IL6 and Alzheimer disease: Levels of neuroinflammatory cytokines interleukin-6(IL-6) and tumor necrosis factor-alpha (TNF-α), AD-related proteins amyloid precursor protein (APP) and microtubule-associated protein tau (MAPT),oxidative stress (MDA), and antioxidant capacity (SOD) were evaluated via quantitative PCR and Western blotting.