RRC ID 45307
Author Hsieh SC, Tsai JP, Yang SF, Tang MJ, Hsieh YH.
Title Metformin inhibits the invasion of human hepatocellular carcinoma cells and enhances the chemosensitivity to sorafenib through a downregulation of the ERK/JNK-mediated NF-κB-dependent pathway that reduces uPA and MMP-9 expression.
Journal Amino Acids
Abstract Metformin has been shown to exert anti-cancer activities in several cancer cells and animal models. However, the molecular mechanisms of its anti-metastatic activities remain poorly understood and warrant further investigation. The aims of this study were to evaluate the ability of metformin to inhibit the migration and invasion of hepatocellular carcinoma (HCC) cells and identify its effects on signaling pathways. Our data indicate that metformin inhibits the migration and invasion of human HCC cells. Metformin was also found to significantly inhibit the expression and secretion of MMP-9 and uPA in HCC cells, and suppress the phosphorylation of ERK1/2 and JNK1/2. Treatment with an ERK1/2 inhibitor (PD98059) or JNK1/2 inhibitor (SP600125) enhanced the inhibitory effects of metformin on the migration and invasion of HCC cells. Moreover, metformin-induced inhibition of MMP-9 and uPA promoter activity also blocked the nuclear translocation of NF-κB and its binding to the MMP-9 and uPA promoters, and these suppressive effects were further enhanced by PD98059 or SP600125. Moreover, metformin markedly enhanced the anti-metastatic effects of sorafenib. In conclusion, metformin inhibits the migration and invasion of HCC cells by suppressing the ERK/JNK-mediated NF-κB-dependent pathway, and thereby reducing uPA and MMP-9 expression. Additionally, combination treatment with metformin and sorafenib yielded synergistic inhibitory effects in suppressing cell migration and invasion of HCC cells. These findings provide insight into the molecular mechanisms involved in the anti-metastatic effects of metformin, as well as its ability to enhance the chemosensitivity of HCC cells to sorafenib.
Volume 46(12)
Pages 2809-22
Published 2014-12
DOI 10.1007/s00726-014-1838-4
PMID 25245054
MeSH Carcinoma, Hepatocellular / drug therapy Carcinoma, Hepatocellular / genetics* Carcinoma, Hepatocellular / metabolism Carcinoma, Hepatocellular / pathology Cell Line, Tumor Cell Movement / drug effects Extracellular Signal-Regulated MAP Kinases / genetics Extracellular Signal-Regulated MAP Kinases / metabolism Gene Expression Regulation, Neoplastic / drug effects Humans Liver Neoplasms / drug therapy Liver Neoplasms / genetics* Liver Neoplasms / metabolism Liver Neoplasms / pathology MAP Kinase Kinase 4 / genetics MAP Kinase Kinase 4 / metabolism Matrix Metalloproteinase 9 / genetics* Matrix Metalloproteinase 9 / metabolism Metformin / pharmacology* NF-kappa B / genetics NF-kappa B / metabolism* Neoplasm Invasiveness Niacinamide / analogs & derivatives* Niacinamide / pharmacology Phenylurea Compounds / pharmacology* Signal Transduction / drug effects Sorafenib Urokinase-Type Plasminogen Activator / genetics* Urokinase-Type Plasminogen Activator / metabolism
IF 2.52
Times Cited 24
Human and Animal Cells