The absolute number of TREG was significantly elevated in both PSPN and PFP (Figure 2A), and this correlated negatively with HLA-DR and Ki-67 expression on CD4 T-cells (Figures 2B,C), consistent with a role for TREG in preserving low immune activation in PSP. Here, MKI67 is linked to supranuclear palsy, progressive, 1.