Noradrenergic-Tau Propagation Blockade

**Molecular Mechanism and Rationale** The α2A-adrenergic receptor (ADRA2A) represents a critical nexus in the pathophysiology of neurodegenerative diseases, particularly through its dual regulation of sleep architecture and tau protein propagation. The locus coeruleus (LC), the brain's primary noradrenergic nucleus, exhibits selective vulnerability in Alzheimer's disease and related tauopathies, with neuronal loss beginning decades before clinical symptom onset. The ADRA2A receptor functions as...