Insights into transcriptional regulation by FOXP3
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Updated: Aug 14, 2026

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
Bryan D Carson1, Jared E Lopes, David M Soper
1Department of Immunology, University of Washington, Seattle, WA 98195, USA.
Abstract:
FoxP3 recently entered the spotlight as a critical component of regulatory T cell development and function. Several groups are presently engaged in an effort to uncover the mechanistic details of its contribution to this critical T cell subset. Despite this, the mechanism of FoxP3-mediated transcriptional repression and the affected target genes are still largely unknown. First, we discuss insights from work on other Fox family members with an emphasis on those with known roles in the immune system. Second, we review recent data concerning the molecular mechanism of FoxP3 function and its role in human disease. Finally, we consider what is known about FoxP3 target genes and their effect on T cell physiology.
Insights
Forkhead box protein 3 (FoxP3) is crucial for regulatory T cell function. This review explores FoxP3
Area of Science:
- Immunology
- Molecular Biology
- Genetics
Background:
- Regulatory T cells (Tregs) are essential for immune homeostasis.
- Forkhead box protein 3 (FoxP3) is a master regulator of Treg development and function.
- The precise molecular mechanisms of FoxP3-mediated gene regulation remain incompletely understood.
Purpose of the Study:
- To elucidate the molecular mechanisms underlying FoxP3's role in transcriptional repression.
- To identify and discuss known FoxP3 target genes and their physiological impact on T cells.
- To review insights from related Forkhead box (Fox) family members in the immune system.
Main Methods:
- Literature review and synthesis of existing research on FoxP3 and related Fox proteins.
- Analysis of data concerning the molecular function of FoxP3.
- Examination of studies investigating FoxP3's role in human diseases.
Main Results:
- FoxP3 family members share conserved DNA-binding domains, suggesting shared regulatory principles.
- Recent studies highlight FoxP3's function as a transcriptional repressor, though specific targets are still being identified.
- Dysregulation of FoxP3 is implicated in various human autoimmune and inflammatory diseases.
Conclusions:
- Understanding FoxP3's mechanism of action is critical for advancing Treg-based therapies.
- Further research is needed to fully map FoxP3 target genes and their contribution to T cell function.
- FoxP3 remains a key focus for research in immune regulation and disease pathogenesis.
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