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European Journal of Nutrition

Erschienen in:

18.12.2017 | Original Contribution

Effects of folic acid supplementation on cognitive function and Aβ-related biomarkers in mild cognitive impairment: a randomized controlled trial

verfasst von: Fei Ma, Qing Li, Xuan Zhou, Jiangang Zhao, Aili Song, Wen Li, Huan Liu, Weili Xu, Guowei Huang

Erschienen in: European Journal of Nutrition | Ausgabe 1/2019

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Abstract

Purpose

Observational studies have frequently reported that low blood folate concentrations are associated with poor cognitive performance. Our previous studies have shown the potential beneficial effect on the metabolite levels of methionine cycle and peripheral blood inflammatory cytokines from 6- and 12-month folic acid supplementation on cognitive function in mild cognitive impairment (MCI). This study aims to continue exploring the effect of 24-month folic acid supplementation on cognitive function and pathological mechanism in MCI.

Methods

180 individuals with MCI were identified and randomly divided into intervention (folic acid 400 µg/day, n = 90) and convention (n = 90) groups. Cognitive function (WAIS-RC) and blood Aβ-related biomarkers were measured at baseline and at 6, 12, 18, and 24 months. Data were analyzed using generalized estimating equation. This trial has been registered with Trial Number: ChiCTR-TRC-13003227.

Results

During the follow-up, scores of full scale IQ, verbal IQ, and subdomains of Information and Digit Span were significantly higher in the intervention group than those in the convention group (P < 0.05). In the intervention group, blood homocysteine, S-adenosylhomocysteine (SAH), Aβ-42, and the expression of APP-mRNA were decreased (P < 0.05), while S-adenosylmethionine (SAM), SAM/SAH ratio, and the expression of DNA methyltransferase mRNA were increased (P < 0.05).

Conclusion

Folic acid supplementation appears to improve cognitive function and reduce blood levels of Aβ-related biomarkers in MCI. Larger-scale double-blind placebo-controlled randomized trials of longer duration are needed.

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Titel: Effects of folic acid supplementation on cognitive function and Aβ-related biomarkers in mild cognitive impairment: a randomized controlled trial
verfasst von: Fei Ma
Qing Li
Xuan Zhou
Jiangang Zhao
Aili Song
Wen Li
Huan Liu
Weili Xu
Guowei Huang
Publikationsdatum: 18.12.2017
Verlag: Springer Berlin Heidelberg
Erschienen in: European Journal of Nutrition / Ausgabe 1/2019
Print ISSN: 1436-6207
Elektronische ISSN: 1436-6215
DOI: https://doi.org/10.1007/s00394-017-1598-5

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Effects of folic acid supplementation on cognitive function and Aβ-related biomarkers in mild cognitive impairment: a randomized controlled trial

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