Evidence map›Paper›PMID 24879440›Full record

ArticleProceedings of the National Academy of Sciences of the United States of America2014

Skp1-Cullin-F-box (SCF)-type ubiquitin ligase FBXW7 negatively regulates spermatogonial stem cell self-renewal.

Mito Kanatsu-Shinohara, Ichiro Onoyama, Keiichi I Nakayama, Takashi Shinohara

Abstract read
In one paragraph

Article in Proceedings of the National Academy of Sciences of the United States of America, 2014. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 52 papers.

0numbers the graph read from it
0cells of the map it votes in
52citing papers in PubMed
–field-weighted citation impact
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

52 citing papers in PubMed.

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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

4 authors.

Mito Kanatsu-ShinoharaDepartment of Molecular Genetics, Graduate School of Medicine, Kyoto University, Kyoto 606-8501, Japan;Precursory Research for Embryonic Science and Technology (PRESTO) and mshinoha@virus.kyoto-u.ac.jp.
Ichiro OnoyamaDepartment of Molecular and Cellular Biology, Medical Institute of Bioregulation, Kyushu University, Fukuoka 812-8582, Japan.
Keiichi I NakayamaDepartment of Molecular and Cellular Biology, Medical Institute of Bioregulation, Kyushu University, Fukuoka 812-8582, JapanCore Research for Evolutionary Science and Technology (CREST), Japan Science and Technology Agency (JST), Tokyo 102-0076, Japan; and.
Takashi ShinoharaDepartment of Molecular Genetics, Graduate School of Medicine, Kyoto University, Kyoto 606-8501, Japan;Core Research for Evolutionary Science and Technology (CREST), Japan Science and Technology Agency (JST), Tokyo 102-0076, Japan; and.

Funding

No grant is acknowledged in the PubMed record.

6 · The paper itself

Abstract

Spermatogonial stem cells (SSCs) undergo self-renewal divisions to support spermatogenesis throughout life. Although several positive regulators of SSC self-renewal have been discovered, little is known about the negative regulators. Here, we report that F-box and WD-40 domain protein 7 (FBXW7), a component of the Skp1-Cullin-F-box-type ubiquitin ligase, is a negative regulator of SSC self-renewal. FBXW7 is expressed in undifferentiated spermatogonia in a cell cycle-dependent manner. Although peptidyl-prolyl cis/trans isomerase NIMA-interacting 1 (PIN1), essential for spermatogenesis, is thought to destroy FBXW7, Pin1 depletion decreased FBXW7 expression. Spermatogonial transplantation showed that Fbxw7 overexpression compromised SSC activity whereas Fbxw7 deficiency enhanced SSC colonization and caused accumulation of undifferentiated spermatogonia, suggesting that the level of FBXW7 is critical for self-renewal and differentiation. Screening of putative FBXW7 targets revealed that Fbxw7 deficiency up-regulated myelocytomatosis oncogene (MYC) and cyclin E1 (CCNE1). Although depletion of Myc/Mycn or Ccne1/Ccne2 compromised SSC activity, overexpression of Myc, but not Ccne1, increased colonization of SSCs. These results suggest that FBXW7 regulates SSC self-renewal in a negative manner by degradation of MYC.

Indexed as

AnimalsCell DifferentiationCell LineageCell ProliferationCells, CulturedF-Box ProteinsF-Box-WD Repeat-Containing Protein 7Gene DeletionGreen Fluorescent ProteinsHomeostasisKineticsMaleMiceMice, Inbred C57BLMice, KnockoutProtein IsoformsF-Box ProteinsF-Box-WD Repeat-Containing Protein 7Fbxw7 protein, mouseGreen Fluorescent ProteinsMyc protein, mouseProtein IsoformsProto-Oncogene Proteins c-mycUbiquitin-Protein Ligases

Identifiers

PMID24879440
PMCPMC4066470

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.