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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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Development of Immunocompetence01:22

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The initiation of cell-mediated immunity can be observed as early as the third month of fetal growth, with active antibody-mediated immunity following approximately one month later.
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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

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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.
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Defense Against Bacterial Pathogens01:31

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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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Evolution of B cell immunity.

David Parra1, Fumio Takizawa1, J Oriol Sunyer1

  • 1Department of Pathobiology, School of Veterinary Medicine, University of Pennsylvania, Philadelphia, Pennsylvania 19104.

Annual Review of Animal Biosciences
|October 24, 2014
PubMed
Summary
This summary is machine-generated.

Adaptive immunity in vertebrates evolved into two main strategies: VLR-based and BCR/TCR-based systems. Comparative studies in nonclassical species enhance understanding of B cell immunity and vaccine development against emerging pathogens.

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Area of Science:

  • Comparative immunology
  • Evolution of immune systems
  • Vertebrate immunology

Background:

  • Vertebrates possess two distinct adaptive immune strategies: VLR-based (jawless vertebrates) and BCR/TCR-based (jawed vertebrates).
  • B cells and their precursors play a crucial role in adaptive immunity, with their evolution varying across animal phyla.

Purpose of the Study:

  • To review the features of B cells and their evolutionary predecessors in various animal groups.
  • To highlight the significance of nonclassical species and comparative immunology in understanding B cell immunity.
  • To underscore the contribution of research in veterinary-relevant species to vaccine development.

Main Methods:

  • Literature review focusing on B cell evolution and function.
  • Comparative analysis of immune systems across different animal phyla.
  • Emphasis on studies involving nonclassical vertebrate models.

Main Results:

  • Detailed summary of B cell characteristics and their evolutionary trajectory in jawed vertebrates.
  • Identification of key insights gained from studying nonclassical species.
  • Demonstration of the link between basic research in diverse species and applied vaccine science.

Conclusions:

  • Comparative immunology, particularly in nonclassical species, is vital for a comprehensive understanding of B cell immunity.
  • Research in species relevant to veterinary medicine directly informs the development of more effective vaccines against novel infectious agents.