Evidence map›Paper›PMID 23644563›Full record

ArticleEpigenetics2013

Sex-specific effects of early life cadmium exposure on DNA methylation and implications for birth weight.

Maria Kippler, Karin Engström, Simona Jurkovic Mlakar, Matteo Bottai, Sultan Ahmed, Mohammad Bakhtiar Hossain, Rubhana Raqib, Marie Vahter, Karin Broberg

Open access · hybridAbstract read
In one paragraph

Article in Epigenetics, 2013. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 100 papers, 4 of them syntheses that pooled it.

0numbers the graph read from it
0cells of the map it votes in
100citing papers in PubMed, 4 pooled it
13.0field-weighted citation impact, top 1% 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

100 citing papers in PubMed, 4 syntheses or guidelines pooled it, 204 citations in OpenAlex.

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40 more citing papers are in PubMed but not listed here.

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

9 authors at 5 institutions in 4 countries.

Maria KipplerInstitute of Environmental Medicine, Karolinska Institutet, Stockholm, Sweden.
Karin Engström
Simona Jurkovic Mlakar
Matteo Bottai
Sultan Ahmed
Mohammad Bakhtiar Hossain
Rubhana Raqib
Marie Vahter
Karin Broberg
Karolinska Institutet · SELund University · SEInternational Centre for Diarrhoeal Disease Research · BDMRC Biostatistics Unit · GBUniversity of Ljubljana · SI

Funding

No grant is acknowledged in the PubMed record.

6 · The paper itself

Abstract

Dietary cadmium exposure was recently found to alter DNA methylation in adults, but data on effects early in life are lacking. Our objective was to evaluate associations between prenatal cadmium exposure, DNA methylation and birth weight. In total 127 mother-child pairs from rural Bangladesh were studied. For comparison, we included 56 children at 4.5 y. Cadmium concentrations in mothers' blood (gestational week 14) and children's urine were measured by ICPMS. Global DNA methylation was analyzed by Infinium HumanMethylation450K BeadChip in cord blood and children's blood. Maternal cadmium exposure was associated with cord blood DNA methylation (p-value < 10 (-16) ). The association was markedly sex-specific. In boys, 96% of the top 500 CpG sites showed positive correlations (rS-values > 0.50), whereas most associations in girls were inverse; only 29% were positive (rS > 0.45). In girls we found overrepresentation of methylation changes in genes associated with organ development, morphology and mineralization of bone, whereas changes in boys were found in cell death-related genes. Several individual CpG sites that were positively associated with cadmium were inversely correlated with birth weight, although none statistically significant after correction for multiple comparisons. The associations were, however, fairly robust in multivariable-adjusted linear regression models. We identified CpG sites that were significantly associated with cadmium exposure in both newborns and 4.5-y-old children. In conclusion, cadmium exposure in early life appears to alter DNA methylation differently in girls and boys. This is consistent with previous findings of sex-specific cadmium toxicity. Cadmium-related changes in methylation were also related to lower birth weight.

Indexed as

Sex CharacteristicsAdultBangladeshBirth WeightCadmiumChild, PreschoolCpG IslandsDNA MethylationFemaleFetal BloodHumansInfant, NewbornMaleRegression AnalysisCadmium450KCpGepigeneticfetal developmentgendergene-environment interactiongrowth

Identifiers

PMID23644563
PMCPMC3741219
OpenAlexW2071764836

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Registered trials

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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.