DNA methylation variant, B-vitamins intake and longitudinal change in body mass index.

International Journal of Obesity : Journal of the International Association for the Study of Obesity
Xiang LiLu Qi

Abstract

Growing evidence has implicated DNA methylation (DNAm) in the regulation of body adiposity; a recent epigenome-wide association study (EWAS) identified a genetic variant determining DNAm at the SREBF1 gene that affected body mass index (BMI). In the present study, we tested interactions between DNAm variant rs752579 and methylation metabolism-related B-vitamins (folate, vitamin B2, vitamin B6, and vitamin B12) on longitudinal change in BMI in the Women's Health Initiative Memory Study (WHIMS). A total of 5687 white women aged 65-79 from WHIMS with genotyping data on SNP rs752579 were included in the analysis. B-vitamins intakes were estimated by a self-report semi-quantitative food frequency questionnaire. BMI was measured at baseline and 6-year follow-up. We found significant interactions between the SREBF1 rs752579 genotype and intake of food source B-vitamins on 6-year change in BMI (p interaction <0.01 for all). BMI changes (kg/m2) per DNAm-increasing (C) allele were -0.29, 0.06, and 0.11 within subgroups of increasing tertiles of food source folate intake; and the corresponding BMI changes (kg/m2) were -0.25, -0.01, and 0.15 for vitamin B2 intake; -0.17, -0.16, and 0.21 for vitamin B6 intake; and -0.12, -0.23, and 0.26 for...Continue Reading

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Oct 13, 2020·Critical Reviews in Food Science and Nutrition·Jianmin WuXi Ma

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