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Related Concept Videos

Hepatitis01:25

Hepatitis

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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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Immune Response Against Viral Pathogens01:29

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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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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...
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The adaptive immune response, a sophisticated defense mechanism, relies on the activation and differentiation of B lymphocytes, or B cells. These processes enable our bodies to mount a tailored response against specific pathogens such as bacteria, free virus particles, toxins, and parasites.
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Related Experiment Video

Updated: May 1, 2026

Stem Cell-Derived Viral Ag-Specific T Lymphocytes Suppress HBV Replication in Mice
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Adaptive response in hepatitis B virus infection.

E Loggi1, N Gamal, F Bihl

  • 1Institute for Research in Biomedicine, Bellinzona, Switzerland; Department of Medical and Surgical Sciences, University of Bologna, Bologna, Italy.

Journal of Viral Hepatitis
|March 29, 2014
PubMed
Summary
This summary is machine-generated.

Hepatitis B virus (HBV) infection outcomes depend on the immune response. This review analyzes adaptive immunity, focusing on CD8+ T cells, CD4+ T cells, and B cells in acute and chronic HBV infections.

Keywords:
B lymphocytesCD4 lymphocytesCD8 lymphocytesHepatitis Bimmune response

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Area of Science:

  • Immunology
  • Hepatology
  • Virology

Background:

  • Hepatitis B virus (HBV) causes significant global liver inflammation.
  • Immune responses are critical in determining HBV infection clearance or chronic damage.
  • Understanding immune cell roles is key to managing HBV infection.

Purpose of the Study:

  • To analyze adaptive immune patterns during acute HBV infection.
  • To examine immune cell profiles in chronic HBV infection.
  • To review the roles of CD8+ T cells, CD4+ T cells, and B cells in HBV infection.

Main Methods:

  • Literature review of adaptive immunity in HBV infection.
  • Analysis of CD8+ T cell functions and abnormalities in chronic infection.
  • Evaluation of CD4+ T cell and B cell roles in HBV pathogenesis.

Main Results:

  • Adaptive immunity patterns differ between acute and chronic HBV.
  • CD8+ T cell dysfunction is prominent in chronic HBV infection.
  • CD4+ T cells and B cells also play significant roles in HBV immunity.

Conclusions:

  • Immune responses, particularly T cell subsets and B cells, dictate HBV infection outcomes.
  • Targeting immune pathways may reverse immune impairment in chronic HBV.
  • Further research into adaptive immunity is crucial for HBV therapeutic strategies.