Only four proteins were significantly upregulated in AD, with a false discovery rate cut‐off of 0.10 (Figure 5a): Amyloid precursor protein (App), vitronectin (Vtn), dedicator of cytokinesis protein 9 (Dock9), and complement C1q, subcomponent subunit C (C1qc) (Table S23). This evidence concerns the gene C1QC and Alzheimer disease.