Related Experiment Video

Updated: Jun 20, 2026

Dissecting Innate Immune Signaling in Viral Evasion of Cytokine Production
08:32

Dissecting Innate Immune Signaling in Viral Evasion of Cytokine Production

Published on: March 2, 2014

Intracellular innate immune cascades and interferon defenses that control hepatitis C virus

Stacy M Horner1, Michael Gale

  • 1Department of Immunology, University of Washington School of Medicine, Seattle, Washington 98195, USA.

Journal of Interferon & Cytokine Research : the Official Journal of the International Society for Interferon and Cytokine Research
|August 28, 2009
PubMed

Insights

Hepatitis C virus (HCV) evades the host immune system by suppressing the RIG-I pathway and interferon production. Understanding these viral evasion strategies is key to developing new therapies that reactivate the immune response against chronic HCV infection.

Area of Science:

  • Hepatology
  • Virology
  • Immunology

Background:

  • Hepatitis C virus (HCV) causes chronic infection in nearly 200 million people globally.
  • HCV establishes persistent infections due to host immune system inefficiencies and viral evasion tactics.
  • HCV evades innate immunity by suppressing the RIG-I pathway and interferon production in hepatocytes.

Purpose of the Study:

  • To review the virus and host factors regulating the RIG-I pathway during HCV infection.
  • To elucidate mechanisms of HCV immune evasion.
  • To identify potential therapeutic targets for reactivating host immunity against HCV.

Main Methods:

  • Literature review of viral and host interactions.
  • Analysis of immune evasion strategies employed by HCV.
  • Examination of the RIG-I signaling pathway in the context of HCV infection.

Main Results:

  • HCV actively suppresses the RIG-I pathway, a critical component of innate antiviral immunity.
  • Suppression of RIG-I and subsequent interferon production facilitates viral persistence.
  • HCV employs specific evasion strategies to counteract host defenses within infected cells.

Conclusions:

  • Understanding HCV's regulation of the RIG-I pathway is crucial for combating chronic infection.
  • Targeting HCV-host interactions offers a promising avenue for novel therapeutic strategies.
  • Reactivating the host immune response holds potential for effective HCV treatment.

More Related Videos

Two Methods of Heterokaryon Formation to Discover HCV Restriction Factors16:49

Two Methods of Heterokaryon Formation to Discover HCV Restriction Factors

Published on: July 16, 2012

High-throughput Quantitative Real-time RT-PCR Assay for Determining Expression Profiles of Types I and III Interferon Subtypes10:00

High-throughput Quantitative Real-time RT-PCR Assay for Determining Expression Profiles of Types I and III Interferon Subtypes

Published on: March 24, 2015

Related Concept Videos

Hepatitis01:25

Hepatitis

Hepatitis is an inflammatory condition of the liver most commonly caused by hepatotropic viruses (A–E), though non-infectious causes such as alcohol and drugs also exist.Hepatitis AHepatitis A virus (HAV) is a non-enveloped RNA virus of the Picornaviridae family. It is primarily transmitted via the fecal-oral route, typically through ingestion of contaminated food or water. After ingestion, HAV enters the bloodstream through the oropharynx or intestinal epithelium and reaches the liver. The...
Immune Response Against Viral Pathogens01:29

Immune Response Against Viral Pathogens

The immune system's response to viral infections is a complex and coordinated process involving natural killer (NK) cells, T cell-mediated responses, and antibody-mediated responses.
NK Cells
NK cells are a crucial part of our innate immune system, acting as the first line of defense against viral infections. These cells can recognize and kill infected cells without prior exposure to the virus, effectively slowing down the spread of infection. Additionally, NK cells produce proinflammatory...
Inhibitors of Viral Protein Synthesis01:30

Inhibitors of Viral Protein Synthesis

Protein synthesis is indispensable for viral replication, as viruses lack the cellular machinery required for this process and must hijack the host's translational apparatus. In response, host cells deploy a critical innate immune defense involving interferons, specialized cytokines that play a central role in inhibiting viral propagation.Upon viral detection, infected cells release interferons that bind to receptors on adjacent uninfected cells, activating the JAK-STAT signaling pathway and...
Viral Hepatitis I: Introduction01:28

Viral Hepatitis I: Introduction

Viral hepatitis is an inflammatory condition of the liver caused by infection with hepatotropic viruses, most commonly hepatitis A, B, C, D, and E. Despite variations in structure and transmission, all viruses mentioned infect hepatocytes and provoke immune responses that can hinder liver function. Additionally, some non-hepatotropic viruses can also lead to hepatic inflammation.Hepatitis A VirusHepatitis A virus (HAV) is transmitted through the fecal–oral route, typically by ingestion of food...
Viruses with RNA Genomes01:29

Viruses with RNA Genomes

RNA viruses are categorized into positive-strand, negative-strand, or double-stranded groups based on their genomic structure and replication mechanisms. This classification dictates how they exploit host cellular machinery for protein synthesis and replication. Some RNA viruses also utilize reverse transcription as part of their life cycle, further diversifying their replication strategies.Positive-Strand RNA VirusesPositive-strand RNA viruses have genomes that function directly as messenger...
Cytotoxic T Cells-mediated Immune Response01:27

Cytotoxic T Cells-mediated Immune Response

Cytotoxic T cells are a vital component of the immune system. They have the remarkable ability to identify and target antigens on infected or abnormal cells. These antigens often originate from intracellular pathogens such as viruses or abnormal proteins cancer cells produce.
Immunological surveillance is the ability of immune cells to monitor and eliminate infected cells with intracellular pathogens, neoplastically transformed cells, and cells with non-self antigens. Cytotoxic T cells and NK...