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Characterization of the metabolic effects of irisin on skeletal muscle in vitro
Abstract
AIMS: This work explored the effects of irisin on metabolism, gene expression and mitochondrial content in cultured myocytes. METHODS: C2C12 myocytes were treated with various concentrations of irisin for various durations. Glycolysis and oxidative metabolism were quantified by measurement of extracellular acidification and oxygen consumption, respectively. Metabolic gene expression was measured by quantitative real-time polymerase chain reaction (qRT-PCR) and mitochondrial content was assessed by flow cytometry and confocal microscopy. RESULTS: Cells treated with irisin exhibited significantly increased oxidative metabolism. Irisin treatment also significantly increased mitochondrial uncoupling at various doses and durations. Lastly, treatment with irisin also significantly elevated metabolic gene expression including peroxisome proliferator-activated receptor γ coactivator-1 alpha (PGC-1α), nuclear respiratory factor 1 (NRF1), mitochondrial transcription factor A (TFAM), irisin, glucose transporter 4 (GLUT4) and mitochondrial uncoupling protein 3 (UCP3) leading to increased mitochondrial biogenesis. CONCLUSIONS: Our observations are the first to document increased metabolism in myocytes through irisin-mediated induction of mitochondrial biogenesis and uncoupling with corresponding gene expression. These observations support the need for further investigation into the therapeutic and pharmacological effects of irisin, as well as development of irisin-based therapy.
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“Irisin was described to stimulate lipolysis via HSL and to inhibit lipid accumulation in adipocytes [58,64].”
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Metadata
- Authors
- Vaughan, R. A., Gannon, N. P., Barberena, M. A., Garcia‐Smith, R., Bisoffi, M., Mermier, C. M., Conn, C. A., & Trujillo, K. A.
- Affiliations
- University of New Mexico (US)
- Corresponding author
- Vaughan, R. A.
- Venue
- Diabetes Obesity and Metabolism
- Publisher
- Wiley
- Published
- 2014-02-18
- Volume
- 16
- Issue
- 8
- Pages
- 711-718
- ISSN
- 1462-8902 (ISSN-L)
- 1463-1326
- OpenAlex
- W2000249408
- Cited by
- 150
- References
- 19
- Citations by year
- 2026: 7 · 2025: 11 · 2024: 11 · 2023: 10 · 2022: 15 · 2021: 15 · 2020: 14 · 2019: 15 · 2018: 5 · 2017: 14 · 2016: 9 · 2015: 15 · 2014: 9
- FWCI
- 10.41
- Type
- journal article
- Language
- en
- Open access
- closed
- Locations
- Diabetes Obesity and Metabolism (publishedVersion)
- PubMed (publishedVersion)
- Funders
- 2013 University of New Mexico- New Mexico Research Grant
- Topics
- Health Sciences › Medicine › Physiology (medical) › Adipose Tissue and Metabolism
- Life Sciences › Biochemistry, Genetics and Molecular Biology › Molecular Biology › Muscle Physiology and Disorders
- Life Sciences › Biochemistry, Genetics and Molecular Biology › Molecular Biology › Metabolism, Diabetes, and Cancer
- Keywords
- irisin, skeletal muscle, C2C12 myocytes, mitochondrial biogenesis, mitochondrial uncoupling, oxidative metabolism, glycolysis, PGC-1α, NRF1, TFAM, GLUT4, UCP3, metabolic gene expression, mitochondrial content
- MeSH terms
- Peroxisome Proliferator-Activated Receptor Gamma Coactivator 1-alpha, Animals, Cell Line, Cell Survival, DNA-Binding Proteins, Fibronectins, Gene Expression Regulation, Glycolysis, High Mobility Group Proteins, Humans, Kinetics, Mitochondria, Muscle, Muscle Proteins, Oxidative Phosphorylation, Recombinant Proteins, Transcription Factors, Muscle Fibers, Skeletal, Cell Proliferation, Nuclear Respiratory Factor 1, Mice, Mitochondrial Turnover
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