Brain HealthYouth protein TIMP2 helps aging brain immune cells clear debris and calm inflammation
Brain aging may be slowed by a protein tied to youth. Researchers at the Icahn School of Medicine at Mount Sinai found that TIMP2 helps keep microglia, the brain's immune cells, working well. Microglia clear cellular waste, support the connections between neurons, and respond to injury. With age they often falter and shift into inflammatory states linked to neurodegeneration. In mice, removing TIMP2 pushed microglia toward aging-like and disease-like traits. When the team restored TIMP2 in the bloodstream of older mice, microglia got better at clearing debris and showed fewer molecular signs of inflammation and other harmful changes. The work, published in Nature Communications, points to TIMP2 as a possible lever for protecting the aging brain and, down the road, for Alzheimer's disease. It is early, mouse-based research, so it does not yet translate into a treatment for people.
