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Influence of Prenatal Arsenic Exposure and Newborn Sex on Global Methylation of Cord Blood DNA

Open access
Pilsner, J. Richard, Hall, Megan N., Liu, Xinhua, Ilievski, Vesna, Slavkovich, Vesna, Levy, Diane, Factor-Litvak, Pam, Yunus, Mahammad, Rahman, Mahfuzar, Graziano, Joseph H., Gamble, Mary V.·2012·PLoS ONE
DOI 10.1371/journal.pone.0037147
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Abstract

BACKGROUND: An emerging body of evidence indicates that early-life arsenic (As) exposure may influence the trajectory of health outcomes later in life. However, the mechanisms underlying these observations are unknown. OBJECTIVE: The objective of this study was to investigate the influence of prenatal As exposure on global methylation of cord blood DNA in a study of mother/newborn pairs in Matlab, Bangladesh. DESIGN: Maternal and cord blood DNA were available from a convenience sample of 101 mother/newborn pairs. Measures of As exposure included maternal urinary As (uAs), maternal blood As (mbAs) and cord blood As (cbAs). Several measures of global DNA methylation were assessed, including the [3H]-methyl-incorporation assay and three Pyrosequencing assays: Alu, LINE-1 and LUMA. RESULTS: In the total sample, increasing quartiles of maternal uAs were associated with an increase in covariate-adjusted means of newborn global DNA methylation as measured by the [3H]-methyl-incorporation assay (quartile 1 (Q1) and Q2 vs. Q4; p = 0.06 and 0.04, respectively). Sex-specific linear regression analyses, while not reaching significance level of 0.05, indicated that the associations between As exposures and Alu, LINE-1 and LUMA were positive among male newborns (N = 58) but negative among female newborns (N = 43); tests for sex differences were borderline significant for the association of cbAs and mbAs with Alu (p = 0.05 and 0.09, respectively) and for the association between maternal uAs and LINE-1 (p = 0.07). Sex-specific correlations between maternal urinary creatinine and newborn methyl-incorporation, Alu and LINE-1 were also evident (p<0.05). CONCLUSIONS: These results suggest that prenatal As exposure is associated with global DNA methylation in cord blood DNA, possibly in a sex-specific manner. Arsenic-induced epigenetic modifications in utero may potentially influence disease outcomes later in life. Additional studies are needed to confirm these findings and to examine the persistence of DNA methylation marks over time.

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Metadata

Authors
Pilsner, J. R., Hall, M. N., Liu, X., Ilievski, V., Slavkovich, V., Levy, D., Factor-Litvak, P., Yunus, M., Rahman, M., Graziano, J. H., & Gamble, M. V.
Venue
PLoS ONE
Publisher
Public Library of Science (PLoS)
Published
2012-05-25
Volume
7
Issue
5
Pages
e37147
ISSN
1932-6203 (ISSN-L)
DOI
10.1371/journal.pone.0037147
OpenAlex
W2067045823
Cited by
160
References
4
FWCI
15.36
Type
journal article
Language
en
Open access
gold

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CoChat. (2026). Citation check: Influence of Prenatal Arsenic Exposure and Newborn Sex on Global Methylation of Cord Blood DNA. https://app.cochat.ai/papers/10.1371/journal.pone.0037147
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Pilsner, J. R., Hall, M. N., Liu, X., Ilievski, V., Slavkovich, V., Levy, D., Factor-Litvak, P., Yunus, M., Rahman, M., Graziano, J. H., & Gamble, M. V. (2012). Influence of Prenatal Arsenic Exposure and Newborn Sex on Global Methylation of Cord Blood DNA. PLoS ONE. https://doi.org/10.1371/journal.pone.0037147

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