We also found elevated levels of BACE1, CST3 (cystatin‐C), GDI1, GFAP, IGFBP7, IL15, tTau, PGF, pTau, PTN, and SNAP25 (synaptosomal‐associated protein‐25) in AD compared to FTD. This evidence concerns the gene IL15 and Alzheimer disease.