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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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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.
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Lymphoid Cells and Tissues01:18

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Lymphoid cells and tissues are integral to the immune system, which is crucial in maintaining our body's defense against harmful pathogens. They form the building blocks of lymphoid organs, which include the spleen, thymus, and lymph nodes.
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Special Features of Adaptive Immunity01:20

Special Features of Adaptive Immunity

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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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The Synapse02:47

The Synapse

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Neurons communicate with one another by passing on their electrical signals to other neurons. A synapse is the location where two neurons meet to exchange signals. At the synapse, the neuron that sends the signal is called the presynaptic cell, while the neuron that receives the message is called the postsynaptic cell. Note that most neurons can be both presynaptic and postsynaptic, as they both transmit and receive information.
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Related Experiment Video

Updated: Jul 25, 2025

Studying Organelle Dynamics in B Cells During Immune Synapse Formation
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Studying Organelle Dynamics in B Cells During Immune Synapse Formation

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Building the synapse engine to drive B lymphocyte function.

Yolanda R Carrasco1

  • 1B Lymphocyte Dynamics Group, Department of Immunology and Oncology, Centro Nacional de Biotecnología (CNB)-CSIC, Madrid, 28049, Spain.

Immunology Letters
|June 27, 2023
PubMed
Summary
This summary is machine-generated.

B cells use their B cell receptor (BCR) to recognize antigens, initiating the humoral immune response. The B cell immune synapse acts as a central engine, coordinating molecular events for effective B cell activation and antibody production.

Keywords:
Actomyosin cytoskeletonAntigen uptakeB cellsImmune synapseMechanical forcesMitochondria

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Visualizing the Actin and Microtubule Cytoskeletons at the B-cell Immune Synapse Using Stimulated Emission Depletion STED Microscopy
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Visualizing the Actin and Microtubule Cytoskeletons at the B-cell Immune Synapse Using Stimulated Emission Depletion STED Microscopy
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Area of Science:

  • Immunology
  • Cell Biology
  • Molecular Biology

Background:

  • B cell activation is crucial for humoral immunity, antibody production, and memory cell generation.
  • B cells patrol secondary lymphoid organs, encountering antigens presented by other immune cells.
  • The B cell receptor (BCR) mediates antigen recognition and initiates B cell activation upon binding antigen.

Approach:

  • This review examines the structure and function of the B cell immune synapse.
  • It highlights the role of the actomyosin cytoskeleton and microtubule network in B cell activation.
  • The review discusses the B cell synapse as a temporal engine driving molecular mechanisms.

Key Points:

  • Antigen binding to the BCR triggers the formation of an immune synapse between the B cell and antigen-presenting cell.
  • The immune synapse features an integrin-enriched domain, stabilizing cell-cell interaction.
  • Cytoskeletal dynamics (actomyosin and microtubules) are essential for signaling, antigen uptake, and organelle polarization within the synapse.

Conclusions:

  • The B cell immune synapse is a dynamic structure critical for B cell activation and the humoral immune response.
  • Further exploration of poorly understood aspects of the B cell synapse engine is warranted.
  • Understanding the B cell synapse provides insights into generating effective antibody responses and immunological memory.