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Related Concept Videos

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 Adaptive Immune Response01:23

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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...
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Special Features of Adaptive Immunity01:20

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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.
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Diversity of Antigen Receptors01:28

Diversity of Antigen Receptors

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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...
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T Cell Activation and Clonal Selection01:22

T Cell Activation and Clonal Selection

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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.
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Immunological Memory01:23

Immunological Memory

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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.
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In Vitro Differentiation Model of Human Normal Memory B Cells to Long-lived Plasma Cells
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Functional heterogeneity in the memory B-cell response.

Brittany Henry1, Brian J Laidlaw1

  • 1Division of Allergy and Immunology, Department of Medicine, Washington University School of Medicine, St. Louis, MO, USA.

Current Opinion in Immunology
|January 18, 2023
PubMed
Summary
This summary is machine-generated.

Memory B-cells (MBCs) are key for lasting immunity after vaccination. Research shows these cells are diverse, with distinct subsets offering varied protection against viruses like SARS-CoV-2 and influenza.

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Area of Science:

  • Immunology
  • Vaccinology
  • Virology

Background:

  • Vaccines generate antibody and memory B-cell (MBC) responses for protective immunity.
  • Antibody levels decrease over time, requiring booster shots to maintain protection.
  • MBCs persist after vaccination and can quickly produce antibodies or improve them upon re-exposure to antigens.

Purpose of the Study:

  • To review current evidence on the heterogeneity of MBC populations.
  • To explore the distinct roles of MBC subsets in protective immunity.
  • To discuss the implications for developing vaccines that provide broad protection.

Main Methods:

  • Review of emerging scientific literature on MBC heterogeneity.
  • Analysis of transcriptional and phenotypic data of MBC subsets.
  • Examination of MBC function upon antigen re-encounter.

Main Results:

  • MBCs are not a uniform population but comprise distinct subsets.
  • These subsets possess unique characteristics and functions.
  • Different MBC subsets play specific roles in immune response to antigen re-exposure.

Conclusions:

  • Understanding MBC heterogeneity is crucial for vaccine development.
  • Targeting specific MBC subsets could enhance vaccine efficacy.
  • This knowledge may lead to vaccines providing broader and more durable protection against viral threats like SARS-CoV-2 and influenza.