Impact of in Utero Folate Exposure on Dna Methylation and Its Potential Relevance for Later‐Life Health – Evidence from Mouse Models Translated to Human Cohorts

Dieuwertje E. Kok, Rebecca C. Richmond, Michiel Adriaens, Chris T. Evelo, Dianne Ford, John C. Mathers, Natassia Robinson, Jill McKay*

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

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Abstract

Scope: Persistent DNA methylation changes may mediate effects of early-life exposures on later-life health. Human lifespan is challenging for prospective studies, therefore data from longitudinal studies are limited. Projecting data from mouse models of early-life exposure to human studies offers a tool to address this challenge. Methods and Results: C57BL/6J mice were fed low/normal folate diets before and during pregnancy and lactation. Genome-wide promoter methylation was measured in male offspring livers at 17.5 days gestation and 28 weeks. Eight promoters were concurrently hypermethylated by folate depletion in fetuses and adults (>1.10 fold-change; p < 0.05). Processes/pathways potentially influenced by global changes, and function of these eight genes, suggest neurocognitive effects. Human observational and randomized controlled trial data were interrogated for translation. Methylation at birth was inversely associated with maternal plasma folate in six genes (−1.15% to −0.16% per nmol L −1; p < 0.05), while maternal folic acid supplementation was associated with differential methylation of four genes in adulthood. Three CpGs were persistently hypermethylated with lower maternal folate (p = 0.04). Conclusion: Some persistent folate-induced methylation changes in mice are mirrored in humans. This demonstrates utility of mouse data in identifying human loci for interrogation as biomarkers of later-life health.

Original languageEnglish
Article number2100789
Pages (from-to)1-9
Number of pages9
JournalMolecular Nutrition & Food Research
Volume66
Issue number3
Early online date13 Dec 2021
DOIs
Publication statusPublished - 1 Feb 2022

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