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Updated: Jul 13, 2026

Isolation and Activation of Murine Lymphocytes
Published on: October 30, 2016
MTA3 and the Mi-2/NuRD complex regulate cell fate during B lymphocyte differentiation
Naoyuki Fujita1, David L Jaye, Cissy Geigerman
1Department of Pathology and Laboratory Medicine, Emory University School of Medicine, Atlanta, GA 30322, USA.
MTA3 is a novel cofactor for the BCL-6 transcriptional repressor, crucial for B lymphocyte cell fate. MTA3 depletion impairs BCL-6 function, altering B cell development and plasma cell differentiation.
Area of Science:
- Immunology
- Molecular Biology
- Cell Biology
Background:
- The transcriptional repressor BCL-6 controls B lymphocyte cell fate during the germinal center reaction.
- BCL-6 prevents premature differentiation of B lymphocytes into plasma cells.
Purpose of the Study:
- To identify cofactors involved in BCL-6-dependent cell fate determination.
- To elucidate the role of MTA3 in BCL-6-mediated transcriptional repression.
Main Methods:
- RNA interference (RNAi) for MTA3 depletion.
- Co-immunoprecipitation to assess BCL-6/Mi-2/NuRD interaction.
- Analysis of B lymphocyte and plasma cell transcriptional patterns and cell surface markers.
Main Results:
- MTA3, a subunit of the Mi-2/NuRD complex, interacts with BCL-6.
- MTA3 is co-expressed with BCL-6 in germinal centers.
- MTA3 depletion impairs BCL-6 repression and alters B cell-specific gene expression.
- BCL-6 expression in plasma cells, dependent on MTA3, represses plasma cell genes and reactivates B cell programs.
Conclusions:
- MTA3 is a critical cofactor for BCL-6 in regulating B lymphocyte cell fate.
- MTA3 facilitates BCL-6-mediated repression, influencing the balance between B cell proliferation and plasma cell differentiation.
- Targeting the BCL-6/MTA3 interaction may offer therapeutic strategies for B cell malignancies.
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