Evidence map›Paper›PMID 24650175›Full record

ArticleMolecular endocrinology (Baltimore, Md.)2014

Targeted disruption of Nrg1 in granulosa cells alters the temporal progression of oocyte maturation.

Ikko Kawashima, Takashi Umehara, Noritaka Noma, Tomoko Kawai, Manami Shitanaka, Joanne S Richards, Masayuki Shimada

Open access · bronzeAbstract read
In one paragraph

Article in Molecular endocrinology (Baltimore, Md.), 2014. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 22 papers.

0numbers the graph read from it
0cells of the map it votes in
22citing papers in PubMed
3.2field-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

22 citing papers in PubMed, 34 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

7 authors at 2 institutions in 2 countries.

Ikko KawashimaLaboratory of Reproductive Endocrinology (I.K., T.U., N.N., T.K., M.S., M.S.), Graduate School of Biosphere Science, Hiroshima University, Higashi-Hiroshima,739-8528, Japan; and Department of Molecular and Cellular Biology (J.S.R.), Baylor College of Medicine, Houston, Texas 77030.
Takashi Umehara
Noritaka Noma
Tomoko Kawai
Manami Shitanaka
Joanne S Richards
Masayuki Shimada
Hiroshima University · JPBaylor College of Medicine · US

Funding

TRANSGENIC MOUSE MODELS TO STUDY OVARIAN FUNCTIONU54HD007495 · NICHD · BAYLOR COLLEGE OF MEDICINE · PI RICHARDS, JOANNE STEWART · 1998 to 2013
$19.9M
LH ACTION IN OVARIAN CELL DIFFERENTIATIONR37HD016229 · NICHD · BAYLOR COLLEGE OF MEDICINE · PI RICHARDS, JOANNE S. · 1998 to 2007
$2.0M
LH ACTION IN OVARIAN CELL DIFFERENTIATIONR01HD016229 · NICHD · BAYLOR COLLEGE OF MEDICINE · PI RICHARDS, JOANNE STEWART · 1985 to 2013
$1.9M
GROWTH AND DIFFERENTIATION IN EUKARYOTEST32HD007495 · NICHD · SALK INSTITUTE FOR BIOLOGICAL STUDIES · PI KINTNER, CHRISTOPHER ROBERT · 1995 to 2009
$1.6M
LH Action in Ovarian Cell DifferentiationR56HD016229 · NICHD · BAYLOR COLLEGE OF MEDICINE · PI RICHARDS, JOANNE STEWART · 2008 to 2008
$326k
TRANSGENIC ANIMAL--COREP30HD007495 · NICHD · BAYLOR COLLEGE OF MEDICINE · PI GLASSER, STANLEY R · 1985 to 1997
–
NICHD NIH HHS HD-07495NICHD NIH HHS HD-16229NICHD NIH HHS P30 HD007495NICHD NIH HHS R01 HD016229NICHD NIH HHS R37 HD016229NICHD NIH HHS R56 HD016229NICHD NIH HHS T32 HD007495NICHD NIH HHS U54 HD007495
6 · The paper itself

Abstract

Neuregulin 1 (NRG1) is induced in granulosa cells by LH and acts on granulosa and cumulus cells during ovulation. In this study, we sought to determine the role of NRG1 in oocyte maturation by generating a granulosa cell-specific Nrg1 knockout mouse (Nrg1(flox/flox);Cyp19a1Cre mice [gcNrg1KO]). In the gcNrg1KO mice, meiosis was induced 2 hours earlier than in control mice. More than 60% of the oocytes in the mutant mice spontaneously re-resumed meiosis beyond the MII stage. The percentage of successful fertilization was comparable in oocytes of both genotypes collected at 14 or 16 hours after human chorionic gonadotropin injection but was significantly lower in oocytes of the gcNrg1KO mice at 18 or 20 hours. The number of pups per litter was significantly decreased in gcNrg1KO mice. To determine the molecular events associated with the abnormal progression of meiosis in the gcNrg1KO mouse oocytes, the defects of cumulus/granulosa cell functions were analyzed. The expression of genes involved in luteinization and cumulus expansion was significantly higher at 2 hours after human chorionic gonadotropin injection in the gcNrg1KO mice; this was related to abnormal activation of protein kinase C (PKC) and phosphorylation of connexin-43 in cumulus cells. Changes in connexin-43 by PKC might lead to early meiotic resumption of oocytes in gcNrg1KO mice. We conclude that NRG1 is induced by LH in mural granulosa cells and exerts an important regulatory role in oocyte meiotic maturation and competence by reducing PKC activation in cumulus cells and preventing premature progression to the MII stage that leads to abnormal fertilization and fertility.

Indexed as

AnimalsCells, CulturedCumulus CellsFemaleFertilizationGap JunctionsHumansLuteinizationMaleMeiosisMice, Inbred C57BLMice, KnockoutNeuregulin-1OocytesOvarian FolliclePromoter Regions, GeneticNeuregulin-1Nrg1 protein, mouseProtein Kinase C

Identifiers

PMID24650175
PMCPMC4004775
OpenAlexW2077597006

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.