Evidence map›Paper›PMID 32784053›Full record

ArticlePlacenta2020

Dysregulation of hypoxia-inducible factor-1α (Hif1α) expression in the Hmox1-deficient placenta.

Hui Zhao, Purnima Narasimhan, Flora Kalish, Ronald J Wong, David K Stevenson

Open access · hybridAbstract read
In one paragraph

Article in Placenta, 2020. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 8 papers.

0numbers the graph read from it
0cells of the map it votes in
8citing papers in PubMed
0.8field-weighted citation impact, top 22% 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

8 citing papers in PubMed, 11 citations in OpenAlex.

  1. Article
  2. Trophoblast adaptation to hypoxia: balance and dysfunction.Cell communication and signaling : CCS · 2025
    Review
  3. Review
  4. Article
  5. Article
  6. Article
  7. The Impact of Hypoxia in Early Pregnancy on Placental Cells.International journal of molecular sciences · 2021
    Review
  8. 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 1 institution in 1 country.

Hui ZhaoDepartment of Pediatrics, Stanford University School of Medicine, Stanford, CA, 94305, USA. Electronic address: huizhao2@stanford.edu.
Purnima NarasimhanDepartment of Obstetrics and Gynecology, Stanford University School of Medicine, Stanford, CA, 94305, USA.
Flora KalishDepartment of Pediatrics, Stanford University School of Medicine, Stanford, CA, 94305, USA.
Ronald J WongDepartment of Pediatrics, Stanford University School of Medicine, Stanford, CA, 94305, USA.
David K StevensonDepartment of Pediatrics, Stanford University School of Medicine, Stanford, CA, 94305, USA.
Stanford University · US

Funding

No grant is acknowledged in the PubMed record.

6 · The paper itself

Abstract

introductionSevere hypoxia exists in placentas during early pregnancy, with reoxygenation during mid-gestation. Hypoxia-inducible factor-1α (Hif1α), an oxygen sensor, initiates placental vascular development. We have shown that the placental vasculature in Hmox1-deficient (Hmox1 MATERIALS AND

methodsWhole wild-type (WT) and Het mouse placentas were collected at E8.5 (1%-3% O

resultsHif1α was expressed in WT and Het placentas throughout gestation, with protein levels peaking at E8.5 and mRNA levels significantly upregulated from E9.5-E13.5, but significantly lower in Het placentas. Genes associated with angiogenesis (Vegfa, Vegfr1, Mmp2, Cxcl12, Angpt1, Nos3), antioxidants (Sod1, Gpx1), and transcription factors (Ap2, Bach1, Nrf2) were significantly different in Het placentas. In response to in vitro hypoxia-reoxygenation and to WT or Het placental lysates, Hif1α transcription was lower in Het and Hmox1 KO BMDMs compared with WT BMDMs. DISCUSSION: These findings suggest that deficiencies in Hmox1 underlie the insufficient placental Hif1α response to hypoxia-reoxygenation during gestation and subsequently impair downstream placental vascular formation. Therefore, a dysregulation of Hif1α expression caused by any genetic defect or environmental influence in early pregnancy could be the root cause of pregnancy disorders.

Indexed as

Gene Expression RegulationAnimalsFemaleGestational AgeHeme Oxygenase-1HypoxiaHypoxia-Inducible Factor 1, alpha SubunitMembrane ProteinsMiceMice, KnockoutNeovascularization, PhysiologicPlacentaPregnancyUp-RegulationVascular RemodelingHeme Oxygenase-1Hif1a protein, mouseHmox1 protein, mouseHypoxia-Inducible Factor 1, alpha SubunitMembrane ProteinsAdverse pregnancy outcomesAngiogenesisAntioxidantHypoxiaSpiral artery remodeling

Identifiers

PMID32784053
PMCPMC7549641
OpenAlexW3043831102

What OpenQuestion holds

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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.