Network Analysis of the Potential Role of DNA Methylation in the Relationship Between Plasma Carotenoids and Lipid Profile

Overview

Journal Nutrients

Date 2019 Jun 7

PMID 31167428

Citations 11

Authors

Benedicte L Tremblay

Frederic Guenard

Benoit Lamarche

Louis Perusse

Marie-Claude Vohl

Affiliations

Soon will be listed here.

Abstract

Variability in plasma carotenoids may be attributable to several factors including genetic variants and lipid profile. Until now, the impact of DNA methylation on this variability has not been widely studied. Weighted gene correlation network analysis (WGCNA) is a systems biology method used for finding gene clusters (modules) with highly correlated methylation levels and for relating them to phenotypic traits. The objective of the present study was to examine the role of DNA methylation in the relationship between plasma total carotenoid concentrations and lipid profile using WGCNA in 48 healthy subjects. Genome-wide DNA methylation levels of 20,687 out of 472,245 CpG sites in blood leukocytes were associated with total carotenoid concentrations. Using WGCNA, nine co-methylation modules were identified. A total of 2734 hub genes (17 unique top hub genes) were potentially related to lipid profile. This study provides evidence for the potential implications of gene co-methylation in the relationship between plasma carotenoids and lipid profile. Further studies and validation of the hub genes are needed.

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