What signals trigger microglia to specifically recognize and phagocytose LC axons in early AD?

The study shows that OB microglia phagocytose LC axons before amyloid plaque formation, but the molecular signals that mark these axons for destruction are unknown. Understanding this mechanism could reveal early therapeutic targets to prevent noradrenergic denervation. Gap type: unexplained_observation Source paper: Early Locus Coeruleus noradrenergic axon loss drives olfactory dysfunction in Alzheimer's disease. (2025, Nature communications, PMID:40781079)

archived neuroinflammation Created Apr 14, 2026

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