CpG oligonucleotides suppress HepG2 cells-induced Jurkat cell apoptosis via the Fas-FasL-mediated pathway

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Jianfeng Zheng1, Rongquan Fu, Jing Li

  • 1Department of Clinical Laboratory, the Second Affiliated hospital of Nanchang University, Nanchang 330006, China.

Journal of Experimental & Clinical Cancer Research : CR
|May 4, 2011
PubMed
Abstract

Insights

CpG oligonucleotides (CpG-ODN) inhibit liver cancer cell-mediated apoptosis by downregulating FasL and Fas expression. This suggests CpG-ODN may be a potential therapeutic for hepatocellular carcinoma (HCC).

Area of Science:

  • Immunology
  • Hepatology
  • Molecular Biology

Background:

  • CpG motif-containing oligonucleotides (CpG-ODN) are known immune modulators.
  • The Fas/FasL pathway plays a critical role in apoptosis.
  • Hepatocellular carcinoma (HCC) involves complex cellular interactions and apoptosis resistance.

Purpose of the Study:

  • To investigate the effect of CpG-ODN on FasL expression in HepG2 cells and Fas expression in Jurkat cells.
  • To determine if CpG-ODN modulates HepG2 cell-mediated apoptosis of Jurkat cells in vitro.
  • To explore the potential of CpG-ODN as a therapeutic agent for HCC.

Main Methods:

  • Real-time PCR and flow cytometry (FCM) were used to assess FasL and Fas expression.
  • HepG2 and Jurkat cells were co-cultured to evaluate apoptosis.
  • FCM was employed to quantify apoptotic Jurkat cells and activated caspase-3 levels.

Main Results:

  • CpG-ODN dose- and time-dependently downregulated FasL in HepG2 cells.
  • CpG-ODN reduced Fas mRNA and protein expression in Jurkat cells.
  • CpG-ODN treatment significantly decreased HepG2-mediated Jurkat cell apoptosis and caspase-3 activation.

Conclusions:

  • CpG-ODN inhibits HepG2 cell-mediated Jurkat cell apoptosis via modulation of the Fas/FasL pathway.
  • CpG-ODN demonstrates potential as a therapeutic reagent for hepatocellular carcinoma (HCC).
  • Targeting the Fas/FasL pathway with CpG-ODN offers a novel strategy for HCC treatment.

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