ArticleBrain and behavior2025
Genetically Predict Diet-derived Antioxidants and Risk of Neurodegenerative Diseases Among Individuals of European Descent: A Mendelian Randomization Study.
Article in Brain and behavior, 2025. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 4 papers.
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Who cites it
4 citing papers in PubMed.
- Redox Homeostasis as a Therapeutic Target in Chronic Oxidative Diseases: Implications for Cancer Treatment.Antioxidants (Basel, Switzerland) · 2026Review
- Causal Effects Between Neurodegenerative Diseases, Metabolites, and Brain Volume.Current Alzheimer research · 2026Article
- A Review of the Progress in the Microbial Biosynthesis of Prenylated Aromatic Compounds.Molecules (Basel, Switzerland) · 2025Review
- Genetically Predict Diet-derived Antioxidants and Risk of Neurodegenerative Diseases Among Individuals of European Descent: A Mendelian Randomization Study.Brain and behavior · 2025Article
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12 authors.
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Abstract
backgroundThe incidence of neurodegenerative disorders (NDDs) is increasing, and currently, there are no curative treatments available for these conditions. The potential benefits of supplementation with diet-derived antioxidants and their metabolites for NDDs remain a subject of debate. In this study, we employed a two-sample Mendelian randomization (MR) analysis to investigate the potential causal relationship between elevated circulating antioxidant levels and the risk of NDDs.
methodsWe used single-nucleotide polymorphisms (SNPs) related to diet-derived antioxidants and p < 1E-05 as instrumental variables (IVs). The NDDs we studied included Parkinson's disease (PD) (33,674 cases and 449,056 controls), Alzeimers disease (AD) (111,326 cases and 677,663 controls), amyotrophic lateral sclerosis (ALS) (27,205 cases and 110,881 controls), and frontotemporal dementia (FTD) (3526 cases and 9402 controls) from GWASs conducted in the European descent. Two-sample MR was performed together with a series of sensitivity analyses. The main statistical analyses were conducted using the package "TwoSampleMR (V.0.5.6)" in R (V.4.2.0).
resultsGenetically predicted levels of α-tocopherol and carotene were found to be associated with a reduced risk of ALS, with odds ratios (OR) of 0.45 (95% confidence interval [CI]: 0.31, 0.66; p = 3.97 × 10^-5) and 0.82 (95% CI: 0.68, 0.99; p = 0.0427), respectively. Similarly, vitamin E (OR 0.70; [95% CI 0.50, 0.98]; p = 0.0358) and ascorbate (OR 0.85; [95% CI: 0.73, 0.98]; p = 0.0216) demonstrated a protective effect against PD. Furthermore, elevated levels of retinol were associated with a reduced incidence of FTD, with an OR of 0.92 (95% CI: 0.86, 0.99; p = 0.0196), although they were also linked to an increased risk of ALS (OR 1.02 [95% CI 1.01, 1.04], p = 0.0017) and PD (OR 1.06 [95% CI 1.02, 1.09], p = 0.0121). No significant causal association was observed between circulating antioxidants and AD.
conclusionThis MR study indicated a potential protective effect of α-tocopherol and carotene on ALS, vitamin E and ascorbate on PD, and retinol on FTD, while also identifying retinol as a risk factor for ALS and PD. These findings could contribute to the exploration of dietary therapies for NDDs. Further research is necessary to substantiate the potential associations between diet-derived antioxidants or their metabolites and the risk of NDDs in individuals.
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