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JunB Controls Intestinal Effector Programs in Regulatory T Cells.

Joshua D Wheaton1, Maria Ciofani1,2

  • 1Department of Immunology, Duke University Medical Center, Durham, NC, United States.

Frontiers in Immunology
|April 17, 2020
PubMed
Summary
This summary is machine-generated.

The transcription factor JunB is crucial for intestinal regulatory T cell (Treg) adaptation. JunB controls specific gene programs in Tregs, maintaining immune balance in the gut.

Keywords:
AP-1 - activator protein 1Transcriptional (regulation)follicular regulatory T cellmucosal homeostasisregulatory T (Treg) cell

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Area of Science:

  • Immunology
  • Molecular Biology
  • Cell Biology

Background:

  • Foxp3-expressing regulatory T (Treg) cells are vital for immune tolerance.
  • Tissue-specific adaptation of Treg function is critical but not fully understood.
  • Understanding factors controlling Treg gene expression is key to immune regulation.

Purpose of the Study:

  • To investigate the role of the AP-1 transcription factor JunB in Treg adaptation to the intestinal environment.
  • To identify specific gene expression programs regulated by JunB in intestinal Tregs.
  • To elucidate the impact of JunB deficiency on Treg function and immune homeostasis in the gut.

Main Methods:

  • Treg-specific gene ablation of JunB in mouse models.
  • Analysis of immune cell populations and cytokine production in the colon and Peyer's patches.
  • Transcriptional profiling to identify JunB-regulated genes.

Main Results:

  • Treg-specific JunB ablation led to immune dysregulation, including increased colonic T helper cells and cytokine production.
  • JunB controls distinct gene programs in multiple Treg subsets within the intestine.
  • JunB is essential for maintaining CD25- Tregs in Peyer's patches, impacting T follicular regulatory cells.
  • JunB regulates a cytolytic effector program, including granzyme B, in major colonic Treg subsets.

Conclusions:

  • JunB is a key regulator of intestinal Treg adaptation and effector function.
  • JunB orchestrates tissue-specific gene expression in Tregs, influencing immune homeostasis.
  • JunB's role in Treg adaptation is distinct from its binding partner BATF, highlighting unique functions.