Complement C4 induces regulatory T cells differentiation through dendritic cell in systemic lupus erythematosus.

Background: Systemic lupus erythematosus (SLE) is a prototypic systemic autoimmune disease. Complement component 4 (C4) has be proved to play a role in pathogenesis of SLE. In the present study, we investigated the effect of C4 on T cells differentiation.