Evidence map›Paper›PMID 17956952›Full record

ArticleThe Journal of clinical endocrinology and metabolism2008

Placental productions and expressions of soluble endoglin, soluble fms-like tyrosine kinase receptor-1, and placental growth factor in normal and preeclamptic pregnancies.

Yang Gu, David F Lewis, Yuping Wang

Registry-linked trialOpen access · bronzeAbstract read
In one paragraph

Article in The Journal of clinical endocrinology and metabolism, 2008. The graph could read no effect estimate from its abstract, so it casts no vote on the map. It is linked to trial NCT04855513 (Prevention of Pre-eclampsia Using Metformin), which is not on this map. Cited by 61 papers.

0numbers the graph read from it
0cells of the map it votes in
61citing papers in PubMed
11.4field-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.

NCT04855513 naunknown statusnot on this mapstarted 2022, after this paper: background citation

Prevention of Pre-eclampsia Using Metformin: a Randomized Control Trial

TypeinterventionalSponsorHamad Medical CorporationRan2022 to 2023Enrolled414ConditionsPreeclampsia, Preeclampsia Severe, High Risk Pregnancy, EclampsiaArmsMetformin
3 · Its place in the literature

Who cites it

61 citing papers in PubMed, 432 citations in OpenAlex.

  1. Article
  2. Article
  3. NFĸB and its inhibitors in preeclampsia: mechanisms and potential interventions.Naunyn-Schmiedeberg's archives of pharmacology · 2025
    Review
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  5. Article
  6. Article
  7. Article
  8. Review
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  11. Article
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  15. Article
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  17. Observational
  18. Article
  19. Review
  20. Review

1 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

3 authors at 1 institution in 1 country.

Yang GuDepartment of Obstetrics and Gynecology, Louisiana State University Health Sciences Center-Shreveport, PO Box 33932, Shreveport, Louisiana 71130, USA.
David F Lewis
Yuping Wang
Louisiana State University Health Sciences Center Shreveport · US

Funding

ENDOTHELIAL BARRIER FUNCTION IN PREECLAMPSIAR01HL065997 · NHLBI · LOUISIANA STATE UNIV HSC SHREVEPORT · PI WANG, YUPING · 2001 to 2010
$1.8M
PLACENTAL FUNCTION IN PREECLAMPSIAR01HD036822 · NICHD · LOUISIANA STATE UNIV HSC SHREVEPORT · PI WANG, YUPING · 1999 to 2009
$1.3M
NHLBI NIH HHS HL65997NHLBI NIH HHS R01 HL065997NICHD NIH HHS HD36822NICHD NIH HHS R01 HD036822
6 · The paper itself

Abstract

contextIncreased production of antiangiogenic factors soluble endoglin (sEng) and soluble fms-like tyrosine kinase receptor-1 (sFlt-1) by the placenta contributes to the pathophysiology in preeclampsia (PE).

objectiveOur objective was to determine the differences in endoglin (Eng), fms-like tyrosine kinase receptor-1 (Flt-1), and placental growth factor (PlGF) expressions between normal and PE placentas and sEng, sFlt-1, and PlGF production by trophoblast cells (TC) cultured under lowered oxygen conditions.

methodsTCs isolated from normal and PE placentas were cultured under regular (5% CO2/air) and lowered (2% O2/5% CO2/93% N2) oxygen conditions. sEng, sFlt-1, and PlGF productions were determined by ELISA. Protein expressions for Eng, Flt-1, and PlGF in the placental tissues were accessed by immunohistochemical staining and Western blot analysis. Deglycosylated Eng, Flt-1, and PlGF protein expressions in placental tissues were also examined.

resultsPE TCs produced significantly more sEng, sFlt-1, and PlGF compared with those from normal TCs (P < 0.05). Under lowered oxygen conditions, PE TCs, but not normal TCs, released more sEng and sFlt-1. In contrast, both normal and PE TCs released less PlGF (P < 0.05). Enhanced expressions of Eng and Flt-1, as well as glycosylated Eng and Flt-1, were observed in PE placentas. Immunoblot also revealed that TCs released glycosylated sFlt-1, but not sEng, in culture.

conclusionsPE TCs produce more sEng, sFlt-1, and PlGF than normal TCs. Lowered oxygen conditions promote sEng and sFlt-1, but reduce PlGF, productions by PE TCs. More glycosylated sEng and sFlt-1 are present in PE placentas. Trophoblasts release glycosylated sFlt-1, but unglycosylated sEng, in culture.

Indexed as

Antigens, CDBlotting, WesternEndoglinEnzyme-Linked Immunosorbent AssayFemaleGlycosylationHumansImmunohistochemistryPlacentaPlacenta Growth FactorPre-EclampsiaPregnancyPregnancy ProteinsReceptors, Cell SurfaceTrophoblastsVascular Endothelial Growth Factor Receptor-1Antigens, CDEndoglinENG protein, humanFLT1 protein, humanPGF protein, humanPlacenta Growth FactorPregnancy ProteinsReceptors, Cell SurfaceVascular Endothelial Growth Factor Receptor-1

Identifiers

PMID17956952
PMCPMC2190747
OpenAlexW2057531505

What OpenQuestion holds

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Registered trials

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.