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TRAF5 promotes plasmacytoid dendritic cell development from bone marrow progenitors.

Shuhei Kobayashi1, Yuka Shiota2, Takeshi Kawabe2

  • 1Department of Microbiology and Immunology, Tohoku University Graduate School of Medicine, Sendai, 980-8575, Japan; Department of Organ Anatomy, Tohoku University Graduate School of Medicine, Sendai, 980-8575, Japan.

Biochemical and Biophysical Research Communications
|November 1, 2019
PubMed
Summary

Tumor necrosis factor receptor-associated factor 5 (TRAF5) supports plasmacytoid dendritic cell (pDC) generation and homeostasis. TRAF5 promotes pDC differentiation from bone marrow progenitors, influencing immune responses.

Keywords:
Cell commitmentPlasmacytoid DCTRAF5

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Area of Science:

  • Immunology
  • Cell Biology

Background:

  • Plasmacytoid dendritic cells (pDCs) are crucial for antiviral defense, producing type 1 interferon.
  • Tumor necrosis factor (TNF) receptor-associated factor 5 (TRAF5) is involved in immune signaling, but its role in pDCs is unclear.

Purpose of the Study:

  • To investigate the function of TRAF5 in the development and maintenance of pDCs.
  • To elucidate the molecular mechanisms by which TRAF5 regulates pDC differentiation.

Main Methods:

  • Analysis of TRAF5 expression in bone marrow and peripheral pDCs.
  • Investigating the impact of TRAF5 on pDC generation and homeostasis in vivo.
  • Examining the role of TRAF5 in the commitment of dendritic cell precursor cells.

Main Results:

  • TRAF5 expression supports pDC generation in the bone marrow.
  • TRAF5 is essential for the homeostasis of the peripheral pDC subset in a cell-intrinsic manner.
  • TRAF5 promotes pDC lineage commitment over conventional DC (cDC) differentiation, regulated by TCF4 and ID2 balance.

Conclusions:

  • TRAF5 acts as a positive regulator of pDC differentiation from bone marrow progenitors.
  • TRAF5 plays a critical role in both the development and maintenance of the pDC lineage.