Mechanistic description
Loss of retrograde NGF-TrkA support could destabilize basal-forebrain cholinergic neurons early, lowering cortical acetylcholine tone and secondarily biasing APP processing and tau susceptibility. This remains plausible and clinically relevant, but current support is more inferential than decisive.
Evidence for (7)
Human basal forebrain cholinergic vulnerability is well documented and compatible with early trophic-signaling failure.
Clinical neurotrophin translation work suggests degenerating human neurons can remain trophically responsive, preserving therapeutic relevance.
Exercise therapy to prevent and treat Alzheimer's disease.
Nerve growth factor (NGF) pathway biomarkers in Down syndrome prior to and after the onset of clinical Alzheimer's disease: A paired CSF and plasma study.
Aberrant tau phosphorylation and neurite retraction during NGF deprivation in PC12 cells.
Alzheimer's Disease: An Update and Insights Into Pathophysiology.
Depression like-behavior and memory loss induced by methylglyoxal is associated with tryptophan depletion and oxidative stress: a new in vivo model of neurodegeneration.
Evidence against (2)
Reduced NGF/TrkA signaling may be secondary to tau, synapse loss, or endosomal stress rather than the initiating lesion.
No validated circulating biomarker currently establishes NGF/TrkA failure as preceding soluble amyloid or seed-competent tau in humans.
Bayesian persona consensus
scidex.consensus.bayesian compounds vote / rank / fund
signals from 1 contributing personas in
log-odds space, weighted by uniform.
Prior 50%.