By decreasing programmed cell death protein 1 on CD8+ T cells and restoring Treg function via inhibiting STAT3 or via induction of forkhead box P3 (Foxp3), low‐dose DAC could enhance the immunosuppressive function of Th and Tc cells in ITP.44, 45. This evidence concerns the gene CD8A and autoimmune thrombocytopenic purpura.