Evidence map›Paper›PMID 24375655›Full record

ArticleEnvironmental and molecular mutagenesis2014

Effects of age, sex, and persistent organic pollutants on DNA methylation in children.

Karen Huen, Paul Yousefi, Asa Bradman, Liying Yan, Kim G Harley, Katherine Kogut, Brenda Eskenazi, Nina Holland

Open access · greenAbstract read
In one paragraph

Article in Environmental and molecular mutagenesis, 2014. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 46 papers, 2 of them syntheses that pooled it.

0numbers the graph read from it
0cells of the map it votes in
46citing papers in PubMed, 2 pooled it
4.8field-weighted citation impact, top 4% of its field
1 · What the graph read from it

What it found

Each row is one number read from the abstract, on the scale the paper reported it, with its interval. Left of the dashed line favours the treatment, right favours the comparator. Under each row is the sentence it came from. New to these charts? A ten-minute tutorial.

The abstract states no effect estimate the extractor could read, or names no intervention and outcome on the map, so this paper lights no cell and moves no belief. It is still indexed, cited and linked below.

2 · The registry

The trial behind it

Trials whose registry record cites this paper, or whose number appears in the abstract. A trial that started after this paper was published is citing it as background, not reporting it.

Neither the registry nor the abstract names a trial number. If this is a trial report, that itself is worth knowing.

3 · Its place in the literature

Who cites it

46 citing papers in PubMed, 2 syntheses or guidelines pooled it, 95 citations in OpenAlex.

  1. Pooled it
  2. Pooled it
  3. Mapping assays to the key characteristics of carcinogens to support decision-making.Database : the journal of biological databases and curation · 2025
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  10. Polybrominated diphenyl ethers in the environment: a wake-up call for concerted action in India.Environmental science and pollution research international · 2021
    Review
  11. Article
  12. Article
  13. Review
  14. Article
  15. New Insights into Mechanisms of Endocrine-Disrupting Chemicals in Thyroid Diseases: The Epigenetic Way.International journal of environmental research and public health · 2020
    Review
  16. Article
  17. Article
  18. Epigenetic Effects of Polybrominated Diphenyl Ethers on Human Health.International journal of environmental research and public health · 2019
    Review
  19. Review
  20. Review
4 · The record

Corrections and comments

PubMed lists nothing against this paper. Absence here is not a guarantee, only a check that was made.

5 · Who and what money

Authors and funding

8 authors at 1 institution in 1 country.

Karen HuenCenter for Children's Environmental Health, School of Public Health, University of California, Berkeley, California.
Paul Yousefi
Asa Bradman
Liying Yan
Kim G Harley
Katherine Kogut
Brenda Eskenazi
Nina Holland
University of California, Berkeley · US

Funding

Project C: Epigenetic Effects of DDT/E and PBDEs on PubertyP01ES009605 · NIEHS · UNIVERSITY OF CALIFORNIA BERKELEY · PI ESKENAZI, BRENDA · 1999 to 2015
$11.2M
PBDEs, DDT and Neurodevelopment in School-Aged Mexican-American ChildrenR01ES015572 · NIEHS · UNIVERSITY OF CALIFORNIA BERKELEY · PI ESKENAZI, BRENDA · 2007 to 2010
$2.0M
Endocrine Disruptors and Neurodevelopmental OutcomesR01OH007400 · OH · UNIVERSITY OF CALIFORNIA BERKELEY · PI ESKENAZI, BRENDA · 2001 to 2004
–
NIEHS NIH HHS P01 ES009605NIEHS NIH HHS R01 ES015572NIOSH CDC HHS R01 OH007400
6 · The paper itself

Abstract

Epigenetic changes such as DNA methylation may be a molecular mechanism through which environmental exposures affect health. Methylation of Alu and long interspersed nucleotide elements (LINE-1) is a well-established measure of DNA methylation often used in epidemiologic studies. Yet, few studies have examined the effects of host factors on LINE-1 and Alu methylation in children. We characterized the relationship of age, sex, and prenatal exposure to persistent organic pollutants (POPs), dichlorodiphenyl trichloroethane (DDT), dichlorodiphenyldichloroethylene (DDE), and polybrominated diphenyl ethers (PBDEs), with DNA methylation in a birth cohort of Mexican-American children participating in the CHAMACOS study. We measured Alu and LINE-1 methylation by pyrosequencing bisulfite-treated DNA isolated from whole blood samples collected from newborns and nine-year old children (n = 358). POPs were measured in maternal serum during late pregnancy. Levels of DNA methylation were lower in nine-year olds compared to newborns and were higher in boys compared to girls. Higher prenatal DDT/E exposure was associated with lower Alu methylation at birth, particularly after adjusting for cell type composition (P = 0.02 for o,p' -DDT). Associations of POPs with LINE-1 methylation were only identified after examining the co-exposure of DDT/E with PBDEs simultaneously. Our data suggest that repeat element methylation can be an informative marker of epigenetic differences by age and sex and that prenatal exposure to POPs may be linked to hypomethylation in fetal blood. Accounting for co-exposure to different types of chemicals and adjusting for blood cell types may increase sensitivity of epigenetic analyses for epidemiological studies.

Indexed as

DNA MethylationAge FactorsAlu ElementsCell CountChildCohort StudiesDDTDichlorodiphenyl DichloroethyleneEnvironmental PollutantsEpigenesis, GeneticFemaleFetal BloodHalogenated Diphenyl EthersHumansInfant, NewbornLong Interspersed Nucleotide ElementsDDTDichlorodiphenyl DichloroethyleneEnvironmental PollutantsHalogenated Diphenyl EthersOrganic Chemicalspentabromodiphenyl etherAluco-exposureDDEDDTepigeneticsLINE-1PBDE

Identifiers

PMID24375655
PMCPMC4410811
OpenAlexW1853227327

What OpenQuestion holds

Textmetadata
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Read underepoch 390

Registered trials

None linked

Read under generation 80e0d062 · epoch 390. Bibliography from PubMed, PubMed Central and OpenAlex; grants from NIH RePORTER; trial links from ClinicalTrials.gov; estimates, votes and beliefs from the OpenQuestion graph.