Targeting the FOXP3-T-bet interaction to restore Treg stability in IFN-γ-driven autoimmunity.

Disruption of FOXP3-T-bet interaction due to V408M mutation impairs Treg control of IFN-γ-driven Th1 inflammation in IPEX syndrome.

• Why it matters: Understanding how specific FOXP3 mutations lead to Treg dysfunction is crucial for developing targeted therapies for autoimmune diseases like IPEX syndrome, where immune regulation fails.
• What they did: Researchers used genetic models and AI-driven virtual screening to identify a small molecule, FM029, that enhances FOXP3-T-bet interaction, testing its effects on Treg function and inflammation in mice.
• The result: FM029 suppressed IFN-γ production and reduced tissue inflammation, demonstrating that pharmacologically stabilizing FOXP3-T-bet interaction can potentially treat IFN-γ-driven immune disorders.