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Related Concept Videos

Cell-mediated Immune Responses01:40

Cell-mediated Immune Responses

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Humoral Immune Responses01:36

Humoral Immune Responses

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Cells of the Adaptive Immune Response01:23

Cells of the Adaptive Immune Response

The T and B lymphocytes of the adaptive immune system develop from common lymphoid progenitor cells in the bone marrow. These progenitors give rise to precursors that eventually develop into both T and B lymphocytes. As these precursors mature, they gain the ability to detect and respond to foreign antigens in the body, a process known as immunocompetence. Additionally, these precursors acquire self-tolerance, a process that ensures they do not react to self-antigens. This intricate system...
Diversity of Antigen Receptors01:28

Diversity of Antigen Receptors

Antigen receptors are essential components of the immune system crucial in defending the body against foreign invaders. These receptors are present on the surface of B and T cells, enabling them to recognize antigens and mount an appropriate immune response.
Before encountering any antigen, lymphocytes express these receptors. On B cells, the antigen receptor is a membrane-bound antibody molecule called BCR; on T cells, it is a T cell receptor or TCR. B and T cell receptors are composed of two...
T Cell Activation and Clonal Selection01:22

T Cell Activation and Clonal Selection

T cells are integral to our adaptive immune system, recognizing and effectively responding to foreign antigens. T cell activation and clonal selection are pivotal in orchestrating this immune response. This article elucidates these mechanisms, detailing the roles of cluster of differentiation (CD) markers, major histocompatibility complex (MHC) molecules, costimulatory signals, and the process of clonal selection.
Naive T cells that have not yet encountered an antigen express two primary CD...
B Cell Activation and Differentiation01:24

B Cell Activation and Differentiation

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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Related Experiment Video

Updated: May 7, 2026

Interrogating Individual Autoreactive Germinal Centers by Photoactivation in a Mixed Chimeric Model of Autoimmunity
11:12

Interrogating Individual Autoreactive Germinal Centers by Photoactivation in a Mixed Chimeric Model of Autoimmunity

Published on: April 11, 2019

The germinal center reaction.

Dominique Gatto1, Robert Brink

  • 1Garvan Institute of Medical Research and St Vincent's Clinical School, University of New South Wales, Darlinghurst, Australia.

The Journal of Allergy and Clinical Immunology
|November 6, 2010
PubMed
Summary
This summary is machine-generated.

The germinal center (GC) reaction is crucial for adaptive immunity, producing high-affinity antibodies. Defects in GC function can lead to autoimmune, inflammatory, and malignant diseases.

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Analysis of Somatic Hypermutation in the JH4 intron of Germinal Center B cells from Mouse Peyer's Patches

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Last Updated: May 7, 2026

Interrogating Individual Autoreactive Germinal Centers by Photoactivation in a Mixed Chimeric Model of Autoimmunity
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Published on: April 11, 2019

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Evaluation of T Follicular Helper Cells and Germinal Center Response During Influenza A Virus Infection in Mice

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Analysis of Somatic Hypermutation in the JH4 intron of Germinal Center B cells from Mouse Peyer's Patches
09:35

Analysis of Somatic Hypermutation in the JH4 intron of Germinal Center B cells from Mouse Peyer's Patches

Published on: April 20, 2021

Area of Science:

  • Immunology
  • Molecular Biology

Background:

  • The germinal center (GC) reaction is fundamental to T-dependent humoral immunity.
  • GCs are sites where B cells, T follicular helper cells, and follicular dendritic cells collaborate.
  • Their primary role is generating high-affinity antibodies and memory B cells for sustained immunity.

Purpose of the Study:

  • To review current knowledge on B cell recruitment, selection, and differentiation within GCs.
  • To discuss the implications of GC defects in autoimmune, inflammatory, and malignant diseases.
  • To highlight recent advances in understanding cellular movement and migratory signals in GC formation.

Main Methods:

  • Literature review of current knowledge on GC physiology.
  • Analysis of recent findings on cellular dynamics and migratory signals within GCs.

Main Results:

  • GCs are essential for adaptive immune responses, producing protective antibodies and memory cells.
  • Somatic mutation within GCs, while beneficial, poses risks for oncogenesis and autoimmunity.
  • GC dysfunction is implicated in various pathological conditions.

Conclusions:

  • Understanding GC dynamics is critical for addressing immune-related disorders.
  • Further research into GC formation and function can inform therapeutic strategies for autoimmune diseases, inflammation, and cancer.