In the T2D group, both CD4+ and CD8+ lymphocytes expressed CCR7 with higher frequency than the ND group (2.27-fold, p = 0.01; and 1.69-fold, p = 0.02, respectively) (gating is shown in Figure 2A and results in Figures 2F,G). This evidence concerns the gene CD4 and type 2 diabetes mellitus.