Effect of TRAF6 gene silencing on hepatocellular carcinoma cell line SMCC7721 and its possible mechanism  

作　　者：Chuang Ge Yi Qian Dong-Mei Zhu Bin Zhu 

机构地区：[1]Department of hepatobiliary surgery,Nantong First People's Hospital,Second Affiliated Hospital of Nantong University,Nantong 226001,China

出　　处：《Journal of Hainan Medical University》2022年第2期23-27,共5页海南医学院学报（英文版）

基　　金：Scientific Research Project of Health and Family Planning Commission of Nantong(No.MB2020007;QA 2019004)。

摘　　要：Objective:To explore the effect of TRAF6 gene silencing on the function of hepatocellular carcinoma SMCC7721 and its possible mechanism.Method:Cell lines were constructed by cell transfection technology and verified by quantitative real-time PCR.Cell functional changes were observed by CCK8 method,Transwell test and Method of EdU.Western blotting was used to explore the possible mechanism of action.Result:TRAF6 RNA was abnormally up-regulated in HCC,and TRAF6 levels were detected in both HCC cell lines and L02 cells.SMCC7721 was selected as TRAF6 high expression cell.The results of CCK8 assay and EdU method showed that the decrease of TRAF6 expression significantly inhibited the proliferation of SMCC7721 cells.The results of CCK8 assay and EdU method showed that the decrease of TRAF6 expression significantly inhibited the proliferation of SMCC7721 cells.Overexpression of TRAF6 in TRAF6 knockdown cells can restore and enhance cell proliferation.Transwell assay confirmed that the invasiveness of SMCC 7721 cells treated with siRNA was significantly reduced.After treatment with LV-Rescue plasmid,the cell invasion was restored and enhanced.Western blotting showed that the protein levels of YB-1,Wnt,β-catenin,c-myc and Cyclin D1 were significantly down-regulated in siRNA group.On the contrary,the expression level of CYLD protein increased.Conclusion:As an important intracellular junctive protein in tumor cells,TRAF6 may improve the expression of pro-cancer factors C-myc and Cyclin D1 by modifying(ubiquitination)YB-1,thus improving the proliferation ability of cells.This process may be closely positively correlated with the Wnt/β-catenin pathway,and negatively correlated with the expression of CYLD protein.

关 键 词：Hepatocellular carcinoma Tumor necrosis factor receptor-associated factor 6 TRAF6 Y-box binding protein-1 YB-1 Cylindromatosis CYLD 

分 类 号：R73[医药卫生—肿瘤]