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The hepatitis C virus persistence: how to evade the immune system?

Nicole Pavio1, Michael M C Lai

  • 1Department of Molecular Microbiology, University of Southern California, Keck School of Medicine, Los Angeles, CA 90033, USA.

Journal of Biosciences
|May 8, 2003
PubMed

Insights

Hepatitis C virus (HCV) infections often become chronic, leading to severe liver disease. This review details how HCV evades the immune system, aiding persistent infection and informing new therapeutic strategies.

Area of Science:

  • Virology
  • Immunology
  • Hepatology

Background:

  • Hepatitis C virus (HCV) causes chronic infections, leading to liver cirrhosis and cancer.
  • HCV frequently establishes persistent infections despite robust host immune responses.
  • Viral quasispecies evolution and protein interference are key to immune evasion.

Purpose of the Study:

  • To review the diverse strategies employed by Hepatitis C virus to counteract host immune responses.
  • To elucidate the mechanisms by which HCV establishes and maintains chronic infection.
  • To identify potential therapeutic targets based on a deeper understanding of viral immune evasion.

Main Methods:

  • Review of existing literature on Hepatitis C virus pathogenesis and immunology.
  • Analysis of viral factors contributing to immune escape.
  • Examination of viral protein interactions with host cellular functions and signaling pathways.

Main Results:

  • HCV utilizes evolving quasispecies to select for immune escape mutants.
  • Viral proteins interfere with host immune response pathways, including interferon signaling.
  • HCV infects and impairs the function of immune cells like B and T cells.

Conclusions:

  • HCV employs multiple sophisticated mechanisms to evade host immune defenses.
  • Understanding these evasion strategies is crucial for developing effective therapies.
  • Targeting viral immune evasion pathways offers promising avenues for new Hepatitis C treatments.

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