ArticlemedRxiv : the preprint server for health sciences2025
Arachnoid Granulation Morphologies Associate with β-Amyloid and Tau Pathology in Older Adults.
Article in medRxiv : the preprint server for health sciences, 2025. 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
introductionArachnoid granulations (AG) enlarge with age, yet limited studies evaluate AG in neurodegeneration. Here, we investigate associations of AG morphology with Alzheimer's disease (AD) pathology.
methodsMacroscopic AG properties were systematically evaluated along dorsal postmortem brain specimens from older adults (n=882). Regression models were used to analyze their associations with AD neuropathologic indices, controlling for demographic factors.
resultsParticipants died at mean age of 90.62 (SD=6.98) years. β-amyloid (Odds ratio/OR, 0.79 [95% CI, 0.66-0.95]) and neurofibrillary tangles (OR, 0.84 [95% CI, 0.71-0.98]) inversely associated with global AG count. Similarly, β-amyloid (OR, 0.78 [95% CI, 0.65-0.92]) and B (Braak) score (OR, 0.80 [95% CI, 0.66-0.96]) inversely associated with global AG patch count. DISCUSSION: β-amyloid and tau pathology are associated with AG morphologies. Future studies should explore the mechanisms underlying these associations across disease stage and demographic factors.
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