COX7A1 and Alzheimer disease: Compared to the analysis of PDR and AD, the expressions of APP, COX7A1, and BAD genes displayed a more consistent correlation in PDR than in AD, which may be due to the lower expression of COX7A1 and BAD in the vasculature from the AD hippocampus (Figures 10E,F; Supplementary Tables S13, S14).