IGFBP7 and frontotemporal dementia: 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.