Hypoxia-inducible factor-1α is a critical transcription factor for IL-10-producing B cells in autoimmune disease

B cells are important for antigen presentation and antibody production in humoral immunity, but are also increasingly recognized for their immune regulatory functions. Here the authors show that HIF-1α, a hypoxia-induced transcription factor, is important for controlling IL-10 induction in and immune-suppressive activity of B cells.