Evidence map›Paper›PMID 19664993›Full record

ArticleCell stem cell2009

Dedifferentiating spermatogonia outcompete somatic stem cells for niche occupancy in the Drosophila testis.

X Rebecca Sheng, Crista M Brawley, Erika L Matunis

Open access · bronzeAbstract read
In one paragraph

Article in Cell stem cell, 2009. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 110 papers.

0numbers the graph read from it
0cells of the map it votes in
110citing papers in PubMed
15.4field-weighted citation impact, top 1% 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

110 citing papers in PubMed, 150 citations in OpenAlex.

  1. Article
  2. Article
  3. Niche-dependent modular regulation of the stem cell transcriptome separates cell identity and potential.Proceedings of the National Academy of Sciences of the United States of America · 2026
    Article
  4. Article
  5. Review
  6. Stem cell competition.Current topics in developmental biology · 2026
    Review
  7. Review
  8. Article
  9. Article
  10. Rewinding the clock: mechanisms of dedifferentiation.Current opinion in genetics & development · 2025
    Review
  11. Article
  12. Article
  13. Article
  14. Article
  15. Review
  16. Modulating DNA Polα Enhances Cell Reprogramming Across Species.bioRxiv : the preprint server for biology · 2024
    Article
  17. Review
  18. Article
  19. Article
  20. Article

50 more citing papers are in PubMed but not listed here.

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.

X Rebecca ShengDepartment of Cell Biology, Johns Hopkins University School of Medicine, Baltimore, MD 21205, USA.
Crista M Brawley
Erika L Matunis
Johns Hopkins University · US

Funding

CONTROL OF STEM CELL FATE IN DROSOPHILA SPERMATOGENESISR01HD040307 · NICHD · JOHNS HOPKINS UNIVERSITY · PI MATUNIS, ERIKA L · 2001 to 2014
$4.1M
Cellular plasticity in the Drosophila spermatogonial stem cell nicheR01HD052937 · NICHD · JOHNS HOPKINS UNIVERSITY · PI MATUNIS, ERIKA L · 2007 to 2020
$3.8M
NICHD NIH HHS HD052937NICHD NIH HHS R01 HD040307NICHD NIH HHS R01 HD052937
6 · The paper itself

Abstract

Differentiating cells can dedifferentiate to replace stem cells in aged or damaged tissues, but the underlying mechanisms are unknown. In the Drosophila testis, a cluster of stromal cells called the hub creates a niche by locally activating Janus kinase-signal transducer and activator of transcription (Jak-STAT) signaling in adjacent germline and somatic stem cells. Here, we establish a system to study spermatogonial dedifferentiation. Ectopically expressing the differentiation factor bag-of-marbles (Bam) removes germline stem cells from the niche. However, withdrawing ectopic Bam causes interconnected spermatogonia to fragment, move into the niche, exchange positions with resident somatic stem cells, and establish contact with the hub. Concomitantly, actin-based protrusions appear on subsets of spermatogonia, suggesting acquired motility. Furthermore, global downregulation of Jak-STAT signaling inhibits dedifferentiation, indicating that normal levels of pathway activation are required to promote movement of spermatogonia into the niche during dedifferentiation, where they outcompete somatic stem cells for niche occupancy.

Indexed as

SpermatogenesisAnimalsDrosophila melanogasterDrosophila ProteinsJanus KinasesMaleSignal TransductionSpermatogoniaSTAT Transcription FactorsStem Cell NicheTestisbam protein, DrosophilaDrosophila ProteinsJanus KinasesSTAT Transcription Factors

Identifiers

PMID19664993
PMCPMC2750779
OpenAlexW2068437602

What OpenQuestion holds

Textmetadata
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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.