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DNA methylation is associated with hair trace elements in female adolescents from two vulnerable populations in the Colombian Caribbean. | LitMetric
Exposure to trace elements (TEs) influences DNA methylation patterns, which may be associated with disease development. Vulnerable populations, such as adolescents undergoing maturity, are susceptible to the effects of TE exposure. The aim of this study was to analyze the association of hair TE concentration with DNA methylation in a sample from female adolescents living in two communities in the Colombian Caribbean coast. Hair and blood samples were obtained from 45 females, between 13 and 16 years of age. Seventeen TEs were quantified in hair samples. DNA methylation was measured in leukocytes using the Infinium MethylationEPIC BeadChip. Linear models were employed to identify differentially methylated positions (DMPs) adjusting for age, body mass index, mother's education, and cell type composition. Among the tested elements, vanadium, chromium, nickel, copper, zinc, yttrium, tin, and barium were significantly associated with DMPs (false discovery rate < 0.05), registering 225, 1, 2, 184, 1, 209 189, and 104 hits, respectively. Most of the DMPs were positively associated with TEs and located in open sea regions. The greatest number of DMPs was annotated to the and genes, related to regulation of gene expression and oxidative stress, respectively. These findings suggest that DNA methylation may be involved in linking exposure to TEs among female adolescents to downstream health risks.
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