Resveratrol Inhibits EGF-induced Invasion of Human Lung Adenocarcinoma A549 Cells

Abstract

Background and objective Invasion and metastasis are the primary causes of death in patients with pulmonary carcinoma. The epidermal growth factor (EGF) stimulates A549 cells invasion greatly through activating ERK and PI3K-Akt signaling pathway. The aim of this study is to elucidate the inhibitory effect of Resveratrol on EGF-induced invasive ability of A549 cells in vitro and explore the molecular mechanism. Methods The cytotoxicity of Resveratrol was evaluated by methyl thiazolyltetrazolium (MTT) assay. Then, the A549 cells were treated with EGF and non-cytotoxic concentration of Resveratrol. The cells’ invasion were detected by Boyden chamber assay; MMP-2 activity was determined by gelatine zymography assay; the changes of the related proteins were detected by Western blot. Results Resveratrol was not toxic to A549 cells at the concentration between 0 to 30 μM. The invasion ability of EGF-induced A549 cells was decreased after treatment with 20 μM resveratrol for 24 h, accompanied by the inhibition of MMP-2 secretion. And the levels of p-ERK1/2, PI3K (within 6 h) were suppressed too. Conclusion 20 μM Resveratrol inhibits A549 cells’ invasion possibly through the suppression of the activation of ERK and PI3K-Akt signaling pathways, subsequently exerting inhibitory effect on MMP-2.

Keywords

• Resveratrol
• ERK1/2 (extracellular signal regulated kinase 1/2)
• PI3K (phosphatidyl inositol 3-kinase)