Evidence map›Paper›PMID 27884139›Full record

ArticleEnvironmental health : a global access science source2016

Brominated flame retardants in placental tissues: associations with infant sex and thyroid hormone endpoints.

Christopher Leonetti, Craig M Butt, Kate Hoffman, Stephanie C Hammel, Marie Lynn Miranda, Heather M Stapleton

Open access · goldAbstract read
In one paragraph

Article in Environmental health : a global access science source, 2016. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 51 papers, 1 of them a synthesis that pooled it.

0numbers the graph read from it
0cells of the map it votes in
51citing papers in PubMed, 1 pooled it
8.8field-weighted citation impact, top 2% 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

51 citing papers in PubMed, 1 synthesis or guideline pooled it, 123 citations in OpenAlex.

  1. Pooled it
  2. Intervention Strategies usingEndocrine, metabolic & immune disorders drug targets · 2026
    Review
  3. Article
  4. Article
  5. Observational
  6. Article
  7. Article
  8. Article
  9. Article
  10. Review
  11. Review
  12. Article
  13. Article
  14. Review
  15. Article
  16. Article
  17. Article
  18. Article
  19. Article
  20. Article
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

6 authors at 2 institutions in 1 country.

Christopher LeonettiNicholas School of the Environment, Duke University, 9 Circuit Drive, Box 90328, Durham, NC, 27708, USA.
Craig M ButtNicholas School of the Environment, Duke University, 9 Circuit Drive, Box 90328, Durham, NC, 27708, USA.
Kate HoffmanNicholas School of the Environment, Duke University, 9 Circuit Drive, Box 90328, Durham, NC, 27708, USA.
Stephanie C HammelNicholas School of the Environment, Duke University, 9 Circuit Drive, Box 90328, Durham, NC, 27708, USA.
Marie Lynn MirandaDepartment of Statistics, Rice University, Houston, TX, USA.
Heather M StapletonNicholas School of the Environment, Duke University, 9 Circuit Drive, Box 90328, Durham, NC, 27708, USA. heather.stapleton@duke.edu.
Duke University · USRice University · US

Funding

Children's Exposure to Flame Retardants: Effects on Thyroid Hormone RegulationR01ES016099 · NIEHS · DUKE UNIVERSITY · PI STAPLETON, HEATHER M · 2008 to 2017
$5.0M
Deiodinase Activity as a Biomarker of Response to Brominated Flame RetardantsR01ES020430 · NIEHS · DUKE UNIVERSITY · PI STAPLETON, HEATHER M · 2011 to 2012
$733k
NIEHS NIH HHS R01 ES016099NIEHS NIH HHS R01 ES020430
6 · The paper itself

Abstract

backgroundBrominated flame retardants (BFRs) are endocrine disruptors that bioaccumulate in the placenta, but it remains unclear if they disrupt tissue thyroid hormone (TH) metabolism. Our primary goal was to investigate associations between placental BFRs, TH levels, Type 3 deiodinase (DIO3) activity and TH sulfotransferase (SULT) activities.

methodsPlacenta samples collected from 95 women who delivered term (>37 weeks) infants in Durham, NC, USA (enrolled 2010-2011) were analyzed for polybrominated diphenyl ethers (PBDEs), 2,4,6-tribromophenol (2,4,6-TBP), THs (T4, T3 and rT3), and DIO3 and TH SULT activities.

resultsPBDEs and 2,4,6-TBP were detected in all placenta samples. PBDEs were higher in placental tissues from male infants compared to female infants, with 2,4,6-TBP and BDE-209 levels approximately twice as high. Among male infants, placental BDE-99 and BDE-209 were negatively associated with rT3 placental levels. For female infants, placental BDE-99 and 2,4,6-TBP were positively associated with T3 concentrations. DIO3 activity was also significantly higher in placental tissues from male infants compared to females, while 3,3'-T2 SULT activity was significantly higher in placental tissues from females compared to males. Among males, several PBDE congeners were positively correlated with T3 SULT, while BDE-99 was negatively associated with T3 SULT among females. Associations generally remained after adjustment for potential confounding by maternal age and gestational age at delivery.

conclusionsThese results suggest BFRs accumulate in the placenta and potentially alter TH function in a sex-specific manner, a possible mechanism to explain the sex-dependent impacts of environmental exposure on children's growth and development. More research is needed to elucidate the effects of BFRs on placenta function during pregnancy, as well as the biological consequences of exposure and thyroid disruption.

Indexed as

AdultEndocrine DisruptorsFemaleFlame RetardantsHalogenated Diphenyl EthersHumansInfant, NewbornIodide PeroxidaseMalePhenolsPlacentaPregnancySulfotransferasesThyroxineTriiodothyronine2,4,6-tribromophenolEndocrine DisruptorsFlame RetardantsHalogenated Diphenyl EthersIodide Peroxidaseiodothyronine deiodinase type IIIPhenolsSulfotransferasesThyroxineTriiodothyronine2,4,6-tribromophenol (2,4,6-TBP)PlacentaPolybrominated diphenyl ether (PBDE)Thyroid hormone

Identifiers

PMID27884139
PMCPMC5123327
OpenAlexW2556793828

What OpenQuestion holds

Textmetadata
LicenceCC BY
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.