AIF1 and supranuclear palsy, progressive, 1: We quantified the area of IBA1-TSPO and GFAP-TSPO co-localization (reflective of microglial and astrocytic TSPO levels, respectively) in posterior frontal lobe (BA6) tissue from neuropathologically confirmed PSP donors who had undergone 11CPK11195 PET during life,8,10 and control donors.