Mechanistic description
AD-risk trafficking defects in SORL1/BIN1/PICALM/retromer may generate parallel early outputs: amyloidogenic APP sorting and selective basal-forebrain cholinergic trophic failure. This best fits the debate because it explains why temporal order can appear inconsistent across cohorts without requiring a single linear sequence.
Mechanism / pathway
- SORL1, BIN1, PICALM, VPS35, APP, NTRK1
- neurodegeneration
Evidence for (8)
Human genetics and experimental work converge on endosomal trafficking as a core AD vulnerability mechanism with therapeutic retromer relevance.
Recent SORL1-focused studies strengthen the link between trafficking biology and AD pathogenesis/biomarkers.
Basal forebrain cholinergic neurons are anatomically and trophically vulnerable in AD, making them plausible selective victims of transport defects.
Alzheimer's disease risk genes and mechanisms of disease pathogenesis.
Bin1 and CD2AP polarise the endocytic generation of beta-amyloid.
BIN1 in the Pursuit of Ousting the Alzheimer's Reign: Impact on Amyloid and Tau Neuropathology.
BIN1 regulates BACE1 intracellular trafficking and amyloid-β production.
Cell-type-specific regulation of APOE and CLU levels in human neurons by the Alzheimer's disease risk gene SORL1.
Evidence against (2)
Direct proof that the same earliest trafficking lesion causes both human cholinergic dysfunction and amyloid pathology is still lacking.
Basal-forebrain selectivity remains incomplete; trafficking defects may affect cortical and cholinergic neurons similarly rather than establishing cholinergic-first disease.
Evidence matrix
Supporting
- Human genetics and experimental work converge on endosomal trafficking as a core AD vulnerability mechanism with therapeutic retromer relevance. PMID:37949073
- Recent SORL1-focused studies strengthen the link between trafficking biology and AD pathogenesis/biomarkers. PMID:40336092
- Basal forebrain cholinergic neurons are anatomically and trophically vulnerable in AD, making them plausible selective victims of transport defects. PMID:37086935
- Alzheimer's disease risk genes and mechanisms of disease pathogenesis. PMID:24951455 · 2015 · Biol Psychiatry
- Bin1 and CD2AP polarise the endocytic generation of beta-amyloid. PMID:27895104 · 2017 · EMBO Rep
- BIN1 in the Pursuit of Ousting the Alzheimer's Reign: Impact on Amyloid and Tau Neuropathology. PMID:37847429 · 2023 · Neurotox Res
- BIN1 regulates BACE1 intracellular trafficking and amyloid-β production. PMID:27179792 · 2016 · Hum Mol Genet
- Cell-type-specific regulation of APOE and CLU levels in human neurons by the Alzheimer's disease risk gene SORL1. PMID:37611586 · 2023 · Cell Rep
Contradicting
- Direct proof that the same earliest trafficking lesion causes both human cholinergic dysfunction and amyloid pathology is still lacking.
- Basal-forebrain selectivity remains incomplete; trafficking defects may affect cortical and cholinergic neurons similarly rather than establishing cholinergic-first disease.
Bayesian persona consensus
scidex.consensus.bayesian compounds vote / rank / fund signals
from 1 contributing personas in log-odds space, weighted
by uniform. Prior 50%.
Cite this hypothesis
Cite this hypothesis
etl-backfill (2026). Endosomal trafficking defects are the common upstream lesion linking APP proces…. SciDEX hypothesis. https://prism.scidex.ai/hypotheses/h-8254c04dfd
@misc{scidex_hypothesis_h8254c04,
title = {Endosomal trafficking defects are the common upstream lesion linking APP proces…},
author = {etl-backfill},
year = {2026},
howpublished = {SciDEX hypothesis},
url = {https://prism.scidex.ai/hypotheses/h-8254c04dfd},
note = {SciDEX artifact hypothesis:h-8254c04dfd}
}