Regulatory B (Breg) cells producing interleukin-10 (IL-10) suppress autoimmune disease, but the mechanisms mediating their induction remain unclear. Charles E. Egwuagu and colleagues report that IL-35 induces Breg cells and also promotes their production of IL-35. In vivo IL-35 suppresses autoimmune disease in an IL-35 receptor– and IL-10–dependent manner. Adoptive transfer of IL-35–induced Breg cells inhibits established autoimmune disease, suggesting that IL-35 and IL-35–producing Breg cells may be used to treat inflammatory disease.
- Ren-Xi Wang
- Cheng-Rong Yu
- Charles E Egwuagu