Evidence map›Paper›PMID 23300713›Full record

ArticlePloS one2012

Characterization of an acute muscle contraction model using cultured C2C12 myotubes.

Yasuko Manabe, Shouta Miyatake, Mayumi Takagi, Mio Nakamura, Ai Okeda, Taemi Nakano, Michael F Hirshman, Laurie J Goodyear, Nobuharu L Fujii

Open access · goldAbstract read
In one paragraph

Article in PloS one, 2012. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 63 papers, 1 of them a synthesis that pooled it.

0numbers the graph read from it
0cells of the map it votes in
63citing papers in PubMed, 1 pooled it
2.7field-weighted citation impact, top 9% 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

63 citing papers in PubMed, 1 synthesis or guideline pooled it, 117 citations in OpenAlex.

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3 more citing papers are in PubMed but not listed here.

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

9 authors at 3 institutions in 2 countries.

Yasuko ManabeDepartment of Health Promotion Sciences, Graduate School of Human Health Sciences, Tokyo Metropolitan University, Tokyo, Japan.
Shouta Miyatake
Mayumi Takagi
Mio Nakamura
Ai Okeda
Taemi Nakano
Michael F Hirshman
Laurie J Goodyear
Nobuharu L Fujii
Tokyo Metropolitan University · JPHarvard University · USJoslin Diabetes Center · US

Funding

SPECIAL ASSAY COREP30DK036836 · NIDDK · JOSLIN DIABETES CENTER · PI JEAN E. SCHAFFER · 1986 to 2026
$50.5M
EXERCISE REGULATION OF GLUCOSE UPTAKE IN SKELETAL MUSCLER01AR045670 · NIAMS · JOSLIN DIABETES CENTER · PI GOODYEAR, LAURIE J · 1998 to 2012
$4.6M
EXERCISE AND SKELETAL MUSCLE SIGNALING MECHANISMSR01AR042238 · NIAMS · JOSLIN DIABETES CENTER · PI GOODYEAR, LAURIE J · 1997 to 2013
$4.2M
EXERCISE AND SKELETAL MUSCLE SIGNALING MECHANISMSR29AR042238 · NIAMS · JOSLIN DIABETES CENTER · PI GOODYEAR, LAURIE J · 1993 to 1996
–
NIAMS NIH HHS AR42238NIAMS NIH HHS AR45670NIAMS NIH HHS R01 AR042238NIAMS NIH HHS R01 AR045670NIDDK NIH HHS P30 DK036836
6 · The paper itself

Abstract

A cultured C2C12 myotube contraction system was examined for application as a model for acute contraction-induced phenotypes of skeletal muscle. C2C12 myotubes seeded into 4-well rectangular plates were placed in a contraction system equipped with a carbon electrode at each end. The myotubes were stimulated with electric pulses of 50 V at 1 Hz for 3 ms at 997-ms intervals. Approximately 80% of the myotubes were observed to contract microscopically, and the contractions lasted for at least 3 h with electrical stimulation. Calcium ion (Ca²⁺) transient evoked by the electric pulses was detected fluorescently with Fluo-8. Phosphorylation of protein kinase B/Akt (Akt), 5' AMP-activated protein kinase (AMPK), p38 mitogen-activated protein kinase (p38), and c-Jun NH2-terminal kinase (JNK)1/2, which are intracellular signaling proteins typically activated in exercised/contracted skeletal muscle, was observed in the electrically stimulated C2C12 myotubes. The contractions induced by the electric pulses increased glucose uptake and depleted glycogen in the C2C12 myotubes. C2C12 myotubes that differentiated after exogenous gene transfection by a lipofection or an electroporation method retained their normal contractile ability by electrical stimulation. These findings show that our C2C12 cell contraction system reproduces the muscle phenotypes that arise invivo (exercise), in situ (hindlimb muscles in an anesthetized animal), and invitro (dissected muscle tissues in incubation buffer) by acute muscle contraction, demonstrating that the system is applicable for the analysis of intracellular events evoked by acute muscle contraction.

Indexed as

Muscle ContractionAnimalsCalcium SignalingCell DifferentiationCell LineElectric StimulationGlucoseGlycogenL-Lactate DehydrogenaseMiceMitogen-Activated Protein Kinase 8Models, BiologicalMuscle Fibers, SkeletalPhosphoproteinsPhosphorylationProtein Processing, Post-TranslationalGlucoseGlycogenL-Lactate DehydrogenaseMitogen-Activated Protein Kinase 8PhosphoproteinsRecombinant Proteins

Identifiers

PMID23300713
PMCPMC3534077
OpenAlexW2096173059

What OpenQuestion holds

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LicenceCC BY
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.