CHID1 and Alzheimer disease: As regards the AD patients’ brain regions, we observed significant differences in CHID1 expression levels by comparing the cerebellum (p = 0.001), temporal (p < 0.0001), cingulate (p = 0.001), occipital (p = 0.01), and prefrontal (p < 0.0001) brain regions with the diencephalon (Figure 6B).