ArticleAlzheimer's & dementia : the journal of the Alzheimer's Association2025
Association and interaction of blood homocysteine and p-tau217 levels with temporal cortical thinning and cognitive impairment in Alzheimer's disease.
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, 1 of them a synthesis that pooled it.
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Who cites it
3 citing papers in PubMed, 1 synthesis or guideline pooled it.
- From Cerebrospinal Fluid to Blood Draw: Plasma p-Tau217 as a Non-Invasive Biomarker for Alzheimer's Disease: A Fagan Nomogram-Based Meta-Analytic Study.Molecular neurobiology · 2026Pooled it
- Cystathionine γ-lyase is a major regulator of cognitive function through neurotrophin signaling and neurogenesis.Proceedings of the National Academy of Sciences of the United States of America · 2025Article
- Association and interaction of blood homocysteine and p-tau217 levels with temporal cortical thinning and cognitive impairment in Alzheimer's disease.Alzheimer's & dementia : the journal of the Alzheimer's Association · 2025Article
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Authors and funding
33 authors.
Funding
Abstract
introductionThe relationships between blood homocysteine (Hcy), amyloid beta (Aβ), tau pathology, and their combined effects on cortical thinning and cognitive impairment in Alzheimer's disease (AD) remain poorly understood.
methodsParticipants were stratified into Aβ+ and Aβ- groups by positron emission tomography. Blood levels of Hcy, AD biomarkers (phosphorylated tau-217 [p-tau217], p-tau181, and Aβ), cortical thickness (via magnetic resonance imaging), and cognitive performance were assessed.
resultsAβ+ individuals exhibited increased blood Hcy and p-tau217 levels, which negatively correlated with temporal cortical thickness and cognitive function. A significant interaction between Hcy and p-tau217 was observed in Aβ+ participants, with high Hcy exacerbating the detrimental effects of p-tau217 on temporal cortical thinning and cognitive deficits. In Aβ- individuals, Hcy levels were independently associated with tau pathology. DISCUSSION: Increased Hcy and p-tau217 levels synergistically contribute to cortical thinning and cognitive impairment, highlighting that Hcy may be a modifiable risk factor for AD progression. Highlights Increased blood levels of homocysteine (Hcy) and phosphorylated tau-217 (p-tau217) are independently and interactively associated with temporal cortical thinning and cognitive deficits. Hcy may predominantly affect tau pathology compared to amyloid aggregation, with its impact on neurodegeneration depending on coexisting pathologies. Hcy may serve as a supplementary indicator rather than as an independent predictor in Alzheimer's disease. Hcy may serve as a modifiable risk factor, whereas p-tau217 as a superior diagnostic biomarker and potential therapeutic target.
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