Evidence map›Paper›PMID 18936075›Full record

ArticleThe Journal of physiology2008

Relationship between gene expression and function of uterotonic systems in the rat during gestation, uterine activation and both term and preterm labour.

Patrice Arthur, Michael J Taggart, Barbara Zielnik, Susan Wong, Bryan F Mitchell

Open access · greenAbstract read
In one paragraph

Article in The Journal of physiology, 2008. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 27 papers, 1 of them a synthesis that pooled it.

0numbers the graph read from it
0cells of the map it votes in
27citing papers in PubMed, 1 pooled it
3.6field-weighted citation impact, top 8% 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

27 citing papers in PubMed, 1 synthesis or guideline pooled it, 62 citations in OpenAlex.

  1. Nitric oxide donors for treating preterm labour.The Cochrane database of systematic reviews · 2014
    Pooled it
  2. Review
  3. Article
  4. A journey from speech to dance through the field of oxytocin.Comprehensive psychoneuroendocrinology · 2023
    Review
  5. Article
  6. Inflammatory Amplification: A Central Tenet of Uterine Transition for Labor.Frontiers in cellular and infection microbiology · 2021
    Review
  7. Review
  8. Article
  9. Article
  10. Article
  11. Article
  12. Article
  13. Article
  14. Matrix Metalloproteinases in Normal Pregnancy and Preeclampsia.Progress in molecular biology and translational science · 2017
    Review
  15. Article
  16. Article
  17. Article
  18. Article
  19. Article
  20. 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 4 institutions in 2 countries.

Patrice ArthurPerinatal Research Centre, Department of Obstetrics and Gynaecology, 220 Heritage Medical Research Centre, University of Alberta, Edmonton, Alberta, Canada T6G 2S2.
Michael J Taggart
Barbara Zielnik
Susan Wong
Bryan F Mitchell
Perinatal Institute · GBNewcastle University · GBUniversity of Alberta · CAUniversity of Manchester · GB

Funding

No grant is acknowledged in the PubMed record.

6 · The paper itself

Abstract

We have documented gestation- and labour- (preterm and term) dependent changes in expression of genes encoding contraction associated proteins in the rat uterus and correlated these changes with various parameters of uterine contractility. The data demonstrate increased expression of contractile agonist systems concurrent with decreased expression of relaxant systems after gestational day 20. Significant increases in expression of oxytocin (OT), its receptor (OTR), prostaglandin (PG) H synthase isoform 1 (PGHS-1) and PGF(2alpha) receptor (FP) occurred first, followed by increases in PGHS-2, connexin-43, endothelin-1 (ET-1) and the ET-1 receptor isoform ET(A). Expression of OTR and FP was significantly reduced during mid-gestation compared to non-pregnant animals. Expression of inducible nitric oxide synthase (iNOS) increased significantly during pregnancy then decreased concurrently with the increase in OTR and FP. Functional changes in uterine contractility accompany changes in gene expression. OT was the most potent contractile stimulant. Sensitivity of uterine strips to OT was reduced in early and mid-pregnancy then increased at uterine activation. Progesterone antagonist-induced preterm labour caused changes similar to those at normal term. Comparison of mRNA transcripts in separated endometrium and myometrium suggested that the endometrium is an important regulator of myometrial contractility, analogous to the relationship between endothelium and vascular smooth muscle. This novel combination of functional and genetic expression analyses provides new insight into the physiology of parturition.

Indexed as

Gene Expression ProfilingAnimalsConnexin 43Cyclooxygenase 1Cyclooxygenase 2DinoprostEndothelin-1FemaleGene ExpressionGestational AgeMaleMifepristoneMyographyNitric Oxide Synthase Type IIOxytocinPregnancyConnexin 43Cyclooxygenase 1Cyclooxygenase 2DinoprostEndothelin-1MifepristoneNitric Oxide Synthase Type IINos2 protein, ratOxytocinReceptors, EndothelinReceptors, Oxytocin

Identifiers

PMID18936075
PMCPMC2655414
OpenAlexW1512437302

What OpenQuestion holds

Textmetadata
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.