DNA methylation in genes of longevity‐regulating pathways: association with obesity and metabolic complications
Keywords: 
Epigenetics
Aging
Metabolic syndrome
Obesity
Insulin resistance
Issue Date: 
2019
Publisher: 
Impact Journals, LLC
ISSN: 
1945-4589
Note: 
This is an open‐access article distributed under the terms of the Creative Commons Attribution License (CC BY 3.0), which permits unrestricted use, distribution, and reproduction in any medium, provided the original author and source are credited.
Citation: 
Salas-Pérez, F. (Francisca); Ramos-López, O. (Omar); Mansego-Talavera, M.L. (María Luisa); et al. "DNA methylation in genes of longevity‐regulating pathways: association with obesity and metabolic complications". Aging. 11 (6), 2019, 1874 - 1899
Abstract
Aging is the main risk factor for most chronic diseases. Epigenetic mechanisms, such as DNA methylation (DNAm) plays a pivotal role in the regulation of physiological responses that can vary along lifespan. The aim of this research was to analyze the association between leukocyte DNAm in genes involved in longevity and the occurrence of obesity and related metabolic alterations in an adult population. Subjects from the MENA cohort (n=474) were categorized according to age (<45 vs 45>) and the presence of metabolic alterations: increased waist circumference, hypercholesterolemia, insulin resistance, and metabolic syndrome. The methylation levels of 58 CpG sites located at genes involved in longevity‐regulating pathways were strongly correlated (FDR‐ adjusted< 0.0001) with BMI. Fifteen of them were differentially methylated (p<0.05) between younger and older subjects that exhibited at least one metabolic alteration. Six of these CpG sites, located at MTOR (cg08862778), ULK1 (cg07199894), ADCY6 (cg11658986), IGF1R (cg01284192), CREB5 (cg11301281), and RELA (cg08128650), were common to the metabolic traits, and CREB5, RELA, and ULK1 were statistically associated with age. In summary, leukocyte DNAm levels of several CpG sites located at genes involved in longevity‐ regulating pathways were associated with obesity and metabolic syndrome traits, suggesting a role of DNAm in aging‐related metabolic alterations.

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