PPARA and early-onset autosomal dominant Alzheimer disease: According to the KEGG pathway results, the DEGs were primarily linked to focal adhesion, the Wnt signaling pathway, vascular smooth muscle contraction, Alzheimer’s disease, non-alcoholic fatty liver disease, ribosome, the PPAR signaling pathway, viral protein with cytokine and cytokine receptor and cytokine–cytokine receptor interaction.