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Dendritic cell fate is determined by BCL11A

Gregory C Ippolito1, Joseph D Dekker, Yui-Hsi Wang

  • 1Department of Molecular Biosciences, Institute for Cellular and Molecular Biology, University of Texas at Austin, Austin, TX 78712.

Proceedings of the National Academy of Sciences of the United States of America
|March 5, 2014
PubMed

Insights

The transcription factor BCL11A is essential for plasmacytoid dendritic cell (pDC) development and function in both fetal and adult mice. Its absence disrupts pDC formation and antiviral responses, revealing a key regulator of immune cell differentiation.

Area of Science:

  • Immunology
  • Developmental Biology
  • Molecular Genetics

Background:

  • Plasmacytoid dendritic cells (pDCs) are crucial for innate and adaptive immunity.
  • The developmental pathways and transcriptional regulation of pDCs remain incompletely understood.

Purpose of the Study:

  • To investigate the role of the BCL11A transcription factor in pDC development.
  • To elucidate the molecular mechanisms by which BCL11A controls pDC lineage commitment.

Main Methods:

  • Germ-line deletion of Bcl11a in embryonic mice.
  • Conditional deletion of Bcl11a in adult hematopoietic stem cells.
  • Genome-wide analyses of BCL11A DNA binding and gene expression.
  • Viral challenge to assess immune response.

Main Results:

  • Bcl11a deficiency led to a complete absence of fetal pDCs.
  • Conditional deletion in adults resulted in loss of pDC and B-cell lineages, with preserved myeloid and T-cell lineages.
  • BCL11A was found to regulate key pDC differentiation factors like E2-2, ID2, and MTG16.
  • Mice with deleted Bcl11a showed impaired antiviral responses.

Conclusions:

  • BCL11A is an essential, lineage-specific transcription factor for pDC development.
  • pDC differentiation may represent a default pathway for common dendritic cell progenitors regulated by BCL11A.

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