Evidence map›Paper›PMID 25942471›Full record

ArticlePloS one2015

P21 deficiency delays regeneration of skeletal muscular tissue.

Nobuaki Chinzei, Shinya Hayashi, Takeshi Ueha, Takaaki Fujishiro, Noriyuki Kanzaki, Shingo Hashimoto, Shuhei Sakata, Shinsuke Kihara, Masahiko Haneda, Yoshitada Sakai and 2 more

Open access · goldAbstract read
In one paragraph

Article in PloS one, 2015. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 20 papers.

0numbers the graph read from it
0cells of the map it votes in
20citing papers in PubMed
2.0field-weighted citation impact, top 14% 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

20 citing papers in PubMed, 46 citations in OpenAlex.

  1. Article
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  6. Journal of microbiology and biotechnology · 2022
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  10. Review
  11. In vivo analysis of γH2AX+ cells in skeletal muscle from aged and obese humans.FASEB journal : official publication of the Federation of American Societies for Experimental Biology · 2020
    Article
  12. Review
  13. Article
  14. Article
  15. Review
  16. Review
  17. p21BMC musculoskeletal disorders · 2017
    Article
  18. Article
  19. CDK inhibitors for muscle stem cell differentiation and self-renewal.The journal of physical fitness and sports medicine · 2017
    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

12 authors at 1 institution in 1 country.

Nobuaki ChinzeiDepartment of Orthopedic Surgery, Kobe University Graduate School of Medicine, Kobe, Japan.
Shinya HayashiDepartment of Orthopedic Surgery, Kobe University Graduate School of Medicine, Kobe, Japan.
Takeshi UehaDivision of Rehabilitation Medicine, Kobe University Graduate School of Medicine, Kobe, Japan.
Takaaki FujishiroDepartment of Orthopedic Surgery, Kobe University Graduate School of Medicine, Kobe, Japan.
Noriyuki KanzakiDepartment of Orthopedic Surgery, Kobe University Graduate School of Medicine, Kobe, Japan.
Shingo HashimotoDepartment of Orthopedic Surgery, Kobe University Graduate School of Medicine, Kobe, Japan.
Shuhei SakataDepartment of Orthopedic Surgery, Kobe University Graduate School of Medicine, Kobe, Japan.
Shinsuke KiharaDepartment of Orthopedic Surgery, Kobe University Graduate School of Medicine, Kobe, Japan.
Masahiko HanedaDepartment of Orthopedic Surgery, Kobe University Graduate School of Medicine, Kobe, Japan.
Yoshitada SakaiDivision of Rehabilitation Medicine, Kobe University Graduate School of Medicine, Kobe, Japan.
Ryosuke KurodaDepartment of Orthopedic Surgery, Kobe University Graduate School of Medicine, Kobe, Japan.
Masahiro KurosakaDepartment of Orthopedic Surgery, Kobe University Graduate School of Medicine, Kobe, Japan.
Kobe University · JP

Funding

No grant is acknowledged in the PubMed record.

6 · The paper itself

Abstract

The potential relationship between cell cycle checkpoint control and tissue regeneration has been indicated. Despite considerable research being focused on the relationship between p21 and myogenesis, p21 function in skeletal muscle regeneration remains unclear. To clarify this, muscle injury model was recreated by intramuscular injection of bupivacaine hydrochloride in the soleus of p21 knockout (KO) mice and wild type (WT) mice. The mice were sacrificed at 3, 14, and 28 days post-operation. The results of hematoxylin-eosin staining and immunofluorescence of muscle membrane indicated that muscle regeneration was delayed in p21 KO mice. Cyclin D1 mRNA expression and both Ki-67 and PCNA immunohistochemistry suggested that p21 deficiency increased cell cycle and muscle cell proliferation. F4/80 immunohistochemistry also suggested the increase of immune response in p21 KO mice. On the other hand, both the mRNA expression and western blot analysis of MyoD, myogenin, and Pax7 indicated that muscular differentiation was delayed in p21KO mice. Considering these results, we confirmed that muscle injury causes an increase in cell proliferation. However, muscle differentiation in p21 KO mice was inhibited due to the low expression of muscular synthesis genes, leading to a delay in the muscular regeneration. Thus, we conclude that p21 plays an important role in the in vivo healing process in muscular injury.

Indexed as

AnimalsAntigens, DifferentiationCell MembraneCyclin D1Cyclin-Dependent Kinase Inhibitor p21Ki-67 AntigenMiceMice, KnockoutMuscle DevelopmentMuscle, SkeletalProliferating Cell Nuclear AntigenRegenerationRNA, MessengerWound HealingAntigens, DifferentiationCyclin D1Cyclin-Dependent Kinase Inhibitor p21Ki-67 Antigenmonocyte-macrophage differentiation antigenProliferating Cell Nuclear AntigenRNA, Messenger

Identifiers

PMID25942471
PMCPMC4420284
OpenAlexW307632218

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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.