Evidence map›Paper›PMID 19252894›Full record

ArticleDiabetologia2009

Potential role of TBC1D4 in enhanced post-exercise insulin action in human skeletal muscle.

J T Treebak, C Frøsig, C Pehmøller, S Chen, S J Maarbjerg, N Brandt, C MacKintosh, J R Zierath, D G Hardie, B Kiens and 3 more

Open access · hybridAbstract read
In one paragraph

Article in Diabetologia, 2009. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 65 papers.

0numbers the graph read from it
0cells of the map it votes in
65citing papers in PubMed
4.0field-weighted citation impact, top 6% 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

65 citing papers in PubMed, 119 citations in OpenAlex.

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  4. Exercise increases TBC1D1 phosphorylation in human skeletal muscle.American journal of physiology. Endocrinology and metabolism · 2011
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5 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

13 authors at 3 institutions in 3 countries.

J T TreebakCopenhagen Muscle Research Centre, Department of Exercise and Sport Sciences, University of Copenhagen, Copenhagen, Denmark.
C Frøsig
C Pehmøller
S Chen
S J Maarbjerg
N Brandt
C MacKintosh
J R Zierath
D G Hardie
B Kiens
E A Richter
H Pilegaard
J F P Wojtaszewski
University of Copenhagen · DKUniversity of Dundee · GBKarolinska Institutet · SE

Funding

Medical Research Council MC_U127084354
6 · The paper itself

Abstract

aims/hypothesisTBC1 domain family, member 4 (TBC1D4; also known as AS160) is a cellular signalling intermediate to glucose transport regulated by insulin-dependent and -independent mechanisms. Skeletal muscle insulin sensitivity is increased after acute exercise by an unknown mechanism that does not involve modulation at proximal insulin signalling intermediates. We hypothesised that signalling through TBC1D4 is involved in this effect of exercise as it is a common signalling element for insulin and exercise.

methodsInsulin-regulated glucose metabolism was evaluated in 12 healthy moderately trained young men 4 h after one-legged exercise at basal and during a euglycaemic-hyperinsulinaemic clamp. Vastus lateralis biopsies were taken before and immediately after the clamp.

resultsInsulin stimulation increased glucose uptake in both legs, with greater effects (approximately 80%, p < 0.01) in the previously exercised leg. TBC1D4 phosphorylation, assessed using the phospho-AKT (protein kinase B)substrate antibody and phospho- and site-specific antibodies targeting six phosphorylation sites on TBC1D4, increased at similar degrees to insulin stimulation in the previously exercised and rested legs (p < 0.01). However, TBC1D4 phosphorylation on Ser-318, Ser-341, Ser-588 and Ser-751 was higher in the previously exercised leg, both in the absence and in the presence of insulin (p < 0.01; Ser-588, p = 0.09; observed power = 0.39). 14-3-3 binding capacity for TBC1D4 increased equally (p < 0.01) in both legs during insulin stimulation. CONCLUSION/

interpretationWe provide evidence for site-specific phosphorylation of TBC1D4 in human skeletal muscle in response to physiological hyperinsulinaemia. The data support the idea that TBC1D4 is a nexus for insulin- and exercise-responsive signals that may mediate increased insulin action after exercise.

Indexed as

Adipose TissueAdultBiopsyBlood GlucoseDietDNA PrimersExerciseGTPase-Activating ProteinsHumansHyperinsulinismInsulinKnee JointLegMaleMuscle, SkeletalOxygen ConsumptionBlood GlucoseDNA PrimersGTPase-Activating ProteinsInsulinTBC1D1 protein, humanTBC1D4 protein, human

Identifiers

PMID19252894
PMCPMC3627047
OpenAlexW2000198788

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.