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Updated: May 4, 2026
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Published on: January 22, 2020
Searching for the Achilles Heel of FOXP3
Teresa Lozano1, Noelia Casares1, Juan José Lasarte1
1Gene Therapy and Hepatology Area, Center for Applied Medical Research (CIMA), University of Navarra , Pamplona , Spain.
Abstract:
FOXP3 is a multifaceted transcription factor with a major role in the control of immune homeostasis mediated by T regulatory cells (Treg). The immunoregulatory function of FOXP3 may hinder the induction of immune responses against cancer and infectious agents, and thus, development of inhibitors of its functions might give new therapeutic opportunities for these diseases. But also, FOXP3 is an important tumor suppressor factor in some types of cancers, and therefore, understanding the structure and function of FOXP3 is crucial to gaining insights into the development of FOXP3-targeted therapeutic strategies. FOXP3 homodimerize and likely form supramolecular complexes which might include hundreds of proteins which constitute the FOXP3 interactome. Many of the functions of FOXP3 are clearly regulated by the interactions with these cofactors contributing importantly on the establishment of Treg-cell signature. We summarize here the structural/functional information on this FOXP3 complex, to identify potential opportunities for the development of new strategies to modulate FOXP3 activity.
Insights
Forkhead box protein 3 (FOXP3) regulates immune homeostasis via T regulatory cells (Tregs). Understanding FOXP3 structure and function is key to developing new cancer and infectious disease therapies by modulating its activity.
Area of Science:
- Immunology
- Molecular Biology
- Structural Biology
Background:
- FOXP3 is a critical transcription factor for immune homeostasis, primarily through its role in T regulatory cells (Tregs).
- Its immunoregulatory functions can impede anti-cancer and anti-infective immune responses, suggesting therapeutic potential for FOXP3 inhibitors.
- Conversely, FOXP3 acts as a tumor suppressor in certain cancers, highlighting the need for a comprehensive understanding of its structure-function relationship for targeted therapies.
Purpose of the Study:
- To review and summarize structural and functional information regarding the FOXP3 complex.
- To identify potential therapeutic strategies for modulating FOXP3 activity.
Main Methods:
- Review of existing literature on FOXP3 structure, function, and interactions.
- Analysis of the FOXP3 interactome and its role in Treg cell signature.
Main Results:
- FOXP3 forms homodimers and participates in large supramolecular complexes.
- Interactions with cofactors are crucial for regulating FOXP3 functions and establishing the Treg cell signature.
Conclusions:
- Understanding the structural and functional dynamics of FOXP3 complexes is essential for developing novel therapeutic strategies.
- Targeting FOXP3 activity offers potential for treating cancer and infectious diseases, as well as understanding its tumor suppressor roles.
