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Related Concept Videos

B Cell Activation and Differentiation01:24

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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.
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Related Experiment Video

Updated: Oct 10, 2025

Author Spotlight: Novel Assay for Studying B-Cell Responses in Multiple Sclerosis Research
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Published on: December 1, 2023

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Specific hypomethylation programs underpin B cell activation in early multiple sclerosis.

Qin Ma1, Stacy J Caillier2, Shaun Muzic2

  • 1Weill Institute for Neurosciences, Department of Neurology, University of California, San Francisco, CA 94158 qin.ma@ucsf.edu jorge.oksenberg@ucsf.edu.

Proceedings of the National Academy of Sciences of the United States of America
|December 16, 2021
PubMed
Summary

Epigenetic changes, specifically DNA hypomethylation in B cells, are linked to multiple sclerosis (MS) onset. These changes in B cells may drive disease pathogenesis by altering immune cell activation.

Keywords:
B cellhypomethylationmultiple sclerosis

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Area of Science:

  • Immunology
  • Neuroscience
  • Genetics

Background:

  • Epigenetic alterations are observed in multiple sclerosis (MS) but their role in pathogenesis is unclear.
  • Previous studies faced limitations due to sample heterogeneity and restricted genomic coverage.

Purpose of the Study:

  • To comprehensively analyze genome-wide DNA methylation patterns in immune cells from MS patients.
  • To investigate the contribution of epigenetic changes to MS pathogenesis.

Main Methods:

  • Genome-wide DNA methylation analysis was performed on four peripheral immune cell types.
  • Data from 29 MS patients at disease onset and 24 healthy controls were analyzed.
  • Integration with gene expression and genetic susceptibility data was conducted.

Main Results:

  • B cells from new-onset MS patients showed significant global DNA hypomethylation compared to other immune cells.
  • 4,933 differentially methylated regions in B cells were associated with MS.
  • Hypomethylated regions correlated with upregulated cell activation transcriptional programs.

Conclusions:

  • Aberrant B cell function, indicated by DNA hypomethylation, is implicated in the etiology of multiple sclerosis.
  • Epigenetic signatures in B cells may contribute to MS pathogenesis by influencing immune cell activation pathways.