Cited by 611Muscle Physiology and DisordersAdipose Tissue and MetabolismMetabolism, Diabetes, and Cancer

Skeletal muscle fiber-type switching, exercise intolerance, and myopathy in PGC-1α muscle-specific knock-out animals.

Open access
Handschin, Christoph, Chin, Sherry, Li, Ping, Liu, Fenfen, Maratos-Flier, Eleftheria, LeBrasseur, Nathan K., Yan, Zhen, Spiegelman, Bruce M.·2007·Journal of Biological Chemistry

Abstract

The transcriptional coactivator peroxisome proliferator-activated receptor gamma coactivator 1alpha (PGC-1alpha) is a key integrator of neuromuscular activity in skeletal muscle. Ectopic expression of PGC-1alpha in muscle results in increased mitochondrial number and function as well as an increase in oxidative, fatigue-resistant muscle fibers. Whole body PGC-1alpha knock-out mice have a very complex phenotype but do not have a marked skeletal muscle phenotype. We thus analyzed skeletal muscle-specific PGC-1alpha knock-out mice to identify a specific role for PGC-1alpha in skeletal muscle function. These mice exhibit a shift from oxidative type I and IIa toward type IIx and IIb muscle fibers. Moreover, skeletal muscle-specific PGC-1alpha knock-out animals have reduced endurance capacity and exhibit fiber damage and elevated markers of inflammation following treadmill running. Our data demonstrate a critical role for PGC-1alpha in maintenance of normal fiber type composition and of muscle fiber integrity following exertion.

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Crossref · 10.1074/jbc.m704817200

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  • Many of these phenotypes are recapitulated in a muscle-specific PGC-1α knockout line.

    “Many of these phenotypes are recapitulated in a muscle-specific PGC-1␣ knockout line (63, 64) (Table 2).”
  • Muscle is significantly more insulin sensitive in both whole-body and muscle-specific PGC-1α null mice.

    “Interestingly, muscle is significantly more insulin sensitive in both whole-body and muscle-specific PGC-1␣ null mice.”
  • In the muscle-specific knockout lines, reduction in food intake, body weight, and adiposity may contribute to insulin sensitivity.

    “In the muscle-specific knockout lines, reduction in food intake, body weight, and adiposity (despite decreased physical activity) may also contribute to insulin sensitivity (63, 64).”
  • PGC-1α muscle-specific knockout results in normal mitochondrial DNA but reduced OXPHOS mRNA by 30-40% (Handschin, 2007).

    “Handschin, PGC-1␣ muscle-specific Normal 30 -40% 2 mRNA | 2007 KO | (63, 64)”

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Research works printed but not linked: 5

  1. Czubryt, M. P., McAnally, J., Fishman, G. I., and Olson, E. N. (2003) Proc. Natl. Acad. Sci. U. S. A. 100, 1711-1716
  2. Handschin, C., Rhee, J., Lin, J., Tarr, P. T., and Spiegelman, B. M. (2003) Proc. Natl. Acad. Sci. U. S. A. 100, 7111-7116
  3. Mootha, V. K., Handschin, C., Arlow, D., Xie, X., St. Pierre, J., Sihag, S., Yang, W., Altshuler, D., Puigserver, P., Patterson, N., Willy, P. J., Schul- man, I. G., Heyman, R. A., Lander, E. S., and Spiegelman, B. M. (2004) Proc. Natl. Acad. Sci. U. S. A. 101, 6570 -6575
  4. Schreiber, S. N., Emter, R., Hock, M. B., Knutti, D., Cardenas, J., Podvinec, M., Oakeley, E. J., and Kralli, A. (2004) Proc. Natl. Acad. Sci. U. S. A. 101, 6472-6477
  5. Sandri, M., Lin, J., Handschin, C., Yang, W., Arany, Z. P., Lecker, S. H., Goldberg, A. L., and Spiegelman, B. M. (2006) Proc. Natl. Acad. Sci. U. S. A. 103, 16260 -16265

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Authors
Handschin, C., Chin, S., Li, P., Liu, F., Maratos-Flier, E., LeBrasseur, N. K., Yan, Z., & Spiegelman, B. M.
Affiliations
  • Harvard University (US)
  • Duke Medical Center (US)
  • Beth Israel Deaconess Medical Center (US)
  • Boston University (US)
Corresponding author
Spiegelman, Bruce M.
Venue
Journal of Biological Chemistry
Publisher
Elsevier BV
Published
2007-10
Volume
282
Issue
41
Pages
30014-30021
ISSN
0021-9258 (ISSN-L)
OpenAlex
W2020444654
Cited by
611
References
31
Citations by year
2026: 15 · 2025: 14 · 2024: 22 · 2023: 41 · 2022: 35 · 2021: 30 · 2020: 27 · 2019: 30 · 2018: 23 · 2017: 36 · 2016: 33 · 2015: 33 · 2014: 35 · 2013: 45 · 2012: 46
FWCI
13.11
Type
journal article
Language
en
Open access
Locations
  • Journal of Biological Chemistry (publishedVersion, cc-by)
  • PubMed (publishedVersion)
  • edoc (University of Basel) (acceptedVersion)
  • Zurich Open Repository and Archive (University of Zurich) (acceptedVersion, other-oa)
  • Digital Access to Scholarship at Harvard (DASH) (Harvard University) (submittedVersion, cc-by)
  • Zurich Open Repository and Archive (University of Zurich) (submittedVersion, other-oa)
  • Zurich Open Repository and Archive (University of Zurich)
  • edoc (University of Basel)
Funders
  • National Science Foundation
  • Muscular Dystrophy Association
  • Schweizerischer Nationalfonds zur Förderung der Wissenschaftlichen Forschung (110746)
  • Universität Zürich
  • National Institutes of Health (DK54477)
  • National Institute of Diabetes and Digestive and Kidney Diseases (DK54477, R01DK061562, R01DK054477, P30DK040561, DK 61562)
  • National Institute of Arthritis and Musculoskeletal and Skin Diseases (R01AR050429, AR 050429)
Topics
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Molecular Biology › Muscle Physiology and Disorders
  • Health Sciences › Medicine › Physiology › Adipose Tissue and Metabolism
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Molecular Biology › Metabolism, Diabetes, and Cancer
Keywords
PGC-1α, exercise intolerance, myopathy, muscle-specific knockout mice, type IIx fibers, type IIb muscle fibers, endurance capacity, muscle fiber damage, inflammation, mitochondrial function
MeSH terms
Animals, Glycolysis, Inflammation, Microscopy, Fluorescence, Models, Biological, Muscular Diseases, Oxygen, Physical Conditioning, Animal, Transcription Factors, Mice, Knockout, Muscle, Skeletal, Muscle Fibers, Fast-Twitch, Muscle Fibers, Slow-Twitch, Mice

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