Evidence map›Paper›PMID 25147160›Full record

ArticleMolecular human reproduction2015

Use of DEAD-box polypeptide-4 (Ddx4) gene promoter-driven fluorescent reporter mice to identify mitotically active germ cells in post-natal mouse ovaries.

Eun-Sil Park, Jonathan L Tilly

Open access · bronzeAbstract read
In one paragraph

Article in Molecular human reproduction, 2015. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 37 papers.

0numbers the graph read from it
0cells of the map it votes in
37citing papers in PubMed
8.0field-weighted citation impact, top 2% 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

37 citing papers in PubMed, 53 citations in OpenAlex.

  1. Review
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  6. The process of ovarian aging: it is not just about oocytes and granulosa cells.Journal of assisted reproduction and genetics · 2022
    Review
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  19. Role of stem cells in fertility preservation: current insights.Stem cells and cloning : advances and applications · 2019
    Article
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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

2 authors at 1 institution in 1 country.

Eun-Sil ParkDepartment of Biology, Laboratory of Aging and Infertility Research, Northeastern University, Boston, MA 02115, USA.
Jonathan L TillyDepartment of Biology, Laboratory of Aging and Infertility Research, Northeastern University, Boston, MA 02115, USA j.tilly@neu.edu.
Northeastern University · US

Funding

Origins/Functions of Mammalian Female Germline Stem CellR37AG012279 · NIA · NORTHEASTERN UNIVERSITY · PI TILLY, JONATHAN LEE · 2006 to 2015
$3.3M
NIA NIH HHS R37 AG012279NIA NIH HHS R37-AG012279
6 · The paper itself

Abstract

Several laboratories have independently isolated mitotically active germ cells, termed female germline stem cells or oogonial stem cells (OSCs), from adult mouse ovaries. However, a recent study using Ddx4-Cre;Rosa26 reporter mice concluded that such germ cells do not exist. Given the disparity in conclusions drawn in this study compared with others, we felt it was important to re-assess the utility of Ddx4-Cre;Rosa26 reporter mice for identification of OSCs in adult mouse ovaries. Transgenic Ddx4-Cre mice were crossed with Rosa26(tdTm/tdTm) mice to drive restricted tomato red (tdTm) gene expression in cells in which the Ddx4 gene promoter has been activated. Crude dispersion of ovaries from recombined offspring generated cell fractions containing tdTm-positive immature oocytes, which are incapable of proliferation and thus probably represent the uncharacterized reporter-positive ovarian cells identified in the paper Zhang et al. (2012) as being mitotically inactive. Dispersed ovaries further subjected to fluorescence-activated cell sorting yielded a large population of non-germline tdTm-positive cells, indicative of promoter 'leakiness' in the Ddx4-Cre mouse line. Nonetheless, a small percentage of these tdTm-positive cells exhibited externalized (extracellular, ec) expression of Ddx4 protein (ecDdx4-positive), expressed markers of primitive germ cells but not of oocytes, and actively proliferated in culture, all of which are characteristic features of OSCs. Thus, crude dispersion of ovaries collected from Ddx4 gene promoter-driven reporter mice is not, by itself, a reliable approach to identify OSCs, whereas the same ovarian dispersates further subjected to cell sorting strategies yield purified OSCs that can be expanded in culture.

Indexed as

Promoter Regions, GeneticAdult Stem CellsAnimalsDEAD-box RNA HelicasesFemaleFlow CytometryGerm CellsMiceMice, TransgenicMitosisOvaryDdx4 protein, mouseDEAD-box RNA HelicasesDdx4germline stem celloocyteoogenesisoogonial stem cell

Identifiers

PMID25147160
PMCPMC4275040
OpenAlexW2105559667

What OpenQuestion holds

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Registered trials

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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.