Compartment-Specific Inhibition of Cytosolic Cathepsin B Mitigates Microglial Senescence in the Aging Brain.
Microglial senescence is a hallmark of brain aging, but how lysosomal dysfunction fuels their pro-aging activity remains unresolved. Here we identify cytosolic Cathepsin B (CatB) as a pivotal driver of microglial senescence. In aged mice and senescence-induced models, lysosomal membrane permeabilization releases CatB i...