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Updated: Jul 29, 2026

Generation of Human CD40-activated B cells
13:27

Generation of Human CD40-activated B cells

Published on: October 17, 2009

Cooperation of multiple signaling pathways in CD40-regulated gene expression in B lymphocytes

Hajir Dadgostar1, Brian Zarnegar, Alexander Hoffmann

  • 1Molecular Biology Institute and Medical Scientist Training Program, School of Medicine, University of California, Los Angeles, CA 90095, USA.

Proceedings of the National Academy of Sciences of the United States of America
|February 7, 2002
PubMed

Insights

CD40/CD40L interaction drives B cell immune responses. Specific signaling pathways regulate gene expression for germinal center formation and antibody production, offering therapeutic targets.

Area of Science:

  • Immunology
  • Molecular Biology
  • Systems Biology

Background:

  • CD40/CD40L interaction is crucial for T-dependent humoral immunity.
  • This interaction regulates B cell survival, proliferation, germinal center formation, and antibody maturation.

Purpose of the Study:

  • To investigate gene expression changes in mouse B lymphocytes stimulated by CD40L.
  • To dissect the roles of distinct CD40-activated signaling pathways in regulating gene expression.

Main Methods:

  • High-density microarrays were used to analyze gene expression in primary mouse B lymphocytes.
  • Analysis of gene expression patterns following CD40L stimulation at multiple time points.
  • Investigation of individual CD40-activated signal transduction pathways.

Main Results:

  • CD40L specifically activated genes involved in germinal center formation and T cell costimulation.
  • Gene down-regulation was identified as a significant part of the response, with the p38 pathway playing a key role.
  • The NF-kappa B pathway was important for up-regulating primary response genes.

Conclusions:

  • CD40L stimulation orchestrates complex gene expression programs essential for adaptive immunity.
  • Distinct signaling pathways differentially regulate gene expression modules, offering potential for targeted manipulation.
  • Understanding these pathways provides insights into controlling B cell-mediated immune responses.

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