Cited by 257Adipose Tissue and MetabolismMetabolism, Diabetes, and CancerMuscle Physiology and Disorders

A role for the transcriptional coactivator PGC-1α in muscle refueling.

Open access
Wende, Adam R., Schaeffer, Paul J., Parker, Glendon J., Zechner, Christoph, Han, Dong-Ho, Chen, May M., Hancock, Chad R., Lehman, John J. +4 more·2007·Journal of Biological Chemistry

Abstract

The transcriptional coactivator peroxisome proliferator-activated receptor gamma coactivator-1alpha (PGC-1alpha) has been identified as an inducible regulator of mitochondrial function. Skeletal muscle PGC-1alpha expression is induced post-exercise. Therefore, we sought to determine its role in the regulation of muscle fuel metabolism. Studies were performed using conditional, muscle-specific, PGC-1alpha gain-of-function and constitutive, generalized, loss-of-function mice. Forced expression of PGC-1alpha increased muscle glucose uptake concomitant with augmentation of glycogen stores, a metabolic response similar to post-exercise recovery. Induction of muscle PGC-1alpha expression prevented muscle glycogen depletion during exercise. Conversely, PGC-1alpha-deficient animals exhibited reduced rates of muscle glycogen repletion post-exercise. PGC-1alpha was shown to increase muscle glycogen stores via several mechanisms including stimulation of glucose import, suppression of glycolytic flux, and by down-regulation of the expression of glycogen phosphorylase and its activating kinase, phosphorylase kinase alpha. These findings identify PGC-1alpha as a critical regulator of skeletal muscle fuel stores.

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Crossref · 10.1074/jbc.m707006200

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  • High-level overexpression of PGC-1α may reduce insulin sensitivity via reduced glycolysis and/or glucose oxidation or myofibrillar disruption/myopathy, potentially limiting exercise tolerance.

    “By contrast, highlevel overexpression of PGC-1␣ may actually reduce insulin sensitivity via reduced glycolysis and/or glucose oxidation (265) or myofibrillar disruption/myopathy, potentially limiting exercise tolerance.”
  • In these animals, both muscle glucose uptake and glycogen deposition were increased.

    “In these animals, both muscle glucose uptake and glycogen deposition were increased.”
  • Inducible overexpression of PGC-1α in skeletal muscle results in increased mitochondrial density and a robust increase in expression of OXPHOS genes and genes necessary for fatty acid oxidation.

    “Inducible overexpression of PGC-1␣ in skeletal muscle ( 265) results in increased mitochondrial density and a robust increase in expression of OXPHOS genes and genes necessary for fatty acid oxidation.”
  • Although low-intensity exercise performance did not differ in this model, high-performance exercise was impaired, in parallel with failure to mobilize stored glycogen.

    “Although low-intensity exercise performance did not differ in this model, high-performance exercise was impaired, in parallel with failure to mobilize stored glycogen.”

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Authors
Wende, A. R., Schaeffer, P. J., Parker, G. J., Zechner, C., Han, D.-H., Chen, M. M., Hancock, C. R., Lehman, J. J., Huss, J. M., McClain, D. A., Holloszy, J. O., & Kelly, D. P.
Affiliations
  • Washington University in St. Louis (US)
  • University of Utah (US)
Corresponding author
Kelly, Daniel P.
Venue
Journal of Biological Chemistry
Publisher
Elsevier BV
Published
2007-12
Volume
282
Issue
50
Pages
36642-36651
ISSN
0021-9258 (ISSN-L)
OpenAlex
W2130246533
Cited by
257
References
69
Citations by year
2026: 2 · 2025: 8 · 2024: 5 · 2023: 6 · 2022: 7 · 2021: 9 · 2020: 10 · 2019: 10 · 2018: 15 · 2017: 18 · 2016: 14 · 2015: 10 · 2014: 26 · 2013: 23 · 2012: 17
FWCI
13.42
Type
journal article
Language
en
Open access
Locations
  • Journal of Biological Chemistry (publishedVersion, cc-by-nc-nd)
  • PubMed (publishedVersion)
Funders
  • National Institutes of Health (5p60dk020579-35)
  • National Institute on Aging (R01AG000425)
  • National Heart, Lung, and Blood Institute (T32HL007275)
  • National Institute of Diabetes and Digestive and Kidney Diseases (R01DK045416, P60-DK-020579, P30DK056341, P30DK052574, R01DK074700)
Topics
  • Health Sciences › Medicine › Physiology › Adipose Tissue and Metabolism
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Molecular Biology › Metabolism, Diabetes, and Cancer
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Molecular Biology › Muscle Physiology and Disorders
Keywords
PGC-1α, glycogen stores, glucose uptake, post-exercise recovery, mitochondrial biogenesis, glycogen phosphorylase, glycolytic flux, glucose transport
MeSH terms
Peroxisome Proliferator-Activated Receptor Gamma Coactivator 1-alpha, Animals, Glucose, Glycogen, Mice, Transgenic, Mitochondria, Muscle, Muscle Proteins, Phosphorylase Kinase, Transcription Factors, Trans-Activators, Muscle, Skeletal, Glycogen Phosphorylase, Mice

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