Cited by 124Adipose Tissue and MetabolismMetabolism, Diabetes, and CancerMitochondrial Function and Pathology

PGC-1α Integrates Insulin Signaling, Mitochondrial Regulation, and Bioenergetic Function in Skeletal Muscle

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Pagel-Langenickel, Ines, Bao, Jianjun, Joseph, Joshua J., Schwartz, Daniel R., Mantell, Benjamin S., Xu, Xiuli, Raghavachari, Nalini, Sack, Michael N.·2008·Journal of Biological Chemistry

Abstract

The pathophysiology underlying mitochondrial dysfunction in insulin-resistant skeletal muscle is incompletely characterized. To further delineate this we investigated the interaction between insulin signaling, mitochondrial regulation, and function in C2C12 myotubes and in skeletal muscle. In myotubes elevated insulin and glucose disrupt insulin signaling, mitochondrial biogenesis, and mitochondrial bioenergetics. The insulin-sensitizing thiazolidinedione pioglitazone restores these perturbations in parallel with induction of the mitochondrial biogenesis regulator PGC-1alpha. Overexpression of PGC-1alpha rescues insulin signaling and mitochondrial bioenergetics, and its silencing concordantly disrupts insulin signaling and mitochondrial bioenergetics. In primary skeletal myoblasts pioglitazone also up-regulates PGC-1alpha expression and restores the insulin-resistant mitochondrial bioenergetic profile. In parallel, pioglitazone up-regulates PGC-1alpha in db/db mouse skeletal muscle. Interestingly, the small interfering RNA knockdown of the insulin receptor in C2C12 myotubes down-regulates PGC-1alpha and attenuates mitochondrial bioenergetics. Concordantly, mitochondrial bioenergetics are blunted in insulin receptor knock-out mouse-derived skeletal myoblasts. Taken together these data demonstrate that elevated glucose and insulin impairs and pioglitazone restores skeletal myotube insulin signaling, mitochondrial regulation, and bioenergetics. Pioglitazone functions in part via the induction of PGC-1alpha. Moreover, PGC-1alpha is identified as a bidirectional regulatory link integrating insulin-signaling and mitochondrial homeostasis in skeletal muscle.

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Authors
Pagel-Langenickel, I., Bao, J., Joseph, J. J., Schwartz, D. R., Mantell, B. S., Xu, X., Raghavachari, N., & Sack, M. N.
Affiliations
National Institutes of Health (US)
Corresponding author
Sack, Michael N.
Venue
Journal of Biological Chemistry
Publisher
Elsevier BV
Published
2008-08
Volume
283
Issue
33
Pages
22464-22472
ISSN
0021-9258 (ISSN-L)
OpenAlex
W2087692517
Cited by
124
References
41
Citations by year
2026: 5 · 2025: 5 · 2024: 8 · 2023: 4 · 2022: 3 · 2021: 4 · 2020: 7 · 2019: 9 · 2018: 6 · 2017: 8 · 2016: 4 · 2015: 7 · 2014: 5 · 2013: 8 · 2012: 5
FWCI
8.13
Type
journal article
Language
en
Open access
Locations
  • Journal of Biological Chemistry (publishedVersion, cc-by)
  • PubMed Central (publishedVersion)
  • PubMed (publishedVersion)
Funders
  • National Institutes of Health
  • National Heart, Lung, and Blood Institute
  • NHLBI Division of Intramural Research
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 › Mitochondrial Function and Pathology
Keywords
PGC-1α, insulin signaling, insulin resistance, skeletal muscle, mitochondrial biogenesis, mitochondrial bioenergetics, pioglitazone, thiazolidinediones, insulin receptor, glucose, mitochondrial homeostasis, C2C12 myotubes, db/db mice
MeSH terms
Peroxisome Proliferator-Activated Receptor Gamma Coactivator 1-alpha, Pioglitazone, Animals, Cell Line, DNA, Mitochondrial, Energy Metabolism, Gene Expression Regulation, Insulin, Male, Mice, Inbred Strains, Mitochondria, Muscle, Oxygen Consumption, Receptor, Insulin, RNA, Transcription Factors, Signal Transduction, Trans-Activators, Muscle, Skeletal, Muscle Fibers, Skeletal, Thiazolidinediones, Mice

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