Cited by 549Peroxisome Proliferator-Activated ReceptorsAdipose Tissue and MetabolismMetabolism, Diabetes, and Cancer

Adiponectin Increases Fatty Acid Oxidation in Skeletal Muscle Cells by Sequential Activation of AMP-Activated Protein Kinase, p38 Mitogen-Activated Protein Kinase, and Peroxisome Proliferator–Activated Receptor α

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Yoon, Myeong Jin, Lee, Gha Young, Chung, Jun-Jae, Ahn, Young Ho, Hong, Seung Hwan, Kim, Jae Bum·2006·Diabetes

Abstract

Adiponectin has recently received a great deal of attention due to its beneficial effects on insulin resistance and metabolic disorders. One of the mechanisms through which adiponectin exerts such effects involves an increase in fatty acid oxidation in muscle and liver. In the present study, we demonstrate that 5'-AMP-activated protein kinase (AMPK) and p38 mitogen-activated protein kinase (MAPK) are involved in the activation of peroxisome proliferator-activated receptor (PPAR)alpha by adiponectin in muscle cells. Adiponectin increases the transcriptional activity of PPARalpha and the expression of its target genes, including ACO, CPT1, and FABP3 in C2C12 myotubes. These effects were suppressed by the overexpression of a dominant-negative form of AMPK. Moreover, chemical inhibitors of AMPK and p38 MAPK potently repressed fatty acid oxidation and the induction of PPARalpha target gene expression by adiponectin. Interestingly, araA, an AMPK inhibitor, prevented the activation of p38 MAPK, whereas SB203580, a p38 MAPK inhibitor, did not affect AMPK activation, suggesting that p38 MAPK is a downstream signaling factor of AMPK. Taken together, these results suggest that adiponectin stimulates fatty acid oxidation in muscle cells by the sequential activation of AMPK, p38 MAPK, and PPARalpha.

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Authors
Yoon, M. J., Lee, G. Y., Chung, J.-J., Ahn, Y. H., Hong, S. H., & Kim, J. B.
Affiliations
Seoul National University (KR)
Venue
Diabetes
Published
2006-09-01
Volume
55
Issue
9
Pages
2562-2570
ISSN
  • 0012-1797 (ISSN-L)
  • 1939-327X
OpenAlex
W2139409926
Cited by
546
References
48
Citations by year
2026: 18 · 2025: 27 · 2024: 20 · 2023: 24 · 2022: 20 · 2021: 26 · 2020: 32 · 2019: 28 · 2018: 28 · 2017: 24 · 2016: 25 · 2015: 31 · 2014: 34 · 2013: 33 · 2012: 27
FWCI
11.89
Type
journal article
Language
en
Open access
Locations
  • Diabetes (publishedVersion)
  • PubMed (publishedVersion)
Funders
  • Ministry of Education and Human Resources Development
  • Directorate for Education and Human Resources
Topics
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Molecular Biology › Peroxisome Proliferator-Activated Receptors
  • Health Sciences › Medicine › Physiology › Adipose Tissue and Metabolism
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Molecular Biology › Metabolism, Diabetes, and Cancer
Keywords
adiponectin, fatty acid oxidation, skeletal muscle, AMPK, p38 MAPK, PPARα, C2C12 myotubes, PPARα target genes, acetyl-CoA oxidase, carnitine palmitoyltransferase 1, fatty acid binding protein 3, insulin resistance
MeSH terms
Animals, Carnitine O-Palmitoyltransferase, Cells, Cultured, Enzyme Activation, Fatty Acids, Humans, Multienzyme Complexes, Oxidation-Reduction, Transcription, Genetic, Signal Transduction, Protein Serine-Threonine Kinases, Muscle, Skeletal, Acyl-CoA Oxidase, PPAR alpha, p38 Mitogen-Activated Protein Kinases, Mice, Adiponectin, AMP-Activated Protein Kinases

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