Brain HealthDeclining ULK1 Protein Links Autophagy Failure to Alzheimer's Progression
ULK1 is a key protein that kicks off the cellular cleanup processes of autophagy and mitophagy. This study found that ULK1 levels fall with normal aging and drop further in Alzheimer's disease patients, measured in both blood and cerebrospinal fluid. When researchers boosted ULK1 in Alzheimer's mice, the animals showed less amyloid buildup, reduced toxic tau tangles, better mitochondrial health, and improved memory. The mechanism involves a cascade where better mitophagy raises NAD+ levels, which then activates SIRT1 to deacetylate and neutralize a toxic form of tau. These findings were validated in worm and cell models using ULK1-activating compounds. The research positions ULK1 as a promising drug target for Alzheimer's prevention and treatment.
