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Environ Epidemiol. 2019 Feb;3(1). pii: e039. doi: 10.1097/EE9.0000000000000039.

Associations of prenatal exposure to polybrominated diphenyl ethers and polychlorinated biphenyls with long-term gut microbiome structure: a pilot study.

Author information

1
Department of Environmental Health, Harvard T.H. Chan School of Public Health, Boston, MA, USA.
2
Department of Environmental Health Sciences, Columbia Mailman School of Public Health, New York, NY, USA.
3
Département de Pédiatrie, Université de Sherbrooke, Sherbrooke, Québec, Canada.
4
Department of Biostatistics, Harvard T.H. Chan School of Public Health, Boston, MA, USA.
5
Department of Pediatrics, Perelman School of Medicine at the University of Pennsylvania and Children's Hospital of Philadelphia, Philadelphia, PA, USA.
6
Department of Preventive Medicine, Northwestern University Feinberg School of Medicine, Chicago, IL, USA.
7
Département de Psychiatrie, Faculté de Médicine et Sciences de la Santé, Université de Sherbrooke, Sherbrooke, Québec, Canada.

Abstract

Background:

The gut microbiome is influenced by early-life exposures, but-despite potentially enormous implications for child health-is understudied in environmental epidemiology. This pilot study is one of the first to explore in utero exposures and long-term gut microbiome profiles. We examined the association between exposure to polybrominated diphenyl ethers (PBDEs) and polychlorinated biphenyls (PCBs) during pregnancy and the mid-childhood gut microbiome.

Methods:

We measured levels of PBDE-47, -99, -100, and -153 and PCB-138, -153, and -180 in maternal plasma during early pregnancy (n=18) and at delivery (n=25) in women of European descent who breastfed the child participant of the Gestation and Environment cohort in Sherbrooke, Québec (recruited 2007-2009). Bacteria in the mid-childhood (6-8 years) fecal microbiome were detected with 16S rRNA sequencing. To test for differences at the taxon level, we used the Microbiome Comprehensive Association Mapping algorithm.

Results:

Early pregnancy PCB-153, -180, and the sum of PCBs (Σ3PCB) concentrations were associated with a higher relative abundance of Propionibacteriales and Propionibacteriaceae in mid-childhood. Higher PCB-180 and Σ3PCB were associated with higher relative abundance of Bacillales Family XI. Higher PBDE-99 exposure was associated with a decrease in uncultured bacteria within the Ruminococcaceae NK4A214 group and PBDE-47 was associated with differences in Ruminococcus 2. These taxon-level changes did not result in differences in within- or between-subject diversity. Exposures at delivery were not associated with differences in taxa.

Conclusions:

Prenatal exposure to PCBs and PBDEs is associated with mid-childhood gut microbiome profiles. Larger studies are needed to confirm these results and explore health implications.

PMID:
30778401
PMCID:
PMC6376400
[Available on 2020-02-01]
DOI:
10.1097/EE9.0000000000000039

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