Evidence map›Paper›PMID 34100896›Full record

ArticleBiology open2021

RNA-Seq reveals changes in human placental metabolism, transport and endocrinology across the first-second trimester transition.

Malwina Prater, Russell S Hamilton, Hong Wa Yung, Andrew M Sharkey, Paul Robson, N Erlyani Abd Hamid, Eric Jauniaux, D Stephen Charnock-Jones, Graham J Burton, Tereza Cindrova-Davies

Open access · goldAbstract read
In one paragraph

Article in Biology open, 2021. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 23 papers, 1 of them a synthesis that pooled it.

0numbers the graph read from it
0cells of the map it votes in
23citing papers in PubMed, 1 pooled it
4.2field-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

23 citing papers in PubMed, 1 synthesis or guideline pooled it, 42 citations in OpenAlex.

  1. Pooled it
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  11. Placenta accreta spectrum.Nature reviews. Disease primers · 2025
    Review
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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.

Malwina PraterCentre for Trophoblast Research, Department of Physiology, Development and Neuroscience, University of Cambridge, Downing Street, Cambridge, CB2 3EG, UK.
Russell S HamiltonCentre for Trophoblast Research, Department of Physiology, Development and Neuroscience, University of Cambridge, Downing Street, Cambridge, CB2 3EG, UK.ORCID 0000-0002-0598-3793
Hong Wa YungCentre for Trophoblast Research, Department of Physiology, Development and Neuroscience, University of Cambridge, Downing Street, Cambridge, CB2 3EG, UK.
Andrew M SharkeyCentre for Trophoblast Research, Department of Physiology, Development and Neuroscience, University of Cambridge, Downing Street, Cambridge, CB2 3EG, UK.
Paul RobsonThe Jackson Laboratory, The JAX Center for Genetics of Fertility and Reproduction, 10 Discovery Drive, Farmington, CT 06032, USA.ORCID 0000-0002-0191-3958
N Erlyani Abd HamidGenome Institute of Singapore, Singapore 138672, Singapore.
Eric JauniauxDepartment of Obstetrics and Gynaecology, EGA Institute for Women's Health, Faculty of Population Health Sciences, University College London, London, WC1E 6BT, UK.
D Stephen Charnock-JonesCentre for Trophoblast Research, Department of Physiology, Development and Neuroscience, University of Cambridge, Downing Street, Cambridge, CB2 3EG, UK.ORCID 0000-0002-2936-4890
Graham J BurtonCentre for Trophoblast Research, Department of Physiology, Development and Neuroscience, University of Cambridge, Downing Street, Cambridge, CB2 3EG, UK.
Tereza Cindrova-DaviesCentre for Trophoblast Research, Department of Physiology, Development and Neuroscience, University of Cambridge, Downing Street, Cambridge, CB2 3EG, UK.ORCID 0000-0002-9212-0514
University of Cambridge · GBGenome Institute of Singapore · SGJackson Laboratory · USUniversity College London · GB

Funding

Medical Research Council G9701485Medical Research Council MR/L020041/1Medical Research Council MR/P001092/1
6 · The paper itself

Abstract

The human placenta is exposed to major environmental changes towards the end of the first trimester associated with full onset of the maternal arterial placental circulation. Changes include a switch from histotrophic to hemotrophic nutrition, and a threefold rise in the intraplacental oxygen concentration. We evaluated their impact on trophoblast development and function using RNA-sequencing (RNA-Seq) and DNA-methylation analyses performed on the same chorionic villous samples at 7-8 (n=8) and 13-14 (n=6) weeks of gestation. Reads were adjusted for fetal sex. Most DEGs were associated with protein processing in the endoplasmic reticulum (ER), hormone secretion, transport, extracellular matrix, vasculogenesis, and reactive oxygen species metabolism. Transcripts higher in the first trimester were associated with synthesis and ER processing of peptide hormones, and glycolytic pathways. Transcripts encoding proteins mediating transport of oxygen, lipids, protein, glucose, and ions were significantly increased in the second trimester. The motifs of CBX3 and BCL6 were significantly overrepresented, indicating the involvement of these transcription factor networks in the regulation of trophoblast migration, proliferation and fusion. These findings are consistent with a high level of cell proliferation and hormone secretion by the early placenta to secure implantation in a physiological low-oxygen environment.

Indexed as

BiomarkersEnergy MetabolismGene Expression RegulationComputational BiologyFemaleGene Expression ProfilingGene OntologyHumansImmunohistochemistryMolecular Sequence AnnotationPlacentaPregnancyPregnancy Trimester, FirstPregnancy Trimester, SecondRNA-SeqBiomarkersEarly placentaHuman pregnancyMetabolismMethylationTranscriptome

Identifiers

PMID34100896
PMCPMC8214423
OpenAlexW3168521457

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.