Further GO enrichment analysis revealed that AD pathology‐related differential molecules were mainly involved in platelet activation, VEGFA−VEGFR2 signaling pathway, AD, MAPK signaling pathway, glucagon signaling pathway, and biological processes such as blood coagulation, cell components such as focal adhesion, and molecular functions such as calcium ion binding (Figure 3D). The gene discussed is GCG; the disease is Alzheimer disease.