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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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Epigenetic changes alter the physical structure of the DNA without changing the genetic sequence and often regulate whether genes are turned on or off. This regulation ensures that each cell produces only proteins necessary for its function. For example, proteins that promote bone growth are not produced in muscle cells. Epigenetic mechanisms play an essential role in healthy development. Conversely, precisely regulated epigenetic mechanisms are disrupted in diseases like cancer.
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Epigenetics is the study of inherited changes in a cell's phenotype without changing the DNA sequences. It provides a form of memory for the differential gene expression pattern to maintain cell lineage, position-effect variegation, dosage compensation, and maintenance of chromatin structures such as telomeres and centromeres. For example, the structure and location of the centromere on chromosomes are epigenetically inherited. Its functionality is not dictated or ensured by the underlying...
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Updated: Feb 23, 2026

Genome-wide Analysis of HDAC Inhibitor-mediated Modulation of microRNAs and mRNAs in B Cells Induced to Undergo Class-switch DNA Recombination and Plasma Cell Differentiation
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Charting the dynamic epigenome during B-cell development.

Jose I Martin-Subero1, Christopher C Oakes2

  • 1Biomedical Epigenomics Group, Institut d'investigacions Biomèdiques August Pi I Sunyer (IDIBAPS), University of Barcelona, Barcelona, Spain.

Seminars in Cancer Biology
|August 31, 2017
PubMed
Summary
This summary is machine-generated.

B-cell maturation involves extensive DNA methylation changes, particularly during specific transitions. These epigenetic modifications impact B-cell function and may resemble cancer hallmarks in mature cells.

Keywords:
AgingB cellCancerCell differentiationCellular longevityDNA methylationEpigeneticsEpigenomicsTranscription factors

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Area of Science:

  • Epigenetics
  • Hematopoiesis
  • Cellular Differentiation

Background:

  • The DNA methylome is dynamically regulated during embryonic development and cell differentiation.
  • B-cell maturation involves significant epigenetic reprogramming, affecting approximately one-third of CpG sites.

Purpose of the Study:

  • To characterize the DNA methylome dynamics during B-cell differentiation.
  • To understand the role of epigenetic modifications in B-cell maturation and function.

Main Methods:

  • Analysis of DNA methylation patterns across various B-cell maturation stages.
  • Correlation of epigenetic changes with gene expression and B-cell functional states.

Main Results:

  • B-cell maturation exhibits distinct DNA methylation fingerprints at different stages.
  • Epigenetic modifications accumulate in specific chromatin regions, influencing B-cell transcription factors and gene expression.
  • Mature B cells show DNA methylation changes in heterochromatic and CpG-rich regions, similar to cancer hallmarks.

Conclusions:

  • DNA methylome characterization provides insights into the epigenetic regulation of B-cell maturation.
  • Late B cells accumulate epigenetic changes linked to proliferation and longevity, with potential implications for understanding cellular aging and disease.