RNAa-mediated overexpression of WT1 induces apoptosis in HepG2 cells

World Journal of Surgical Oncology

Research

Shou-Jiang Huang¹  Zheng-Yan Zhao¹  Qi Qin¹  Qi-Qi Mao²  Xiang-Yi Zheng²  Hong Chen²  Kai Yang²  Yi-Wei Lin² 

[1] Department of General Surgery, Children Hospital, Zhejiang University School of Medicine, 310006, Hangzhou, China;Department of Urology, the First Affiliated Hospital, Zhejiang University School of Medicine, 310003, Hangzhou, China;

关键词: WT1;    Small activating RNA;    dsRNA;    Hepatocellular carcinoma;    HepG2 cell;    Apoptosis;   

DOI  :  10.1186/1477-7819-10-11

 received in 2011-10-02, accepted in 2012-01-13,  发布年份 2012

来源: Springer

【 摘 要 】

AimRecent studies have reported that double-stranded RNA (dsRNA) can activate gene expression by targeting promoter sequence in a process termed RNA activation. The present study was conducted to evaluate the potential of WT1 induction by small activating RNA targeting the WT1 promoter (dsWT1) in the treatment of hepatocellular carcinoma.MethodsThe human hepatocellular carcinoma cell line HepG2 was transfected with dsRNA by liposomes. The expression of mRNA and protein in cells were investigated using real-time reverse real-time quantitative PCR and Western blot, respectively. Cell viability and clonogenicity were determined by MTT assay and clonogenicity assay, respectively. Cell apoptosis was evaluated by flow-cytometric analysis.ResultsExpressions of WT1 mRNA and protein in dsWT1 treated HepG2 cells were significantly elevated. Inhibition of cell viability by dsWT1 was dose-dependent and time-dependent. Reduction of the number and size of colonies formed were found in dsWT1 treated cells. dsWT1 induced significant apoptosis in HepG2 cells. The decreased anti-apoptotic protein Bcl-2 and elevated pro-apoptotic protein Bak expression were detected in dsWT1 treated cells. The level of pro-caspase-3 remarkably decreased and cleaved caspase-3 and PARP fragment were also detected in dsWT1 treated cells.ConclusionThese data show that RNAa-mediated overexpression of WT1 may have therapeutic potential in the treatment of hepatocellular carcinoma.

【 授权许可】

Unknown   
© Qin et al; licensee BioMed Central Ltd. 2012. This article is published under license to BioMed Central Ltd. This is an Open Access article distributed under the terms of the Creative Commons Attribution License (http://creativecommons.org/licenses/by/2.0), which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.