Evidence map›Paper›PMID 24498154›Full record

ArticlePloS one2014

Preeclampsia is associated with alterations in the p53-pathway in villous trophoblast.

Andrew N Sharp, Alexander E P Heazell, Dora Baczyk, Caroline E Dunk, Helen A Lacey, Carolyn J P Jones, Jonathan E Perkins, John C P Kingdom, Philip N Baker, Ian P Crocker

Open access · goldAbstract read
In one paragraph

Article in PloS one, 2014. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 53 papers, 1 of them a synthesis that pooled it.

0numbers the graph read from it
0cells of the map it votes in
53citing papers in PubMed, 1 pooled it
5.6field-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

53 citing papers in PubMed, 1 synthesis or guideline pooled it, 102 citations in OpenAlex.

  1. Pooled it
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  3. Review
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  5. Screening and analysis of plasma differential lncRNA/mRNA in early pregnancy of preeclampsia.Malawi medical journal : the journal of Medical Association of Malawi · 2025
    Article
  6. Blood Pressure and Late Pregnancy Circulating miRNAs in the MADRES Study.Journal of the American Heart Association · 2025
    Article
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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

10 authors at 4 institutions in 3 countries.

Andrew N SharpMaternal & Fetal Health Research Centre, Manchester Academic Health Science Centre, University of Manchester, Manchester, United Kingdom.
Alexander E P HeazellMaternal & Fetal Health Research Centre, Manchester Academic Health Science Centre, University of Manchester, Manchester, United Kingdom.
Dora BaczykSamuel Lunenfeld Research Institute, Mount Sinai Hospital, Toronto, Canada.
Caroline E DunkSamuel Lunenfeld Research Institute, Mount Sinai Hospital, Toronto, Canada.
Helen A LaceyMaternal & Fetal Health Research Centre, Manchester Academic Health Science Centre, University of Manchester, Manchester, United Kingdom.
Carolyn J P JonesSamuel Lunenfeld Research Institute, Mount Sinai Hospital, Toronto, Canada.
Jonathan E PerkinsSamuel Lunenfeld Research Institute, Mount Sinai Hospital, Toronto, Canada.
John C P KingdomSamuel Lunenfeld Research Institute, Mount Sinai Hospital, Toronto, Canada.
Philip N BakerMaternal & Fetal Health Research Centre, Manchester Academic Health Science Centre, University of Manchester, Manchester, United Kingdom ; Liggins Institute, University of Auckland, Auckland, New Zealand.
Ian P CrockerMaternal & Fetal Health Research Centre, Manchester Academic Health Science Centre, University of Manchester, Manchester, United Kingdom.
Lunenfeld-Tanenbaum Research Institute · CAManchester Academic Health Science Centre · GBUniversity of Manchester · GBMount Sinai Hospital · CA

Funding

Wellcome TrustWellcome Trust R107500
6 · The paper itself

Abstract

backgroundPreeclampsia (PE) is characterized by exaggerated apoptosis of the villous trophoblast of placental villi. Since p53 is a critical regulator of apoptosis we hypothesized that excessive apoptosis in PE is mediated by abnormal expression of proteins participating in the p53 pathway and that modulation of the p53 pathway alters trophoblast apoptosis in vitro.

methodsFresh placental villous tissue was collected from normal pregnancies and pregnancies complicated by PE; Western blotting and real-time PCR were performed on tissue lysate for protein and mRNA expression of p53 and downstream effector proteins, p21, Bax and caspases 3 and 8. To further assess the ability of p53 to modulate apoptosis within trophoblast, BeWo cells and placental villous tissue were exposed to the p53-activator, Nutlin-3, alone or in combination with the p53-inhibitor, Pifithrin-α (PFT-α). Equally, Mdm2 was knocked-down with siRNA.

resultsProtein expression of p53, p21 and Bax was significantly increased in pregnancies complicated by PE. Conversely, Mdm2 protein levels were significantly depleted in PE; immunohistochemistry showed these changes to be confined to trophoblast. Reduction in the negative feedback of p53 by Mdm2, using siRNA and Nutlin-3, caused an imbalance between p53 and Mdm2 that triggered apoptosis in term villous explants. In the case of Nutlin, this was attenuated by Pifithrin-α.

conclusionsThese data illustrate the potential for an imbalance in p53 and Mdm2 expression to promote excessive apoptosis in villous trophoblast. The upstream regulation of p53 and Mdm2, with regard to exaggerated apoptosis and autophagy in PE, merits further investigation.

Indexed as

bcl-2-Associated X ProteinCaspase 3Caspase 8Chorionic VilliFemaleHumansPlacentaPre-EclampsiaPregnancyProto-Oncogene Proteins c-bcl-2Proto-Oncogene Proteins c-mdm2TrophoblastsTumor Suppressor Protein p53bcl-2-Associated X ProteinCaspase 3Caspase 8MDM2 protein, humanProto-Oncogene Proteins c-bcl-2Proto-Oncogene Proteins c-mdm2Tumor Suppressor Protein p53

Identifiers

PMID24498154
PMCPMC3907567
OpenAlexW2077465005

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.