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RNAa-mediated overexpression of WT1 induces apoptosis in HepG2 cells
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RNAa-mediated overexpression of WT1 induces apoptosis in HepG2 cells
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RNAa-mediated overexpression of WT1 induces apoptosis in HepG2 cells
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Journal Article
RNAa-mediated overexpression of WT1 induces apoptosis in HepG2 cells
2012
Overview
Aim
Recent 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.
Methods
The 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.
Results
Expressions 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.
Conclusion
These data show that RNAa-mediated overexpression of WT1 may have therapeutic potential in the treatment of hepatocellular carcinoma.
Publisher
BioMed Central,BioMed Central Ltd,BMC
Subject
/ bcl-2-Associated X Protein - genetics
/ bcl-2-Associated X Protein - metabolism
/ Carcinoma, Hepatocellular - genetics
/ Carcinoma, Hepatocellular - metabolism
/ Carcinoma, Hepatocellular - pathology
/ Cells
/ dsRNA
/ Hepatoma
/ Humans
/ Liver Neoplasms - metabolism
/ Medicine
/ Promoter Regions, Genetic - genetics
/ Proteins
/ Proto-Oncogene Proteins c-bcl-2 - genetics
/ Proto-Oncogene Proteins c-bcl-2 - metabolism
/ Real-Time Polymerase Chain Reaction
/ RNA
/ RNA, Double-Stranded - genetics
/ WT1
