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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...
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...
Cell-mediated Immune Responses01:40

Cell-mediated Immune Responses

Overview
Retrovirus Life Cycles01:10

Retrovirus Life Cycles

Retroviruses have a single-stranded RNA genome that undergoes a special form of replication. Once the retrovirus has entered the host cell, an enzyme called reverse transcriptase synthesizes double-stranded DNA from the retroviral RNA genome. This DNA copy of the genome is then integrated into the host’s genome inside the nucleus via an enzyme called integrase. Consequently, the retroviral genome is transcribed into RNA whenever the host’s genome is transcribed, allowing the retrovirus to...
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...

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Related Experiment Video

Updated: Jun 7, 2026

Stem Cell-Derived Viral Ag-Specific T Lymphocytes Suppress HBV Replication in Mice
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Stem Cell-Derived Viral Ag-Specific T Lymphocytes Suppress HBV Replication in Mice

Published on: September 25, 2019

Adaptive immunity to the hepatitis C virus.

Christopher M Walker1

  • 1Research Institute at Nationwide Children’s Hospital, Columbus, Ohio, USA.

Advances in Virus Research
|November 3, 2010
PubMed
Summary

Hepatitis C virus (HCV) persistence is a major health issue. This review examines how the immune system fights HCV and how the virus evades these defenses to cause chronic liver disease.

Area of Science:

  • Virology
  • Immunology
  • Hepatology

Background:

  • Hepatitis C virus (HCV) affects 2% of the global population.
  • Over 70% of infections lead to chronic liver disease, including cirrhosis and cancer.
  • Spontaneous viral clearance occurs in less than 30% of cases, conferring immunity.

Purpose of the Study:

  • To review the role of humoral and cellular immunity in preventing HCV persistence.
  • To examine the mechanisms by which HCV evades host immune responses.

Main Methods:

  • Literature review of studies on HCV immunology and viral evasion strategies.
  • Analysis of adaptive immune responses (humoral and cellular) in HCV infection.
  • Examination of viral mechanisms for immune subversion.

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Analysis of HBV-Specific CD4 T-cell Responses and Identification of HLA-DR-Restricted CD4 T-Cell Epitopes Based on a Peptide Matrix
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Analysis of HBV-Specific CD4 T-cell Responses and Identification of HLA-DR-Restricted CD4 T-Cell Epitopes Based on a Peptide Matrix

Published on: October 20, 2021

Two Methods of Heterokaryon Formation to Discover HCV Restriction Factors
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Two Methods of Heterokaryon Formation to Discover HCV Restriction Factors

Published on: July 16, 2012

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Last Updated: Jun 7, 2026

Stem Cell-Derived Viral Ag-Specific T Lymphocytes Suppress HBV Replication in Mice
07:25

Stem Cell-Derived Viral Ag-Specific T Lymphocytes Suppress HBV Replication in Mice

Published on: September 25, 2019

Analysis of HBV-Specific CD4 T-cell Responses and Identification of HLA-DR-Restricted CD4 T-Cell Epitopes Based on a Peptide Matrix
10:37

Analysis of HBV-Specific CD4 T-cell Responses and Identification of HLA-DR-Restricted CD4 T-Cell Epitopes Based on a Peptide Matrix

Published on: October 20, 2021

Two Methods of Heterokaryon Formation to Discover HCV Restriction Factors
16:49

Two Methods of Heterokaryon Formation to Discover HCV Restriction Factors

Published on: July 16, 2012

Main Results:

  • Adaptive immunity is crucial for controlling HCV replication and preventing persistence.
  • HCV employs sophisticated mechanisms to evade both antibody-mediated (humoral) and T-cell-mediated (cellular) immunity.
  • Successful viral evasion leads to chronic infection and increased risk of liver disease.

Conclusions:

  • Understanding HCV immune evasion is key to developing effective therapies and vaccines.
  • Targeting viral evasion mechanisms could enhance immune control of HCV.
  • Further research into host-pathogen interactions is vital for combating HCV persistence.