Evidence map›Paper›PMID 21406445›Full record

ArticleHuman reproduction (Oxford, England)2011

Expression pattern of endothelin system components and localization of smooth muscle cells in the human pre-ovulatory follicle.

Dong-Hee Choi, Eun Kyung Kim, Kyeoung-Hwa Kim, Kyung-Ah Lee, Dong-Wook Kang, Hey Young Kim, Phillip Bridges, Chemyong Ko

Open access · bronzeAbstract read
In one paragraph

Article in Human reproduction (Oxford, England), 2011. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 23 papers.

0numbers the graph read from it
0cells of the map it votes in
23citing papers in PubMed
5.7field-weighted citation impact, top 4% 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, 45 citations in OpenAlex.

  1. Review
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  6. Review
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  9. Article
  10. Endothelin 2: a key player in ovulation and fertility.Reproduction (Cambridge, England) · 2022
    Review
  11. Article
  12. Article
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  16. 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

8 authors at 3 institutions in 2 countries.

Dong-Hee ChoiDepartment of Obstetrics and Gynaecology, CHA University, Bundang-Si, Kyounggi-do, Republic of Korea.
Eun Kyung Kim
Kyeoung-Hwa Kim
Kyung-Ah Lee
Dong-Wook Kang
Hey Young Kim
Phillip Bridges
Chemyong Ko
CHA University · KRUniversity of Kentucky · USEulji University · KR

Funding

Endothelin-2 in Ovarian Follicle RuptureR01HD052694 · NICHD · UNIVERSITY OF KENTUCKY · PI CURRY, THOMAS E · 2006 to 2010
$1.2M
NICHD NIH HHS R01HD052694
6 · The paper itself

Abstract

backgroundWhether ovarian follicular rupture involves contractile activity or not has been debated for decades. Recently, study in the rodents has indicated that an endogenously produced potent vasoconstrictive peptide, endothelin-2 (EDN2), may induce follicular constriction immediately prior to ovulation. This study was aimed to systematically characterize the human ovarian endothelin system and localize smooth muscle cells to assess the possible involvement of contractile activity in human ovulation.

methodsThis is a prospective experimental study. Study subjects were 20 women aged 20-38 years who underwent IVF owing to tubal or male factors. Expression patterns of messenger RNAs (mRNAs) for EDN1, EDN2, EDN3, endothelin-converting enzyme-1 (ECE1 and ECE2), endothelin receptor A (ET(A)) and ET(B) in the granulosa cells (GCs) and cumulus cells and endothelin peptide concentration in the pre-ovulatory follicles were measured at 36 h after hCG injection. In addition, localization of ovarian smooth muscle cells and endothelin receptor expression were determined in normal (non-IVF patient) ovaries.

resultsPre-ovulatory follicles express mRNA for EDN1 and EDN2, ECE1, ECE2, ET(A) and ET(B), but not EDN3, contain highly concentrated endothelin peptides (105.9 pg/ml) and are surrounded by theca externa that are made mostly of multicell layer non-vascular smooth muscle cells. ET(A) expression is localized in the smooth muscle cells of theca externa, theca interna and GC, whereas ET(B) expression is confined to theca interna.

conclusionsPre-ovulatory follicles contain highly concentrated endothelins and are surrounded by non-vascular smooth muscle cells that express endothelin receptor, suggesting involvement of endothelin-induced contractile action in ovulation in the human ovary.

Indexed as

AdultAspartic Acid EndopeptidasesCumulus CellsEndothelin-Converting EnzymesEndothelinsFemaleFertilization in VitroFollicular FluidGranulosa CellsHumansMetalloendopeptidasesMyocytes, Smooth MuscleOvarian FollicleOvulationReceptors, EndothelinRNA, MessengerAspartic Acid EndopeptidasesECE1 protein, humanECE2 protein, humanEndothelin-Converting EnzymesEndothelinsMetalloendopeptidasesReceptors, EndothelinRNA, Messenger

Identifiers

PMID21406445
PMCPMC3079471
OpenAlexW2114036974

What OpenQuestion holds

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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.