B7-CD28 co-stimulation modulates central tolerance via thymic clonal deletion and Treg generation through distinct mechanisms

Abstract

B7-CD28 co-stimulation is important for T cell activation and clonal expansion in the periphery. Here the authors show that, in mouse thymus, B7-CD28 differentially controls thymocyte clonal deletion and Treg induction, with distinct CD28 signaling domains and B7-expressing antigen presenting cells mediating these two processes.