Evidence map›Paper›PMID 18818249›Full record

ArticleThe Journal of physiology2008

Co-expression of IGF-1 family members with myogenic regulatory factors following acute damaging muscle-lengthening contractions in humans.

Bryon R McKay, Ciara E O'Reilly, Stuart M Phillips, Mark A Tarnopolsky, Gianni Parise

Open access · greenAbstract read
In one paragraph

Article in The Journal of physiology, 2008. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 67 papers.

0numbers the graph read from it
0cells of the map it votes in
67citing papers in PubMed
5.2field-weighted citation impact, top 4% 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

67 citing papers in PubMed, 160 citations in OpenAlex.

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  9. Urine-derived stem cells genetically modified with IGF1 improve muscle regeneration.American journal of clinical and experimental urology · 2024
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  17. Sarcopenia in chronic liver disease: mechanisms and countermeasures.American journal of physiology. Gastrointestinal and liver physiology · 2021
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7 more citing papers are in PubMed but not listed here.

4 · The record

Corrections and comments

5 · Who and what money

Authors and funding

5 authors at 3 institutions in 2 countries.

Bryon R McKayDepartment of Kinesiology, McMaster University, Hamilton, Ontario, Canada L8S 4L8.
Ciara E O'Reilly
Stuart M Phillips
Mark A Tarnopolsky
Gianni Parise
International College of Applied Kinesiology-USA · USMcMaster University · CAPediatrics and Genetics · US

Funding

No grant is acknowledged in the PubMed record.

6 · The paper itself

Abstract

Muscle regeneration following injury is dependent on the ability of muscle satellite cells to activate, proliferate and fuse with damaged fibres. This process is controlled by the myogenic regulatory factors (MRF). Little is known about the temporal relation of the MRF with the expression of known myogenic growth factors (i.e. IGF-1) in humans following muscle damage. Eight subjects (20.6 +/- 2.1 years; 81.4 +/- 9.8 kg) performed 300 lengthening contractions (180 deg s(-1)) of their knee extensors in one leg on a dynamometer. Blood and muscle samples were collected before and at 4 (T4), 24 (T24), 72 (T72) and 120 h (T120) post-exercise. Mechano growth factor (MGF), IGF-1Ea and IGF-1Eb mRNA were quantified. Serum IGF-1 did not change over the post-exercise time course. IGF-1Ea and IGF-1Eb mRNA increased approximately 4- to 6-fold by T72 (P < 0.01) and MGF mRNA expression peaked at T24 (P = 0.005). MyoD mRNA expression increased approximately 2-fold at T4 (P < 0.05). Myf5 expression peaked at T24 (P < 0.05), while MRF4 and myogenin mRNA expression peaked at T72 (P < 0.05). Myf5 expression strongly correlated with the increase in MGF mRNA (r(2) = 0.83; P = 0.03), while MRF4 was correlated with both IGF-1Ea and -Eb (r(2) = 0.90; r(2) = 0.81, respectively; P < 0.05). Immunofluorescence analysis showed IGF-1 protein expression localized to satellite cells at T24, and to satellite cells and the myofibre at T72 and T120; IGF-1 was not detected at T0 or T4. These results suggest that the temporal response of MGF is probably related to the activation/proliferation phase of the myogenic programme as marked by an increase in both Myf5 and MyoD, while IGF-1Ea and -Eb may be temporally related to differentiation as marked by an increase in MRF4 and myogenin expression following acute muscle damage.

Indexed as

AdultAlternative SplicingBase SequenceDNA PrimersExerciseGene ExpressionHumansInsulin-Like Growth Factor IMaleMuscle ContractionMuscle, SkeletalMyoD ProteinMyogenic Regulatory Factor 5Myogenic Regulatory FactorsMyogeninRegenerationDNA PrimersInsulin-Like Growth Factor IMYF5 protein, humanMyoD1 myogenic differentiation proteinMyoD Proteinmyogenic factor 6Myogenic Regulatory Factor 5Myogenic Regulatory FactorsMyogeninMYOG protein, humanRNA, Messenger

Identifiers

PMID18818249
PMCPMC2655389
OpenAlexW2140539177

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.