ArticleAlzheimer's & dementia : the journal of the Alzheimer's Association2025
Alzheimer's disease plasma biomarkers in the Midwestern Amish.
Article in Alzheimer's & dementia : the journal of the Alzheimer's Association, 2025. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 3 papers.
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Who cites it
3 citing papers in PubMed.
- A longitudinal study of age-related traits and cognitive function: The Collaborative Amish Aging and Memory Project (CAAMP).medRxiv : the preprint server for health sciences · 2026Article
- Evidence for reduced somatic T-cell receptor sequence diversity profiles among Midwestern Amish in an aging cohort study.medRxiv : the preprint server for health sciences · 2026Article
- Alzheimer's disease plasma biomarkers in the Midwestern Amish.Alzheimer's & dementia : the journal of the Alzheimer's Association · 2025Article
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26 authors.
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Abstract
introductionAlzheimer's disease (AD) plasma biomarkers are non-invasive measures of the key amyloid beta (Aβ) and tau pathologies. Validation and generalization studies are needed to fully understand their potential for AD prediction and diagnosis in the elderly population.
methodsIn 1067 Amish individuals aged ≥ 65, we measured plasma Aβ and tau to assess their relationships with AD-related outcomes.
resultsAmong Amish individuals with AD, plasma phosphorylated tau protein at epitope 181 (p-tau181) was significantly higher (p = 0.04), and plasma Aβ42/p-tau181 ratio was significantly lower (p = 0.01) than cognitively normal individuals. The association of AD with elevated p-tau181 was driven by apolipoprotein E (APOE) ε4 carriers (odds ratio = 6.02, p < 0.001). Cluster analysis identified two subgroups defined by differing Aβ and tau levels, with the high-risk cluster having more APOE ε4 carriers (p < 0.001). DISCUSSION: Plasma biomarkers, particularly p-tau181, Aβ42/Aβ40, and Aβ42/p-tau181 ratio, are promising surrogate biomarkers for AD-related pathology and clinical outcomes in the Amish.
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