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Nutrients 2014, 6(10), 4625-4639; doi:10.3390/nu6104625

Nutrients Intake Is Associated with DNA Methylation of Candidate Inflammatory Genes in a Population of Obese Subjects

1
Center of Molecular and Genetic Epidemiology, Department of Clinical Sciences and Community Health, Università degli Studi di Milano, Milan 20122, Italy
2
Epidemiology Unit, Fondazione IRCCS Ca' Granda Ospedale Maggiore Policlinico, Milan 20122, Italy
3
Laboratory of Environmental Epigenetics, Exposure Epidemiology and Risk Program, Harvard School of Public Health, Boston, MA 02115, USA
4
Worker's Health Protection and Promotion Unit, Fondazione IRCCS Ca' Granda Ospedale Maggiore Policlinico, Milan 20122, Italy
5
Laboratory of Clinical Chemistry & Microbiology, Fondazione IRCCS Ca' Granda Ospedale Maggiore Policlinico, Milan 20122, Italy
*
Author to whom correspondence should be addressed.
Received: 11 July 2014 / Revised: 14 October 2014 / Accepted: 15 October 2014 / Published: 22 October 2014
(This article belongs to the Special Issue Nutritional Epigenetics)
View Full-Text   |   Download PDF [198 KB, uploaded 23 October 2014]

Abstract

The aim of the present study was to evaluate the potential association between dietary nutrients and alterations in DNA methylation in a set of five candidate genes, including CD14, Et-1, iNOS, HERV-w and TNFα, in a population of overweight/obese subjects. We evaluated possible associations between gene methylation and clinical blood parameters, including total cholesterol (TC), low- and high-density lipoprotein cholesterol (LDL-C and HDL-C), triglyceride and homocysteine levels. We employed validated methods to assess anthropometric, clinical and dietary data, as well as pyrosequencing to evaluate DNA methylation of the five candidate genes in 165 overweight/obese subjects. There was no association between body mass index and DNA methylation of the five candidate genes in this group of subjects. Positive associations were observed between TNFα methylation and blood levels of LDL-C (β = 0.447, p = 0.002), TC/HDL-C (β = 0.467, p = 0.001) and LDL-C/HDL-C (β = 0.445, p = 0.002), as well as between HERV-w methylation and dietary intakes of β-carotene (β = 0.088, p = 0.051) and carotenoids (β = 0.083, p = 0.029). TNFα methylation showed negative associations with dietary intakes of cholesterol (β = −0.278, p = 0.048), folic acid (β = −0.339, p = 0.012), β-carotene (β = −0.332, p = 0.045), carotenoids (β = −0.331, p = 0.015) and retinol (β = −0.360, p = 0.008). These results suggest a complex relationship among nutrient intake, oxidative stress and DNA methylation. View Full-Text
Keywords: DNA methylation; CD14; Et-1; iNOS; HERV-w; TNFα; nutrients DNA methylation; CD14; Et-1; iNOS; HERV-w; TNFα; nutrients
This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited. (CC BY 4.0).

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MDPI and ACS Style

Bollati, V.; Favero, C.; Albetti, B.; Tarantini, L.; Moroni, A.; Byun, H.-M.; Motta, V.; Conti, D.M.; Tirelli, A.S.; Vigna, L.; Bertazzi, P.A.; Pesatori, A.C. Nutrients Intake Is Associated with DNA Methylation of Candidate Inflammatory Genes in a Population of Obese Subjects. Nutrients 2014, 6, 4625-4639.

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