYSIOLOGY(2014)
摘要
High expression levels of cyclooxygenase-2 (COX-2) contribute a strong proliferative ability to human lung cancer cells, and this function is link to the epidermal growth factor receptor (EGFR) pathway, which was mediated by extracellular-signal-regulated kinase (ERK) and nuclear factor kappa B (NF kappa B). In this study, scutellarein, a flavonoid compound, was screened for proliferation inhibition at different concentrations (0, 5, 25 and 50 mu M) at 24 h or 48 h in human lung cancer cell line A549. Results showed that A549 cell proliferation was inhibited by 50 mu M scutellarein treatment in 24 h and 48 h of treatment. The expression levels of phosphorylated EGFR, phosphorylated ERK, phosphorylated NF kappa B and COX-2 were reduced in a dose-dependent manner after 24 h scutellarein treatments at different concentrations. Further, ERK inhibitor U0126 and NF kappa B inhibitor MG132 also inhibited A549 cell proliferation similar to 50 mu M scutellarein treatment from 24 h to 48 h. The experimental results showed that scutellarein could inhibit proliferation of the human lung cancer cell line A549 through ERK and NF-kappa B mediated by the EGFR pathway.
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关键词
cyclooxygenase-2,epidermal growth factor receptor,extracellular-signal-regulated kinase,nuclear factor kappa B,scutellarein
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