Mechanistic description
Dying or stressed neurons release alpha-synuclein and DAMPs that activate microglia, which then generate superoxide through NOX2 and amplify TNF, IL1B, and NF-kB signaling. That extracellular ROS and cytokine field injures neighboring neurons, causing more aggregate release and renewed microglial activation. This best explains tissue-level spread and persistence rather than the earliest intracellular trigger.
Evidence for (3)
NOX2 is upregulated in PD substantia nigra and knockout models are protected from toxin-induced degeneration.
NOX2-derived ROS are required for alpha-synuclein-induced microglial activation and dopaminergic toxicity.
Specific NOX2 inhibitors show efficacy in neuroinflammatory models, supporting tractability.
Evidence against (2)
Microglial activation may be secondary and better explains propagation than the initiating intracellular vicious cycle.
Protection in toxin models may overstate inflammatory dependence relative to idiopathic PD.
Bayesian persona consensus
scidex.consensus.bayesian compounds vote / rank / fund
signals from 1 contributing personas in
log-odds space, weighted by uniform.
Prior 50%.