ArticleAlzheimer's & dementia : the journal of the Alzheimer's Association2026
Cell-based polygenic risk scores predict clinical progression and prioritize network-based therapeutic targets in Alzheimer's disease.
Article in Alzheimer's & dementia : the journal of the Alzheimer's Association, 2026. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Not yet cited in PubMed.
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Abstract
backgroundLate-onset Alzheimer's disease (AD) exhibits substantial biological heterogeneity. We developed a framework linking cell-type-specific polygenic risk profiles to precision medicine in AD.
methodsCell-based polygenic risk scores (cbPRSs) derived from single-nucleus RNA-seq co-expression networks were evaluated in Alzheimer's Disease Neuroimaging Initiative (ADNI) and Framingham Heart Study (FHS) cohorts. Network hubs were prioritized using a graph-based PageRank algorithm and candidate drugs were validated in human-induced pluripotent stem cell (hiPSC)-derived astrocytes.
resultsCell-based PRS analysis identified two genetic risk axes independent of network cell-type labels: an apolipoprotein E (APOE)-concentrated axis (Ast-M2/Oli-M45) and an APOE-independent axis (Ast-M10/Oli-M50), which predicted accelerated progression to AD (hazard ratio: 1.25-2.02) and correlated with localized temporal lobe atrophy, reduced glucose metabolism, and global amyloid burden. High-risk status specifically upregulated complement C4a protein expression in postmortem brains. PageRank network analysis identified four candidate drugs targeting the APOE-containing astrocyte network. Experimental treatment with estradiol and levetiracetam significantly reduced APOE and complement C4 gene expression in hiPSC-derived astrocytes. DISCUSSION: By integrating cell-based genetic risk with network-level target prioritization, this framework enables robust patient stratification and experimental target validation.
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