Related Experiment Video

Updated: Dec 29, 2025

In Vitro Differentiation of Human CD4+FOXP3+ Induced Regulatory T Cells (iTregs) from Naïve CD4+ T Cells Using a TGF-β-containing Protocol
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In Vitro Differentiation of Human CD4+FOXP3+ Induced Regulatory T Cells (iTregs) from Naïve CD4+ T Cells Using a TGF-β-containing Protocol

Published on: December 30, 2016

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Control of regulatory T-cell differentiation and function by T-cell receptor signalling and Foxp3 transcription

Masahiro Ono1

  • 1Department of Life Sciences, Imperial College London, London, UK.

Immunology
|February 6, 2020
PubMed

Insights

Forkhead box protein 3 (Foxp3) controls regulatory T-cell (Treg) function. This study details how Foxp3 complexes, influenced by T-cell receptor (TCR) signaling, regulate Treg differentiation and immune suppression.

Area of Science:

  • Immunology
  • Molecular Biology
  • Cell Biology

Background:

  • The transcription factor Foxp3 is crucial for regulatory T-cell (Treg) differentiation and function.
  • Numerous Foxp3-interacting proteins have been identified, but the mechanisms by which Foxp3 orchestrates the Treg-specific gene expression landscape remain incompletely understood.
  • T-cell receptor (TCR) signaling is a key initiator of Treg differentiation and Foxp3-mediated gene regulation.

Purpose of the Study:

  • To elucidate the current understanding of how Foxp3 transcription factor complexes regulate Treg differentiation, maintenance, and functional maturation.
  • To propose new mechanistic models for Foxp3-mediated gene regulation, integrating TCR signaling pathways.
  • To discuss key topics including Foxp3 induction, effector Treg differentiation, gene activation/repression, lineage decision-making, and post-translational modifications.

Main Methods:

  • Review and integration of existing biochemical and genomic studies.
  • Analysis of TCR signaling pathways and their interaction with Foxp3.
  • Discussion of protein-protein interactions, transcriptional regulation, epigenetic mechanisms, and post-translational modifications.

Main Results:

  • Foxp3 expression is initiated by TCR signals and involves transcription factors like NFAT, AP-1, and NF-κB.
  • Foxp3 interacts with AML1/Runx1 and NFAT to modulate TCR-induced gene expression dynamics, essential for immune suppression.
  • The study proposes models for Foxp3's roles in gene regulation, Treg maturation, lineage commitment (Th17/Treg), and regulation by post-translational modifications.

Conclusions:

  • Foxp3 transcription factor complexes, integrated with TCR signaling, are central to Treg differentiation, maintenance, and function.
  • Understanding these molecular mechanisms provides cutting-edge insights into Treg biology and immune suppression.
  • This work highlights the complex interplay of signaling, transcription factors, and epigenetic modifications in controlling Treg cell fate and function.
Keywords:
AML1/Runx1Foxp3TCR signallingprotein-protein interactionregulatory T-cellstranscription factor

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