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Related Concept Videos

Immune Response Against Viral Pathogens01:29

Immune Response Against Viral Pathogens

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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.
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Hepatitis01:25

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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.
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Inhibitors of Viral Protein Synthesis01:30

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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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Antigens Involved in Adaptive Immunity01:26

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An antigen is any substance the immune system identifies as foreign and potentially harmful to the body, prompting an immune response. Antigens have two functional properties: immunogenicity and reactivity. Immunogenicity is the ability of an antigen to stimulate a specific immune response. At the same time, reactivity describes the antigen's ability to react with the cells and antibodies produced in response to it.
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The human immune system is a complex defense mechanism that protects the body from harmful pathogens and foreign substances. It comprises two crucial components: innate and adaptive immunity.
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Antigen Processing Pathways01:31

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MHC molecules are key players in the immune response, enabling T cells to recognize and respond to specific antigens. They are present on the surface of all nucleated cells in the body and are instrumental in presenting antigens to T cells and activating them. T cells recognize the MHC-antigen complex and initiate an immune response. MHC class I and MHC class II are two main types of MHC molecules, each associated with a distinct antigen processing pathway.
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Related Experiment Video

Updated: Apr 17, 2026

Two Methods of Heterokaryon Formation to Discover HCV Restriction Factors
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Innate and adaptive genetic pathways in HCV infection.

R Buchanan1, T Hydes, S I Khakoo

  • 1Clinical and Experimental Sciences, Faculty of Medicine, University of Southampton, Southampton, UK.

Tissue Antigens
|February 25, 2015
PubMed
Summary
This summary is machine-generated.

Host immune responses and genetic factors significantly influence hepatitis C virus (HCV) infection outcomes. Innate immunity, particularly IFNL3/4 gene variants, plays a dominant role in treatment response and disease progression.

Keywords:
hepatitis Cimmunity, adaptiveimmunity, innateinterferoninterleukins

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Area of Science:

  • Immunology
  • Hepatology
  • Genetics

Background:

  • Hepatitis C virus (HCV) infection presents diverse clinical outcomes.
  • Host immune responses and genetic factors are key determinants of HCV infection's heterogeneity.
  • Polymorphisms in immune genes influence both spontaneous viral clearance and treatment efficacy.

Purpose of the Study:

  • To review the current understanding of immunogenetic factors in HCV infection.
  • To explore the role of innate and adaptive immunity in HCV resolution and disease progression.
  • To contextualize these factors within current and future HCV treatment strategies.

Main Methods:

  • Literature review of studies on host genetics and HCV infection.
  • Analysis of polymorphisms in innate and adaptive immune genes.
  • Evaluation of the impact of genetic factors on HCV outcomes and treatment response.

Main Results:

  • Innate immune system polymorphisms, especially IFNL3/4 variants, significantly impact treatment outcomes.
  • Host genetic factors are crucial in determining the spectrum of HCV disease.
  • The role of innate immunity appears more critical in treatment-associated responses than adaptive immunity.

Conclusions:

  • Host immunogenetics are central to understanding HCV infection variability and treatment response.
  • IFNL3/4 polymorphisms exert a dominant influence on HCV outcomes.
  • Further research into host genetics is essential for personalized HCV management and treatment development.