Cooperative Foxp3 enhancers, not a single switch, govern Treg induction
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An expert lecture on ImmuneZoom argued that regulatory T cell induction is controlled cooperatively by multiple enhancers at the Foxp3 locus, including CNS0, CNS2 and CNS3, rather than by a single regulatory switch. Deleting any one enhancer only mildly reduced Treg diversity and was tolerated by the animals. Combined deletions, however, were catastrophic: CNS0 plus CNS2, or CNS3 plus Aire, caused severe lethal autoimmunity, and the CNS0/CNS2 double deletion shortened mouse lifespan to 2-3 months. The speaker proposed a 'relative' tolerance model in which Foxp3 operates within dynamic complexes alongside factors such as AP1 and FOX. The lecture frames a theoretical basis for engineering Tregs for therapy. Experimental testing of the proposed model and its translation into engineered Treg strategies remain open questions.
Written by a model from the reports · updated 2 hours ago
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- youtube.comExpert lecture explains how multiple Foxp3 enhancers cooperate to control Treg induction and stability
An expert lecture on ImmuneZoom argued that Treg induction efficiency is controlled cooperatively by multiple enhancers at the Foxp3 locus (CNS0, CNS2, CNS3 and others) rather than a single switch. Single enhancer deletions only mildly reduced Treg diversity and were tolerated, but combined deletions such as CNS0 plus CNS2, or CNS3 plus Aire, caused severe lethal autoimmunity; CNS0 and CNS2 double deletion also shortened mouse lifespan to 2-3 months. The speaker proposed a 'relative' tolerance model and said Foxp3 acts in dynamic complexes with factors such as AP1 and FOX, providing a theoretical basis for engineering Tregs for therapy.
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