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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...
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...
Immunological Memory01:23

Immunological Memory

Immunological memory, a pivotal pillar of the adaptive immune system, is responsible for the body's ability to remember and respond more swiftly and effectively to previously encountered pathogens. This remarkable feature is what makes vaccines so effective in preventing diseases.
What is Immunological Memory?
Immunological memory is an integral function of the immune system that allows it to recognize and react more rapidly and effectively to pathogens previously encountered. This feature is...
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,...

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Related Experiment Video

Updated: May 23, 2026

The Isolation, Differentiation, and Quantification of Human Antibody-secreting B Cells from Blood: ELISpot as a Functional Readout of Humoral Immunity
08:26

The Isolation, Differentiation, and Quantification of Human Antibody-secreting B Cells from Blood: ELISpot as a Functional Readout of Humoral Immunity

Published on: December 14, 2016

Multiple routes to B-cell memory.

Kim L Good-Jacobson1, David M Tarlinton

  • 1Immunology Division, Walter and Eliza Hall Institute of Medical Research, Parkville, Victoria, Australia. jacobson@wehi.edu.au

International Immunology
|March 28, 2012
PubMed
Summary
This summary is machine-generated.

B-cell memory provides long-term immunity through diverse cell types. Recent studies reveal that T-dependent IgM memory B cells and memory-like cells offer distinct but crucial pathways for maintaining humoral immunity over time.

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The Isolation, Differentiation, and Quantification of Human Antibody-secreting B Cells from Blood: ELISpot as a Functional Readout of Humoral Immunity
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Characterization of Thymus-dependent and Thymus-independent Immunoglobulin Isotype Responses in Mice Using Enzyme-linked Immunosorbent Assay
06:15

Characterization of Thymus-dependent and Thymus-independent Immunoglobulin Isotype Responses in Mice Using Enzyme-linked Immunosorbent Assay

Published on: September 7, 2018

Area of Science:

  • Immunology
  • Cell Biology
  • Humoral Immunity

Background:

  • B-cell memory is crucial for long-term humoral immunity, involving plasma cells and memory B cells.
  • The heterogeneity within the memory B-cell population and its functional significance remain areas of active investigation.
  • Understanding different memory B-cell subsets is key to comprehending the evolution and maintenance of adaptive immunity.

Purpose of the Study:

  • To investigate the formation and function of diverse memory B-cell subsets.
  • To clarify the role of T-dependent (TD) IgM memory B cells and T-independent memory-like cells in humoral immunity.
  • To explore the implications of B-cell memory heterogeneity for long-term immune responses.

Main Methods:

  • Comparative analysis of T-dependent (TD) class-switched memory B cells, TD IgM memory B cells, and T-independent memory-like cells.
  • Functional assays to assess the contribution of different subsets to humoral immunity.
  • Exploration of the developmental pathways leading to B-cell memory populations.

Main Results:

  • T-dependent IgM memory B cells and memory-like cells exhibit distinct characteristics compared to canonical TD class-switched memory B cells.
  • These distinct subsets play a significant role in preserving the memory B-cell population over extended periods.
  • Evidence suggests multiple pathways exist for generating B-cell memory, potentially preceding the development of germinal centers.

Conclusions:

  • B-cell memory is more heterogeneous than previously appreciated, with distinct subsets contributing to long-term humoral immunity.
  • T-dependent IgM memory B cells and memory-like cells are vital for maintaining immune memory, possibly representing earlier evolutionary pathways.
  • The findings highlight the complex and multifaceted nature of B-cell memory generation and maintenance.