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HCV E2 may induce apoptosis of Huh-7 cells via a mitochondrial-related caspase pathway

Hui-Ling Chiou1, Yih-Shou Hsieh, Ming-Ru Hsieh

  • 1School of Medical Laboratory and Biotechnology, Chung Shan Medical University, Taichung, Taiwan, ROC. hlchiou@csmu.edu.tw

Biochemical and Biophysical Research Communications
|May 10, 2006
PubMed
Abstract

Insights

Hepatitis C virus (HCV) E2 protein induces apoptosis, a programmed cell death, in liver cells. This process is caspase-dependent and involves mitochondrial damage, suggesting a mechanism for chronic HCV infection.

Area of Science:

  • Hepatology
  • Virology
  • Cell Biology

Background:

  • Hepatitis C virus (HCV) establishes chronic infections through unclear mechanisms.
  • Understanding HCV pathogenesis is crucial for developing effective treatments.

Purpose of the Study:

  • To investigate the role of the HCV E2 protein in inducing apoptosis.
  • To elucidate the molecular pathways involved in E2-mediated cell death.

Main Methods:

  • Huh-7 cells were transfected with the E2 protein.
  • Apoptosis was assessed using MTT assays, DNA fragmentation assays, and Western blotting.

Main Results:

  • HCV E2 protein induced apoptosis in a time-dependent manner.
  • Caspases 3, 8, and 9 were activated, indicating a caspase-dependent pathway.
  • Mitochondrial pathway involvement was suggested by increased cytochrome c and altered Bcl-2/Bax expression.

Conclusions:

  • HCV E2 protein inhibits cell proliferation by inducing apoptosis.
  • Apoptosis is mediated through a mitochondrial damage-dependent caspase pathway.
  • These findings provide insights into HCV's chronic infection mechanisms.

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