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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...
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Calmodulin-dependent Signaling

Calmodulin (CaM) is a calcium-binding protein in eukaryotes that controls various calcium-regulated cellular processes. It has four calcium-binding sites that bind calcium to form the calcium-calmodulin ( Ca2+-CaM) complex. GPCR stimulation increases the calcium levels in the cells that bind to CaM and induces a conformational change.
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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.
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Feedback Regulation of Calcium Concentration01:27

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NF-κB-dependent Signaling Pathway

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NF-κB-dependent Signaling Mechanism
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Imaging Initial Ca2+ Microdomains in Primary T Cells
05:56

Imaging Initial Ca2+ Microdomains in Primary T Cells

Published on: October 4, 2024

Impact of Ca2+ signaling on B cell function.

Yoshihiro Baba1, Tomohiro Kurosaki

  • 1Laboratory for Lymphocyte Differentiation, WPI Immunology Frontier Research Center, Osaka University, Suita, Osaka 565-0871, Japan. babay@ifrec.osaka-u.ac.jp

Trends in Immunology
|October 18, 2011
PubMed
Summary

Calcium (Ca2+) signaling is crucial for B cell function, regulating gene expression and cell fate. Stromal interaction molecule (STIM) and Orai proteins mediate store-operated Ca2+ entry (SOCE), vital for B cell responses and immune health.

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Area of Science:

  • Immunology
  • Cell Biology
  • Biochemistry

Background:

  • Intracellular calcium (Ca2+) concentration dynamics are critical for B cell signal transduction, influencing gene expression, apoptosis, and differentiation.
  • B cell receptor engagement triggers a Ca2+ flux from endoplasmic reticulum stores, followed by sustained Ca2+ influx via store-operated Ca2+ entry (SOCE).

Purpose of the Study:

  • To review B cell signaling pathways governing SOCE.
  • To elucidate the role of Ca2+ signals in B cell regulatory functions.
  • To explore the link between dysregulated Ca2+ signaling and immune-related diseases.

Main Methods:

  • Literature review of B cell signaling pathways.
  • Analysis of the role of STIM and Orai proteins in SOCE.
  • Examination of Ca2+ dysregulation in immune-related diseases.

Main Results:

  • STIM and Orai are key components of SOCE, enabling detailed investigation of Ca2+ signaling in B cells.
  • Ca2+ signals play a fundamental role in regulating B cell function.
  • Imbalances in Ca2+ signaling are implicated in the pathogenesis of immune disorders.

Conclusions:

  • Understanding Ca2+ signaling pathways, particularly SOCE mediated by STIM and Orai, is essential for comprehending B cell biology.
  • Aberrant Ca2+ signaling contributes to immune-related diseases, highlighting potential therapeutic targets.