PT  - JOURNAL ARTICLE
AU  - Cornelia Schuster
AU  - Fangzhu Zhao
AU  - Stephan Kissler
TI  - Peripherally-induced regulatory T cells contribute to the control of autoimmune diabetes
AID  - 10.1101/199646
DP  - 2017 Jan 01
TA  - bioRxiv
PG  - 199646
4099  - http://biorxiv.org/content/early/2017/10/07/199646.short
4100  - http://biorxiv.org/content/early/2017/10/07/199646.full
AB  - Type 1 diabetes (T1D) results from the autoimmune destruction of pancreatic beta cells and is partly caused by deficiencies in the Foxp3+ regulatory T cell (Treg) compartment. Conversely, therapies that increase Treg function can prevent autoimmune diabetes in animal models. The majority of Tregs develop in the thymus (tTregs), but a proportion of Foxp3+ Tregs is generated in the periphery (pTregs) from Foxp3-CD4+ T cell precursors. Whether pTregs play a distinct role in T1D has not yet been explored. We report here that pTregs are a key modifier of disease in the nonobesed diabetic (NOD) mouse model for T1D. We generated NOD mice deficient for the Foxp3 enhancer CNS1 involved in pTreg induction. We show that CNS1 knockout decreased the frequency of pTregs and increased the risk of diabetes. Our results show that pTregs fulfill an important non-redundant function in the prevention of beta cell autoimmunity that causes T1D.