Cited by 46Muscle Physiology and DisordersFlavonoids in Medical ResearchExercise and Physiological Responses

Flavones Inhibit LPS-Induced Atrogin-1/MAFbx Expression in Mouse C2C12 Skeletal Myotubes

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SHIOTA, Chieko, ABE, Tomoki, KAWAI, Nobuhiko, OHNO, Ayako, TESHIMA-KONDO, Shigetada, MORI, Hiroyo, TERAO, Junji, TANAKA, Eiji +1 more·2015·Journal of Nutritional Science and Vitaminology

Abstract

Muscle atrophy is a complex process that occurs as a consequence of various stress events. Muscle atrophy-associated genes (atrogenes) such as atrogin-1/MAFbx and MuRF-1 are induced early in the atrophy process, and the increase in their expression precedes the loss of muscle weight. Although antioxidative nutrients suppress atrogene expression in skeletal muscle cells, the inhibitory effects of flavonoids on inflammation-induced atrogin-1/MAFbx expression have not been clarified. Here, we investigated the inhibitory effects of flavonoids on lipopolysaccharide (LPS)-induced atrogin-1/MAFbx expression. We examined whether nine flavonoids belonging to six flavonoid categories inhibited atrogin-1/MAFbx expression in mouse C2C12 myotubes. Two major flavones, apigenin and luteolin, displayed potent inhibitory effects on atrogin-1/MAFbx expression. The pretreatment with apigenin and luteolin significantly prevented the decrease in C2C12 myotube diameter caused by LPS stimulation. Importantly, the pretreatment of LPS-stimulated myoblasts with these flavones significantly inhibited LPS-induced JNK phosphorylation in C2C12 myotubes, resulting in the significant suppression of atrogin-1/MAFbx promoter activity. These results suggest that apigenin and luteolin, prevent LPS-mediated atrogin-1/MAFbx expression through the inhibition of the JNK signaling pathway in C2C12 myotubes. Thus, these flavones, apigenin and luteolin, may be promising agents to prevent LPS-induced muscle atrophy.

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Authors
SHIOTA, C., ABE, T., KAWAI, N., OHNO, A., TESHIMA-KONDO, S., MORI, H., TERAO, J., TANAKA, E., & NIKAWA, T.
Affiliations
Tokushima University (JP)
Venue
Journal of Nutritional Science and Vitaminology
Published
2015
Volume
61
Issue
2
Pages
188-194
ISSN
  • 0301-4800 (ISSN-L)
  • 1881-7742
OpenAlex
W1884746705
Cited by
46
References
39
Citations by year
2026: 2 · 2025: 5 · 2024: 3 · 2023: 6 · 2022: 4 · 2021: 4 · 2020: 4 · 2019: 5 · 2018: 3 · 2017: 3 · 2016: 5 · 2015: 2
FWCI
1.88
Type
journal article
Language
en
Open access
Locations
  • Journal of Nutritional Science and Vitaminology (publishedVersion)
  • PubMed (publishedVersion)
  • Institutional Repositories DataBase (IRDB) (submittedVersion)
Topics
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Molecular Biology › Muscle Physiology and Disorders
  • Health Sciences › Medicine › Pharmacology › Flavonoids in Medical Research
  • Health Sciences › Medicine › Rehabilitation › Exercise and Physiological Responses
Keywords
flavonoids, atrogin-1/MAFbx, muscle atrophy, lipopolysaccharide, apigenin, luteolin, JNK signaling, skeletal muscle, C2C12 myotubes, atrogenes, inflammation, myotube diameter
MeSH terms
Animals, Cell Line, Inflammation, Phytotherapy, Muscle Proteins, Muscular Atrophy, Phosphorylation, Plant Extracts, Signal Transduction, Muscle, Skeletal, Muscle Fibers, Skeletal, MAP Kinase Signaling System, SKP Cullin F-Box Protein Ligases, Flavones, Apigenin, Luteolin, Mice

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