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Related Concept Videos

Immune Response Against Viral Pathogens01:29

Immune Response Against Viral Pathogens

464
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...
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Antigens Involved in Adaptive Immunity01:26

Antigens Involved in Adaptive Immunity

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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.
Complete Antigens
Complete antigens possess both immunogenicity and...
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Cross-reactivity00:42

Cross-reactivity

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Overview
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Defense Against Bacterial Pathogens01:31

Defense Against Bacterial Pathogens

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The human immune system is a complex network of cells, tissues, and organs that work together to defend the body against bacterial infections. It consists of various immune cells, each playing a specific role in the defense mechanism.
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Phagocytes are the frontline soldiers of the immune system. They include neutrophils and macrophages. Neutrophils are the most abundant type of white blood cell and are quickly mobilized to the site of infection. Macrophages are larger cells that patrol...
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B Cell Activation and Differentiation01:24

B Cell Activation and Differentiation

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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.
When naive B cells encounter a specific antigen that can bind to the B cell receptor (BCR) on their surface, they undergo sensitization to respond to the antigen's presence. Sensitization begins with...
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Cells of the Innate Immune Response01:28

Cells of the Innate Immune Response

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The innate immune response is an immediate and non-specific response against pathogens, acting swiftly to prevent the spread of infections. The primary cells involved in this response are phagocytes and natural killer (NK) cells.
Phagocytes
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Related Experiment Video

Updated: May 10, 2025

Detection of Low Copy Number Integrated Viral DNA Formed by In Vitro Hepatitis B Infection
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Innate immune recognition in hepatitis B virus infection.

Aixin Li1, Zhengjun Yi1, Chunqiang Ma1

  • 1School of Laboratory Medicine, Shandong Second Medical University, Weifang, China.

Virulence
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Hepatitis B virus (HBV) infection

Keywords:
HBVHepatitis B virushepatocytesinnate immunityliver non-parenchymal cells

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Area of Science:

  • Immunology
  • Virology
  • Hepatology

Background:

  • Hepatitis B virus (HBV) chronically infects 254 million globally.
  • The interaction between HBV and innate immunity is complex and debated.
  • Some studies show HBV activates innate immunity, while others show suppression.

Purpose of the Study:

  • To clarify the complex interplay between HBV and innate immunity.
  • To synthesize existing research on HBV's immune response.
  • To explore HBV's role as a stealth virus and its implications for therapy.

Main Methods:

  • Review of existing scientific literature.
  • Analysis of studies demonstrating HBV's activation of innate immunity.
  • Examination of evidence for HBV's suppression of innate immune signaling.
  • Investigation of findings supporting HBV's stealth virus characteristics.

Main Results:

  • Conflicting data exists regarding HBV's effect on innate immunity.
  • Evidence suggests HBV can both activate and suppress immune responses.
  • HBV exhibits stealth virus properties, contributing to immune evasion.

Conclusions:

  • Understanding HBV's dual role in innate immunity is crucial for persistence.
  • Elucidating these interactions may lead to novel therapeutic strategies.
  • Further research is needed to fully understand HBV immune evasion mechanisms.