Evidence map›Paper›PMID 20598165›Full record

ArticleEnvironmental health : a global access science source2010

Placental transfer of the polybrominated diphenyl ethers BDE-47, BDE-99 and BDE-209 in a human placenta perfusion system: an experimental study.

Marie Frederiksen, Katrin Vorkamp, Line Mathiesen, Tina Mose, Lisbeth E Knudsen

Open access · goldAbstract read
In one paragraph

Article in Environmental health : a global access science source, 2010. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 30 papers, 2 of them syntheses that pooled it.

0numbers the graph read from it
0cells of the map it votes in
30citing papers in PubMed, 2 pooled it
5.0field-weighted citation impact, top 5% 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

30 citing papers in PubMed, 2 syntheses or guidelines pooled it, 90 citations in OpenAlex.

  1. Pooled it
  2. Pooled it
  3. Article
  4. Models of Endocrine-Disrupting Effects: Human Placental Steroidogenesis.Basic & clinical pharmacology & toxicology · 2025
    Review
  5. Article
  6. Article
  7. Review
  8. Article
  9. Polybrominated diphenyl ethers in the environmental systems: a review.Journal of environmental health science & engineering · 2021
    Review
  10. Article
  11. Placenta Disrupted: Endocrine Disrupting Chemicals and Pregnancy.Trends in endocrinology and metabolism: TEM · 2020
    Review
  12. Article
  13. Article
  14. Article
  15. Article
  16. Article
  17. Review
  18. Article
  19. Article
  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

5 authors at 2 institutions in 1 country.

Marie FrederiksenDepartment of Environment & Health, Institute of Public Health, University of Copenhagen, Oester Farimagsgade 5, DK-1014 Copenhagen K, Denmark.
Katrin Vorkamp
Line Mathiesen
Tina Mose
Lisbeth E Knudsen
University of Copenhagen · DKAarhus University · DK

Funding

No grant is acknowledged in the PubMed record.

6 · The paper itself

Abstract

backgroundPolybrominated diphenyl ethers (PBDEs) have been widely used as flame retardants in consumer products. PBDEs may affect thyroid hormone homeostasis, which can result in irreversible damage of cognitive performance, motor skills and altered behaviour. Thus, in utero exposure is of very high concern due to critical windows in fetal development.

methodsA human ex vivo placenta perfusion system was used to study the kinetics and extent of the placental transfer of BDE-47, BDE-99 and BDE-209 during four-hour perfusions. The PBDEs were added to the maternal circulation and monitored in the maternal and fetal compartments. In addition, the perfused cotyledon, the surrounding placental tissue as well as pre-perfusion placental tissue and umbilical cord plasma were also analysed. The PBDE analysis included Soxhlet extraction, clean-up by adsorption chromatography and GC-MS analysis. RESULTS AND DISCUSSION: Placental transfer of BDE-47 was faster and more extensive than for BDE-99. The fetal-maternal ratios (FM-ratio) after four hours of perfusion were 0.47 and 0.25 for BDE-47 and BDE-99, respectively, while the indicative permeability coefficient (IPC) measured after 60 minutes of perfusion was 0.26 h-1 and 0.10 h-1, respectively. The transport of BDE-209 seemed to be limited. These differences between the congeners may be related to the degree of bromination. Significant accumulation was observed for all congeners in the perfused cotyledon as well as in the surrounding placental tissue.

conclusionThe transport of BDE-47 and BDE-99 indicates in utero exposure to these congeners. Although the transport of BDE-209 was limited, however, possible metabolic debromination may lead to products which are both more toxic and transportable. Our study demonstrates fetal exposure to PBDEs, which should be included in risk assessment of PBDE exposure of women of child-bearing age.

Indexed as

AntipyrineFemaleHalogenated Diphenyl EthersHumansMaternal-Fetal ExchangePerfusionPlacentaPolybrominated BiphenylsPregnancy2,2',4,4',5-brominated diphenyl ether2,2',4,4'-tetrabromodiphenyl etherAntipyrinedecabromobiphenyl etherHalogenated Diphenyl EthersPolybrominated Biphenyls

Identifiers

PMID20598165
PMCPMC2908602
OpenAlexW2152497928

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.