Evidence map›Paper›PMID 27251092›Full record

ArticleBiology of reproduction2016

Matrix Metalloproteinase Expression in the Rat Myometrium During Pregnancy, Term Labor, and Postpartum.

Tina Tu-Thu Ngoc Nguyen, Oksana Shynlova, Stephen J Lye

Open access · bronzeAbstract read
In one paragraph

Article in Biology of reproduction, 2016. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 18 papers.

0numbers the graph read from it
0cells of the map it votes in
18citing papers in PubMed
2.9field-weighted citation impact, top 9% 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

18 citing papers in PubMed, 29 citations in OpenAlex.

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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

3 authors at 1 institution in 1 country.

Tina Tu-Thu Ngoc NguyenLunenfeld-Tanenbaum Research Institute, Mount Sinai Hospital, Toronto, Canada Department of Physiology, University of Toronto, Canada.
Oksana ShynlovaLunenfeld-Tanenbaum Research Institute, Mount Sinai Hospital, Toronto, Canada Department of Obstetrics and Gynecology, University of Toronto, Canada shynlova@lunenfeld.ca.
Stephen J LyeLunenfeld-Tanenbaum Research Institute, Mount Sinai Hospital, Toronto, Canada Department of Physiology, University of Toronto, Canada Department of Obstetrics and Gynecology, University of Toronto, Canada.
Lunenfeld-Tanenbaum Research Institute · CA

Funding

CIHR FDN-143262CIHR MOP-37775
6 · The paper itself

Abstract

Pregnancy, spontaneous term labor (TL), and postpartum (PP) involution are associated with changes in the cellular and extracellular matrix composition of the uterus. Both the uterine smooth muscle (myometrium) and the infiltrating peripheral blood leukocytes involved in the activation of labor secrete extracellular matrix-degrading enzymes (matrix metalloproteinases, MMPs) that can modulate cellular behavior and barrier function. MMP expression is induced by mechanical stretch in several tissues. We hypothesized that the expression and activity of myometrial MMPs and their tissue inhibitors (TIMPs) are modulated in preparation for TL and PP involution and are regulated by mechanical stretch of uterine walls imposed by the growing fetus. Myometrial tissues were collected from bilaterally and unilaterally pregnant rats across gestation, TL, and PP. Total RNA and proteins were subjected to real-time PCR and immunoblotting, respectively, and tissue localization and activity was examined by immunohistochemistry and in situ zymography. We found that Mmp7, Mmp11, and Mmp12 mRNA levels were upregulated during TL and PP, while Mmp2, Mmp3, Mmp8, Mmp9, Mmp10, and Mmp13 mRNAs were only upregulated during PP. Timp1-Timp4 were stably expressed throughout gestation with some fluctuations PP. Active MMP2 was induced in the empty uterine horn during gestation and in the gravid PP uterus, suggesting negative regulation by biological mechanical stretch. We conclude that specific subsets of uterine MMPs are differentially regulated in the rat myometrium in preparation for two major events: TL and PP uterine involution.

Indexed as

AnimalsFemaleGene ExpressionMatrix MetalloproteinasesMuscle, SmoothMyometriumParturitionPostpartum PeriodPregnancyRatsRats, WistarMatrix Metalloproteinasesextracellular matrixgene expressionmyometriumparturitionpregnancy

Identifiers

PMID27251092
PMCPMC5029434
OpenAlexW2418776214

What OpenQuestion holds

Textmetadata
LicenceCC BY-NC
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.