Evidence map›Paper›PMID 29115986›Full record

ArticleSkeletal muscle2017

The breaking and making of healthy adult human skeletal muscle in vivo.

Abigail L Mackey, Michael Kjaer

Abstract read
In one paragraph

Article in Skeletal muscle, 2017. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 58 papers, 3 of them syntheses that pooled it.

0numbers the graph read from it
0cells of the map it votes in
58citing papers in PubMed, 3 pooled it
–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

58 citing papers in PubMed, 3 syntheses or guidelines pooled it.

  1. Pooled it
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  8. Neuromuscular electrical stimulation and protein during bed rest increases CD11bApplied physiology, nutrition, and metabolism = Physiologie appliquee, nutrition et metabolisme · 2020
    Trial
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  10. Myonuclear Dynamics After Skeletal Muscle Surgical Injury.FASEB journal : official publication of the Federation of American Societies for Experimental Biology · 2026
    Article
  11. Review
  12. Myonuclear Dynamics After Skeletal Muscle Surgical Injury.bioRxiv : the preprint server for biology · 2026
    Article
  13. Twisting Paths: The Paradox of Fiber Branching in Muscle Regeneration.International journal of molecular sciences · 2026
    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

2 authors.

Abigail L MackeyInstitute of Sports Medicine Copenhagen, Department of Orthopaedic Surgery M, Bispebjerg Hospital, Copenhagen, Denmark. abigailmac@sund.ku.dk.
Michael KjaerInstitute of Sports Medicine Copenhagen, Department of Orthopaedic Surgery M, Bispebjerg Hospital, Copenhagen, Denmark.

Funding

No grant is acknowledged in the PubMed record.

6 · The paper itself

Abstract

backgroundWhile muscle regeneration has been extensively studied in animal and cell culture models, in vivo myogenesis in adult human skeletal muscle has not been investigated in detail.

methodsUsing forced lengthening contractions induced by electrical stimulation, we induced myofibre injury in young healthy males. Muscle biopsies were collected from the injured leg 7 and 30 days after muscle injury and from the uninjured leg as a control. Immuno-stained single muscle fibres and muscle cross sections were studied by wide-field and confocal microscopy. Samples were also studied at the ultra-structural level by electron microscopy.

resultsMicroscopy of single muscle fibres in 3 dimensions revealed a repeating pattern of necrotic and regenerating zones along the length of the same myofibre, characterised by extensive macrophage infiltration alongside differentiating myogenic progenitor cells and myotubes: the hallmarks of myogenesis. The myofibre basement membrane was preserved during these processes and interestingly was seen at a later stage as a second basement membrane surrounding the regenerating fibres.

conclusionsThis is the first work to document in vivo myogenesis in humans in detail and highlights the importance of the basement membrane in the process of regeneration. In addition, it provides insight into parallels between the regeneration of adult skeletal muscle in mouse and man, confirming that this model may be a useful tool in investigating myofibre and matrix formation, as well as specific cell types, during regeneration from the perspective of human muscle.

Indexed as

Muscle DevelopmentRegenerationAdultElectric StimulationHumansMaleMuscle ContractionMuscle Fibers, SkeletalMuscle, SkeletalYoung AdultBasement membraneHuman myogenesisNecrosisSatellite cells

Identifiers

PMID29115986
PMCPMC5688812

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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.