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Mol Nutr Food Res. 2018 Dec;62(23):e1800092. doi: 10.1002/mnfr.201800092. Epub 2018 Nov 2.

Dietary Intervention Modifies DNA Methylation Age Assessed by the Epigenetic Clock.

Author information

1
Human Nutrition Research Centre, Institute of Cellular Medicine, Newcastle University, Newcastle Upon Tyne, NE2 4HH, UK.
2
Research division, Faculty of Medicine, Siriraj Hospital, Mahidol University, Bangkok, 10700, Thailand.
3
Faculty of Health Sciences and Wellbeing, University of Sunderland, Sunderland, SR1 3SD, UK.
4
Department of Food & Nutritional Sciences, University of Reading, Whiteknights, RG6 6UR, UK.
5
EPIGET - Epidemiology, Epigenetics and Toxicology Lab, Department of Clinical Sciences and Community Health, University of Milan, Milano, 20122, Italy.

Abstract

SCOPE:

Alterations in DNA methylation patterns are correlated with aging, environmental exposures, and disease pathophysiology; the possibility of reverting or preventing these processes through dietary intervention is gaining momentum. In particular, methyl donors that provide S-adenosyl-methionine for one-carbon metabolism and polyphenols such as flavanols that inhibit the activity of DNA methyltransferases (DNMTs) can be key modifiers of epigenetic patterns.

METHODS AND RESULTS:

DNA methylation patterns are assessed in publicly available Illumina Infinium 450K methylation datasets from intervention studies with either folic acid + vitamin B12 (GSE74548) or monomeric and oligomeric flavanols (MOF) (GSE54690) in 44 and 13 participants, respectively. Global DNA methylation levels are increased in unmethylated regions such as CpG islands and shores following folic acid + vitamin B12 supplementation and decreased in highly methylated regions, including shelves and open-seas, following intervention with MOF. After supplementation with folic acid + vitamin B12, epigenetic age, estimated by the Horvath "epigenetic clock" model, is reduced in women with the MTHFR 677CC genotype.

CONCLUSIONS:

The effects of supplementation with folic acid + vitamin B12 and MOF on DNA methylation age are dependent upon gender and MTHFR genotype. Additionally, the findings demonstrate the potential for these dietary factors to modulate global DNA methylation profiles.

KEYWORDS:

450K; DNA methylation; DNAm age; flavanols; folic acid; vitamin B12

PMID:
30350398
DOI:
10.1002/mnfr.201800092
[Indexed for MEDLINE]

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