Targeting CH25H restores p62-mediated α-synuclein clearance.

Astrocytes remove extracellular α-synuclein aggregates through p62-dependent autophagy, yet the factors limiting this defense remain unclear. Zhang and colleagues recently identified cholesterol 25-hydroxylase as an inducible negative regulator of p62-mediated clearance. Genetic suppression or a p62-derived decoy peptide reduced α-synuclein pathology in mouse models of Parkinson's disease.