TREM2-ABI3 actin-phagocytosis coupling is a higher-yield AD target than either…

Mechanistic description

TREM2 R47H and ABI3 rs616338 are both AD risk loci linked to microglial response, phagocytosis, and cytoskeletal remodeling. The notebook prioritizes them as a convergent module rather than isolated targets. Hypothesis: restoring TREM2-dependent lipid sensing together with ABI3-linked actin remodeling will rescue plaque engagement and debris clearance more robustly than modulating either locus alone in human iPSC-microglia.

Mechanism / pathway

TREM2/ABI3
→
microglial phagocytosis and actin remodeling
→
Alzheimer's disease

Evidence for (7)

TREM2 R47H has a high AD risk odds-ratio proxy and ABI3 rs616338 is a replicated rare risk locus.

dataset:ad_genetic_risk_loci
Enrichment and druggability scoring group TREM2 and ABI3 with microglial immune/phagocytic biology.

notebook:gwas-ad-risk-loci-analysis
Rare coding variants in PLCG2, ABI3, and TREM2 implicate microglial-mediated innate immunity in Alzheimer's disease.

PMID:28714976 2017 Nat Genet
Transethnic meta-analysis of rare coding variants in PLCG2, ABI3, and TREM2 supports their general contribution to Alzheimer's disease.

PMID:30705288 2019 Transl Psychiatry
Examination of the Effect of Rare Variants in TREM2, ABI3, and PLCG2 in LOAD Through Multiple Phenotypes.

PMID:32894242 2020 J Alzheimers Dis
Deletion of Abi3/Gngt2 influences age-progressive amyloid β and tau pathologies in distinctive ways.

PMID:35897046 2022 Alzheimers Res Ther
Microglia express ABI3 in the brains of Alzheimer's disease and Nasu-Hakola disease.

PMID:29259854 2017 Intractable Rare Dis Res

Evidence against (1)

Joint modulation could be context-dependent and may not translate from iPSC-microglia to aged human brain microglia.

notebook:gwas-ad-risk-loci-analysis

Evidence matrix

7 supporting 1 contradicting

88% supporting

Supporting

TREM2 R47H has a high AD risk odds-ratio proxy and ABI3 rs616338 is a replicated rare risk locus. dataset:ad_genetic_risk_loci
Enrichment and druggability scoring group TREM2 and ABI3 with microglial immune/phagocytic biology. notebook:gwas-ad-risk-loci-analysis
Rare coding variants in PLCG2, ABI3, and TREM2 implicate microglial-mediated innate immunity in Alzheimer's disease. PMID:28714976 · 2017 · Nat Genet
Transethnic meta-analysis of rare coding variants in PLCG2, ABI3, and TREM2 supports their general contribution to Alzheimer's disease. PMID:30705288 · 2019 · Transl Psychiatry
Examination of the Effect of Rare Variants in TREM2, ABI3, and PLCG2 in LOAD Through Multiple Phenotypes. PMID:32894242 · 2020 · J Alzheimers Dis
Deletion of Abi3/Gngt2 influences age-progressive amyloid β and tau pathologies in distinctive ways. PMID:35897046 · 2022 · Alzheimers Res Ther
Microglia express ABI3 in the brains of Alzheimer's disease and Nasu-Hakola disease. PMID:29259854 · 2017 · Intractable Rare Dis Res

Contradicting

Joint modulation could be context-dependent and may not translate from iPSC-microglia to aged human brain microglia. notebook:gwas-ad-risk-loci-analysis

Cite this hypothesis

Citation

etl-backfill (2026). TREM2-ABI3 actin-phagocytosis coupling is a higher-yield AD target than either…. SciDEX hypothesis. https://prism.scidex.ai/hypotheses/h-gwas-trem2-abi3-phagocytosis-5dee99f5

BibTeX

@misc{scidex_hypothesis_hgwastre,
  title        = {TREM2-ABI3 actin-phagocytosis coupling is a higher-yield AD target than either…},
  author       = {etl-backfill},
  year         = {2026},
  howpublished = {SciDEX hypothesis},
  url          = {https://prism.scidex.ai/hypotheses/h-gwas-trem2-abi3-phagocytosis-5dee99f5},
  note         = {SciDEX artifact hypothesis:h-gwas-trem2-abi3-phagocytosis-5dee99f5}
}