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RNAa-mediated overexpression of WT1 induces apoptosis in HepG2 cells

Qi Qin1, Yi-Wei Lin, Xiang-Yi Zheng

  • 1Department of General Surgery, Children Hospital, Zhejiang University School of Medicine, Hangzhou 310006, China.

World Journal of Surgical Oncology
|January 17, 2012
PubMed
Abstract

Insights

Small activating RNA targeting the WT1 promoter (dsWT1) effectively induced WT1 expression in hepatocellular carcinoma cells. This RNA activation strategy demonstrated therapeutic potential by inhibiting cell viability and inducing apoptosis.

Area of Science:

  • Molecular Biology
  • Cancer Research
  • RNA Therapeutics

Background:

  • Double-stranded RNA (dsRNA) activates gene expression via promoter targeting, a process known as RNA activation (RNAa).
  • The Wilms' tumor 1 (WT1) gene plays a role in various cancers, including hepatocellular carcinoma (HCC).

Purpose of the Study:

  • To investigate the therapeutic potential of WT1 induction using small activating RNA targeting the WT1 promoter (dsWT1) in HCC.
  • To evaluate the efficacy of dsWT1 in modulating WT1 expression and its effects on HCC cell behavior.

Main Methods:

  • Human HCC cell line (HepG2) was transfected with dsWT1 using liposomes.
  • WT1 mRNA and protein expression were quantified using qRT-PCR and Western blot.
  • Cell viability, clonogenicity, and apoptosis were assessed using MTT, clonogenicity assays, and flow cytometry.

Main Results:

  • dsWT1 significantly increased WT1 mRNA and protein expression in HepG2 cells.
  • dsWT1 exhibited dose- and time-dependent inhibition of cell viability and reduced colony formation.
  • dsWT1 induced significant apoptosis, evidenced by altered expression of Bcl-2, Bak, caspase-3, and PARP.

Conclusions:

  • RNAa-mediated WT1 overexpression via dsWT1 shows promise as a therapeutic strategy for hepatocellular carcinoma.
  • Further research into dsWT1 could lead to novel treatments for HCC.

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