Evidence map›Paper›PMID 21653894›Full record

ArticleBiology of reproduction2011

Stage-specific changes in GDNF expression by rat Sertoli cells: a possible regulator of the replication and differentiation of stem spermatogonia.

Daniel S Johnston, Edgar Olivas, Paul DiCandeloro, William W Wright

Open access · bronzeAbstract readComparative Study
In one paragraph

Article in Biology of reproduction, 2011. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 41 papers.

0numbers the graph read from it
0cells of the map it votes in
41citing papers in PubMed
8.6field-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

41 citing papers in PubMed, 82 citations in OpenAlex.

  1. Article
  2. Article
  3. Effects of Follicle-Stimulating Hormone on Human Sperm Motility In Vitro.International journal of molecular sciences · 2023
    Article
  4. Article
  5. Review
  6. Review
  7. Review
  8. Article
  9. Review
  10. Androgen Actions in the Testis and the Regulation of Spermatogenesis.Advances in experimental medicine and biology · 2021
    Review
  11. BRG1 Is Dispensable for Sertoli Cell Development and Functions in Mice.International journal of molecular sciences · 2020
    Article
  12. Article
  13. Article
  14. Regulation of GDNF expression in Sertoli cells.Reproduction (Cambridge, England) · 2019
    Review
  15. Article
  16. Article
  17. Review
  18. Article
  19. Article
  20. Article
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

4 authors at 1 institution in 1 country.

Daniel S JohnstonContraception, Woman's Health and Musculoskeletal Biology, Wyeth Research, Collegeville, Pennsylvania, USA.
Edgar Olivas
Paul DiCandeloro
William W Wright
Johns Hopkins University · US

Funding

PHS HHS U54055740
6 · The paper itself

Abstract

In the adult testis, the precise control of the self-renewing replication and differentiation of stem spermatogonia is fundamental to male fertility. Previous studies have shown that the replication of A single (A(s)) spermatogonia, a population that includes the stem cells, is maximal at stage I of the cycle of the rat seminiferous epithelium and minimal at stage VII, while the ratio of A-paired spermatogonia to A(s) spermatogonia increases from stages I to VII. It has been hypothesized that these changes in A(s) spermatogonia replication and differentiation result from changes in the expression of glial cell-line derived neurotrophic factor (GDNF) by Sertoli cells. To directly test this hypothesis, we used immunocytochemistry and confocal microscopy to demonstrate that within intact seminiferous tubules, GDNF is detectable only in Sertoli cells and that its amount and its location within these cells changes with progression of the stages of the cycle. The identification of Sertoli cells as the primary source of GDNF was confirmed by RT-PCR analysis of RNA isolated from purified populations of Sertoli cells, pachytene spermatocytes, and round spermatids. Stage-specific changes in GDNF expression were confirmed by quantifying GDNF mRNA in seminiferous tubules at defined stages of the cycle. Expression of this transcript was maximal at stage I, fell 14-fold by stage VIIc,d, and then increased 12-fold by stages XIII-XIV. This pattern of expression was the opposite of the control, cathepsin L mRNA. Taken together, these data support the hypothesis that cyclical changes in GDNF expression by Sertoli cells are responsible for the stage-specific replication and differentiation of stem spermatogonia, the foundational cells of spermatogenesis.

Indexed as

Gene Expression RegulationSpermatogenesisAdult Stem CellsAnimalsCells, CulturedCell SeparationGlial Cell Line-Derived Neurotrophic FactorImmunohistochemistryMaleMicroscopy, ConfocalProtein TransportRatsRats, Sprague-DawleyRNA, MessengerSeminiferous EpitheliumSertoli CellsGdnf protein, ratGlial Cell Line-Derived Neurotrophic FactorRNA, Messenger

Identifiers

PMID21653894
PMCPMC3184291
OpenAlexW2131202983

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.