EGFRvIII Mediates Hepatocellular Carcinoma Cell Invasion by Promoting S100 Calcium Binding Protein A11 Expression
| Autor: | Zonghai Li, Hailong Xie, Min Zhou, Xiaolan Long, Hua Jiang, Zhibin Xu, Xiaoying Luo, Bizhi Shi |
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| Rok vydání: | 2013 |
| Předmět: |
STAT3 Transcription Factor
Carcinoma Hepatocellular Cell lcsh:Medicine Downregulation and upregulation Cell Line Tumor medicine Humans Neoplasm Invasiveness Epidermal growth factor receptor RNA Small Interfering lcsh:Science Promoter Regions Genetic STAT3 Multidisciplinary biology lcsh:R Liver Neoplasms S100 Proteins Cell migration Transfection Tyrphostins digestive system diseases ErbB Receptors Gene Expression Regulation Neoplastic medicine.anatomical_structure Cell culture Mutation biology.protein Cancer research lcsh:Q Signal transduction Signal Transduction Research Article |
| Zdroj: | PLoS ONE PLoS ONE, Vol 8, Iss 12, p e83332 (2013) |
| ISSN: | 1932-6203 |
| DOI: | 10.1371/journal.pone.0083332 |
| Popis: | Epidermal growth factor receptor (EGFR) is frequently aberrantly expressed in cancer, and abnormal signalling downstream of this receptor contributes to tumour growth. EGFR variant III (EGFRvIII) is the most commonly altered form of EGFR and contains a truncated ligand-binding domain. Aberrant signalling downstream of this receptor contributes to tumour invasion. We previously reported that EGFRvIII can promote hepatocellular carcinoma (HCC) invasion. However, little is known concerning the mechanisms underlying EGFRvIII-mediated increases in cell motility and invasion in HCC. In this study, we observed that S100A11 was significantly upregulated in Huh-7 cells that overexpressed EGFRvIII. Moreover, S100A11 expression was elevated in HCC tissue samples (68.6%; 35/51), and this elevation was correlated with EGFRvIII expression (p = 0.0020; n = 20). Furthermore, the overexpression of S100A11 can promote HCC cell invasiveness, whereas siRNA against S100A11 can suppress the invasiveness of HCC cells stably transfected with EGFRvIII. Additionally, STAT3 inhibitors can block S100A11 expression and S100A11 promoter activity in HCC cells with stable overexpression of EGFRvIII. Furthermore, mutation in STATx binding sites could abolish the S1000A11 promoter activity stimulation by EGFRvIII. Taken together, the results demonstrate that the EGFRvIII-STAT3 pathway promotes cell migration and invasion by upregulating S100A11. |
| Databáze: | OpenAIRE |
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