Evidence map›Paper›PMID 34464407›Full record

ArticlePloS one2021

Is there an inflammatory stimulus to human term labour?

Natasha Singh, Bronwen Herbert, Garvin Sooranna, Nishel M Shah, Ananya Das, Suren R Sooranna, Mark R Johnson

Open access · goldAbstract read
In one paragraph

Article in PloS one, 2021. 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
1.2field-weighted citation impact, top 21% 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, 9 citations in OpenAlex.

  1. Review
  2. Neutrophils at the Maternal-Fetal Interface: Agents of Protection or Destruction?American journal of reproductive immunology (New York, N.Y. : 1989) · 2025
    Review
  3. Article
  4. Article
  5. Article
  6. Review
  7. Immunology of Pregnancy and Systemic Consequences.Current topics in microbiology and immunology · 2023
    Article
  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

7 authors at 2 institutions in 1 country.

Natasha SinghChelsea and Westminster Hospital, London, United Kingdom.ORCID 0000-0002-5130-9679
Bronwen HerbertDepartment of Metabolism, Digestion and Reproduction, Imperial College London, London, United Kingdom.
Garvin SoorannaDepartment of Metabolism, Digestion and Reproduction, Imperial College London, London, United Kingdom.
Nishel M ShahChelsea and Westminster Hospital, London, United Kingdom.ORCID 0000-0002-5694-9915
Ananya DasDepartment of Metabolism, Digestion and Reproduction, Imperial College London, London, United Kingdom.
Suren R SoorannaChelsea and Westminster Hospital, London, United Kingdom.
Mark R JohnsonChelsea and Westminster Hospital, London, United Kingdom.
Chelsea and Westminster Hospital · GBImperial College London · GB

Funding

No grant is acknowledged in the PubMed record.

6 · The paper itself

Abstract

Inflammation is thought to play a pivotal role in the onset of term and some forms of preterm labour. Although, we recently found that myometrial inflammation is a consequence rather than a cause of term labour, there are several other reproductive tissues, including amnion, choriodecidua parietalis and decidua basalis, where the inflammatory stimulus to labour may occur. To investigate this, we have obtained amnion, choriodecidual parietalis and decidua basalis samples from women at various stages of pregnancy and spontaneous labour. The inflammatory cytokine profile in each tissue was determine by Bio-Plex Pro® cytokine multiplex assays and quantitative RT-PCR. Active motif assay was used to study transcription activation in the choriodecidua parietalis. Quantitative RT-PCR was use to study the pro-labour genes (PGHS-2, PGDH, OTR and CX43) in all of the tissues at the onset of labour and oxytocin (OT) mRNA expression in the choriodecidual parietalis and decidua basalis. Statistical significance was ascribed to a P value <0.05. In the amnion and choriodecidua parietalis, the mRNA levels of various cytokines decreased from preterm no labour to term no labour samples, but the protein levels were unchanged. The choriodecidua parietalis showed increase in the protein levels of IL-1β and IL-6 in the term early labour samples. In the amnion and decidua basalis, the protein levels of several cytokines rose in term established labour. The multiples of the median derived from the 19-plex cytokine assay were greater in term early labour and term established labour samples from the choriodecidua parietalis, but only in term established labour for myometrium. These data suggest that the inflammatory stimulus to labour may begin in the choriodecidua parietalis, but the absence of any change in prolabour factor mRNA levels suggests that the cytokines may act on the myometrium where we observed changes in transcription factor activation and increases in prolabour gene expression in earlier studies.

Indexed as

CX3C Chemokine Receptor 1CytokinesDeciduaFemaleHumansInflammationInterleukin-10Interleukin-6Labor, ObstetricMyometriumPolymerase Chain ReactionPregnancyCX3C Chemokine Receptor 1CX3CR1 protein, humanCytokinesIL10 protein, humanIL6 protein, humanInterleukin-10Interleukin-6

Identifiers

PMID34464407
PMCPMC8407546
OpenAlexW3198558651

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.