ArticleGenes & nutrition2026
Epigenetic mediators of diet and lifestyle and insulin resistance.
Article in Genes & nutrition, 2026. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Not yet cited in PubMed.
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Abstract
backgroundImplementing personalized dietary interventions has become important as emerging evidence indicates that dietary and lifestyle-dependent epigenetic modifications affect insulin resistance.
methodsAn epigenome-wide association study (EWAS) was conducted on 1,684 non-diabetic adults aged 57-75 from the Framingham Offspring Study (FOS). Associations between dietary and lifestyle factors (assessed via food frequency questionnaire) and DNA methylation sites (DNA-MS) were analyzed, with adjustments for confounders (age, sex, lifestyle) and multiple testing. Significant epigenetic mediators were evaluated using causal mediation models. Validation was executed using the Genetics of Lipid-Lowering Drugs and Diet Network Study (n = 945).
resultsThe EWAS identified 35 DNA-MS linked to HOMA-IR, with 13 DNA-MS showing significant associations with dietary factors in the FOS. Key DNA-MS including cg17901584 (DHCR24), influenced by brown rice (natural indirect effect: β ± SE, -0.02 ± 0.01, p = 0.0003), cg22761431 (EFNB3) by wheat germ (-0.01 ± 0.003, p = 0.001), and cg00574958 (CPT1A) associated with lactose (-0.001 ± 0.0003, p = 0.0001) intakes, all correlated with decreased HOMA-IR. Other DNA-MS, cg06808571 (KCNH2), cg06690548 (SLC7A11), and intergenic cg07504977, mediated increases in HOMA-IR linked to intakes of low-calorie cola (0.003 ± 0.001, p = 0.001), alcohol (0.01 ± 0.001, p = 9.0E-11), and palmitoleic acid (0.03 ± 0.01, p = 9.0E-05), respectively. In the GOLDN study, alcohol intake mediated by cg06690548 methylation in SLC7A11 was positively associated with HOMA-IR. Notably, the DHCR24 gene, crucial for cholesterol biosynthesis, was highlighted as a potential dietary target for reducing metabolic risk.
conclusionThe identification of specific DNA methylation sites, such as those in DHCR24 and EFNB3, provides supportive evidence for the mechanistic basis of known dietary effects on metabolic health. These findings not only reinforce the importance of diet in managing insulin resistance but also open avenues for personalized dietary interventions tailored to an individual's epigenetic profile.
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