Cited by 81Muscle Physiology and DisordersNutrition and Health in AgingMetabolism, Diabetes, and Cancer

PDK4 drives metabolic alterations and muscle atrophy in cancer cachexia

Open access
Pin, Fabrizio, Novinger, Leah J., Huot, Joshua R., Harris, Robert A., Couch, Marion E., O'Connell, Thomas M., Bonetto, Andrea·2019·The FASEB Journal

Abstract

Cachexia is frequently accompanied by severe metabolic derangements, although the mechanisms responsible for this debilitating condition remain unclear. Pyruvate dehydrogenase kinase (PDK)4, a critical regulator of cellular energetic metabolism, was found elevated in experimental models of cancer, starvation, diabetes, and sepsis. Here we aimed to investigate the link between PDK4 and the changes in muscle size in cancer cachexia. High PDK4 and abnormal energetic metabolism were found in the skeletal muscle of colon‐26 tumor hosts, as well as in mice fed a diet enriched in Pirinixic acid, previously shown to increase PDK4 levels. Viral‐mediated PDK4 over‐expression in myotube cultures was sufficient to promote myofiber shrinkage, consistent with enhanced protein catabolism and mitochondrial abnormalities. On the contrary, blockade of PDK4 was sufficient to restore myotube size in C2C12 cultures exposed to tumor media. Our data support, for the first time, a direct role for PDK4 in promoting cancer‐associated muscle metabolic alterations and skeletal muscle atrophy.—Pin, F., Novinger, L. J., Huot, J. R., Harris, R. A., Couch, M. E., O'Connell, T. M., Bonetto, A. PDK4 drives metabolic alterations and muscle atrophy in cancer cachexia. FASEB J. 33, 7778–7790 (2019). www.fasebj.org

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Crossref · 10.1096/fj.201802799r

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65 of 65 references verified0 citation errors · 0 not checkable

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  • PDK4 is induced in cancer, starvation, diabetes, and sepsis.

    “Finally, key enzymes in ATP production such as pyruvate dehydrogenase kinase (PDK)4 have been recently reported to be induced in cancer, starvation, diabetes, and sepsis, and its overexpression promotes myofiber shrinkage while its inhibition blunts atrophy84.”
  • PDK4 inhibition blunts atrophy.

    “Finally, key enzymes in ATP production such as pyruvate dehydrogenase kinase (PDK)4 have been recently reported to be induced in cancer, starvation, diabetes, and sepsis, and its overexpression promotes myofiber shrinkage while its inhibition blunts atrophy84.”
  • PDK4 overexpression promotes myofiber shrinkage.

    “Finally, key enzymes in ATP production such as pyruvate dehydrogenase kinase (PDK)4 have been recently reported to be induced in cancer, starvation, diabetes, and sepsis, and its overexpression promotes myofiber shrinkage while its inhibition blunts atrophy84.”

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Authors
Pin, F., Novinger, L. J., Huot, J. R., Harris, R. A., Couch, M. E., O'Connell, T. M., & Bonetto, A.
Affiliations
  • Indiana University Indianapolis (US)
  • Indiana University School of Medicine (US)
  • Indiana University-Purdue University Indianapolis Center for Cachexia Research, Innovation, and Therapy Indiana University School of Medicine Indianapolis Indiana USA
Corresponding author
Bonetto, Andrea
Venue
The FASEB Journal
Publisher
Wiley
Published
2019-03-20
Volume
33
Issue
6
Pages
7778-7790
ISSN
  • 0892-6638 (ISSN-L)
  • 1530-6860
OpenAlex
W2925166956
Cited by
81
References
65
Citations by year
2026: 10 · 2025: 12 · 2024: 10 · 2023: 12 · 2022: 16 · 2021: 10 · 2020: 8 · 2019: 3
FWCI
3.06
Type
journal article
Language
en
Open access
Locations
  • The FASEB Journal (publishedVersion)
  • PubMed Central (publishedVersion)
  • PubMed (publishedVersion)
  • IUScholarWorks (Indiana University) (submittedVersion, cc-by-nd)
Funders
  • Melvin and Bren Simon Cancer Center, Indiana University (P30CA082709)
  • Indiana University
  • V Foundation for Cancer Research (V2017-021)
  • American Cancer Society (132013-RSG-l8-010-01-CCG)
  • Indiana Clinical and Translational Sciences Institute
  • Ralph W. and Grace M. Showalter Research Trust Fund
Topics
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Molecular Biology › Muscle Physiology and Disorders
  • Health Sciences › Medicine › Physiology › Nutrition and Health in Aging
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Molecular Biology › Metabolism, Diabetes, and Cancer
Keywords
PDK4, pyruvate dehydrogenase kinase, cancer cachexia, skeletal muscle atrophy, protein degradation, mitochondrial abnormalities, colon 26 tumor, tumor microenvironment
MeSH terms
Pyruvate Dehydrogenase Acetyl-Transferring Kinase, Animals, Cachexia, Cell Line, Male, Mitochondria, Muscle, Muscular Atrophy, Neoplasms, Oxidation-Reduction, Muscle, Skeletal, Mice

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