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Related Concept Videos

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...
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...
NF-κB-dependent Signaling Pathway02:26

NF-κB-dependent Signaling Pathway

The transcription factor NF-κB was discovered in 1986 in the lab of Nobel laureate Professor David Baltimore, for its interaction with the immunoglobulin light chain enhancer in B-cells. After more than three decades of study, it is now evident that NF-κB regulates the expression of over 100 genes. Most of these genes play an essential role in the innate and adaptive immune responses as well as the inflammatory responses of animals.
NF-κB-dependent Signaling Mechanism
The heterodimer of NF-κB...
Special Features of Adaptive Immunity01:20

Special Features of Adaptive Immunity

The adaptive immune system, a crucial component of the overall immune response, offers a highly specialized defense against pathogens. It involves specific cell types and features, enabling it to combat infections effectively and efficiently.
The primary cell types involved in adaptive immunity are T cells and B cells. Each type has a unique role in defending the body against pathogens. T cells are responsible for cell-mediated immunity. They identify and eliminate infected cells directly,...
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...
Defense Against Bacterial Pathogens01:31

Defense Against Bacterial Pathogens

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.
Phagocytes
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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Related Experiment Video

Updated: Jun 16, 2026

Mouse Na&#239;ve CD4+ T Cell Isolation and In vitro Differentiation into T Cell Subsets
07:12

Mouse Naïve CD4+ T Cell Isolation and In vitro Differentiation into T Cell Subsets

Published on: April 16, 2015

Innate pathways to B-cell activation and tolerance.

Steve P Crampton1, Elisaveta Voynova, Silvia Bolland

  • 1Laboratory of Immunogenetics, National Institute of Allergy and Infectious Diseases, National Institutes of Health, Rockville, Maryland 20852, USA.

Annals of the New York Academy of Sciences
|February 12, 2010
PubMed
Summary
This summary is machine-generated.

Toll-like receptor (TLR) signaling impacts B-cell development and function, influencing both protective immunity and autoimmune disease. Understanding TLRs

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Area of Science:

  • Immunology
  • Cell Biology
  • Autoimmunity

Background:

  • B cells bridge innate and adaptive immunity via B-cell receptors (BCRs) and Toll-like receptors (TLRs).
  • B-cell development checkpoints eliminate self-reactive cells, preventing autoimmunity.
  • TLR signaling influences B-cell fate and inflammatory responses crucial for infection clearance.

Purpose of the Study:

  • To review the intrinsic and extrinsic effects of TLR stimulation on B-cell fate.
  • To highlight the role of TLRs in autoimmune diseases.
  • To discuss differential responses of B-cell subsets to TLR ligands.

Main Methods:

  • Literature review of recent scientific publications.
  • Analysis of studies on B-cell development and TLR signaling pathways.
  • Focus on research related to autoimmune conditions.

Main Results:

  • TLR-dependent signals influence BCR-mediated checkpoints in B-cell development.
  • Extrinsic TLR signaling from innate immune cells affects autoreactive B-cell fate.
  • Naive and memory B cells, along with distinct subsets, exhibit varied responses to TLR ligands.

Conclusions:

  • TLR signaling is critical for regulating B-cell responses in both infection and autoimmunity.
  • Dysregulated TLR signaling in B cells contributes to the pathogenesis of autoimmune diseases.
  • Targeting TLR pathways may offer therapeutic strategies for autoimmune disorders.