PCDH9 and Alzheimer disease: Of all the AD DEGs (Table 1), 103 (43%) were included in this list, with Srgap1, Lrfn5, Myt1l, Kndc1, Pcsk2, Cacna2d3, Prkar1b, Pcdh9, Mei1, Foxp2, Lin7a, Pth2r, St8sia3, Slc17a7, Rbp4, and Etv4 as significantly reversed in the opposite direction of expression in wild-type mice relative to 3xTg-AD.