Evidence map›Paper›PMID 19388011›Full record

ArticleJournal of cellular physiology2009

Asymmetric distribution of UCH-L1 in spermatogonia is associated with maintenance and differentiation of spermatogonial stem cells.

Jinping Luo, Susan Megee, Ina Dobrinski

Open access · greenAbstract read
In one paragraph

Article in Journal of cellular physiology, 2009. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 51 papers.

0numbers the graph read from it
0cells of the map it votes in
51citing papers in PubMed
5.7field-weighted citation impact, top 5% 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

51 citing papers in PubMed, 114 citations in OpenAlex.

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  13. Molecular phenotyping of domestic cat (Theriogenology wild · 2023
    Article
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  15. Sertoli cell and spermatogonial development in pigs.Journal of animal science and biotechnology · 2022
    Article
  16. Review
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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.

Jinping LuoDepartment of Clinical Studies, Center for Animal Transgenesis and Germ Cell Research, School of Veterinary Medicine, University of Pennsylvania, Kennett Square, PA, USA.
Susan Megee
Ina Dobrinski
University of Pennsylvania · US

Funding

TRANSPLANTATION OF TESTIS STEM CELLS IN LARGE ANIMALSR01RR017359 · NCRR · UNIVERSITY OF PENNSYLVANIA · PI DOBRINSKI, INA · 2002 to 2011
$3.6M
NCRR NIH HHS 2 R01 RR 17359-06.NCRR NIH HHS R01 RR017359
6 · The paper itself

Abstract

Asymmetric division of germline stem cells in vertebrates was proposed a century ago; however, direct evidence for asymmetric division of mammalian spermatogonial stem cells (SSCs) has been scarce. Here, we report that ubiquitin carboxy-terminal hydrolase 1 (UCH-L1) is expressed in type A (A(s), A(pr), and A(al)) spermatogonia located at the basement membrane (BM) of seminiferous tubules at high and low levels, but not in differentiated germ cells distant from the BM. Asymmetric segregation of UCH-L1 was associated with self-renewal versus differentiation divisions of SSCs as defined by co-localization of UCH-L1(high) and PLZF, a known determinant of undifferentiated SSCs, versus co-localization of UCH-L1(low/-) with proteins expressed during SSC differentiation (DAZL, DDX4, c-KIT). In vitro, gonocytes/spermatogonia frequently underwent asymmetric divisions characterized by unequal segregation of UCH-L1 and PLZF. Importantly, we could also demonstrate asymmetric segregation of UCH-L1 and PLZF in situ in seminiferous tubules. Expression level of UCH-L1 in the immature testis where spermatogenesis was not complete was not affected by the location of germ cells relative to the BM, whereas UCH-L1-positive spermatogonia were exclusively located at the BM in the adult testis. Asymmetric division of SSCs appeared to be affected by interaction with supporting somatic cells and extracelluar matrix. These findings for the first time provide direct evidence for existence of asymmetric division during SSCs self-renewal and differentiation in mammalian spermatogenesis.

Indexed as

SpermatogoniaAge FactorsAnimalsBiomarkersCell DifferentiationCells, CulturedDEAD-box RNA HelicasesExtracellular MatrixKruppel-Like Transcription FactorsMaleProto-Oncogene Proteins c-kitRNA-Binding ProteinsStem CellsSwineTestisUbiquitin ThiolesteraseBiomarkersDEAD-box RNA HelicasesKruppel-Like Transcription FactorsProto-Oncogene Proteins c-kitRNA-Binding ProteinsUbiquitin Thiolesterase

Identifiers

PMID19388011
PMCPMC2732714
OpenAlexW1970448922

What OpenQuestion holds

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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.