TSPO and Alzheimer disease: Similarly, compared to CTRL microglia, AD microglia appeared to exhibit higher levels of CD68, FTL, and TSPO, and slightly higher levels of MHC2 and TMEM119 (Fig. 2b); however, mixed effects regression models controlling for correlation within subjects only approached statistical significance for CD68 (p = 0.117) (see Table S3: Additional file 1).