Cited by 54Muscle Physiology and DisordersPharmacological Effects of Natural CompoundsNutrition and Health in Aging

Glabridin Inhibits Dexamethasone-Induced Muscle Atrophy

Yoshioka, Yasukiyo, Kubota, Yusuke, Samukawa, Yumi, Yamashita, Yoko, Ashida, Hitoshi·2019·Archives of Biochemistry and Biophysics

Abstract

Prevention of muscle wasting is known to contribute to improving the quality of life and extending a healthy life. Recently, we have reported that licorice flavonoid oil containing glabridin, which is a prenylated isoflavone, enhances muscle mass in mice. In this study, we investigated the prevention effect of glabridin on dexamethasone-induced muscle atrophy and clarified its mechanism in cultured myotubes and in muscle of mice. Treatment with glabridin to C2C12 myotubes inhibited dexamethasone-induced protein degradation through dexamethasone-induced expression of ubiquitin ligases, MuRF1 and Cbl-b, but not atrogin-1. Mechanistically, glabridin inhibited nuclear translocation of the glucocorticoid receptor. Glabridin directly bound to the glucocorticoid receptor, resulting in the inhibition of binding between dexamethasone and the receptor protein. Glabridin also inhibited dexamethasone-induced phosphorylation of p38 and FoxO3a, as the upstream for the induction of ubiquitin ligases in C2C12 myotubes. Moreover, the glabridin-induced inhibition of protein degradation was eliminated by knockdown of the glucocorticoid receptor, but not by p38 knockdown. These data indicated that the inhibitory mechanism of glabridin against dexamethasone-induced muscle atrophy was mainly mediated by the inhibition of binding between dexamethasone and the glucocorticoid receptor in myotubes. Oral administration of glabridin prevented dexamethasone-induced protein degradation in the tibialis anterior muscle of mice. It was confirmed that glabridin inhibited dexamethasone-induced nuclear translocation of the glucocorticoid receptor and phosphorylation of FoxO3a in the muscle of mice. These findings suggest that glabridin is an effective food ingredient for the prevention of glucocorticoid-induced skeletal muscle atrophy.

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Crossref · 10.1016/j.abb.2019.02.006

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  • Glabridin inhibits dexamethasone-induced protein degradation via downregulating the expression of MuRF1 in C2C12 myotubes.

    “Glabridin, a major bioactivity compound in licorice derived from the dried roots and rhizomes of Glycyrrhiza genus plants and used in both foods and traditional herbal medicine, inhibits dexamethasone-induced protein degradation via downregulating the expression of MuRF1 in C2C12 myotubes [97].”

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Authors
Yoshioka, Y., Kubota, Y., Samukawa, Y., Yamashita, Y., & Ashida, H.
Affiliations
Kobe University (JP)
Corresponding author
Ashida, Hitoshi
Venue
Archives of Biochemistry and Biophysics
Publisher
Elsevier BV
Published
2019-03
Volume
664
Pages
157-166
ISSN
0003-9861 (ISSN-L)
OpenAlex
W2913663303
Cited by
54
References
50
Citations by year
2026: 3 · 2025: 8 · 2024: 12 · 2023: 11 · 2022: 5 · 2021: 6 · 2020: 8 · 2019: 1
FWCI
1.66
Type
journal article
Language
en
Open access
closed
Locations
  • Archives of Biochemistry and Biophysics (publishedVersion)
  • PubMed (publishedVersion)
Funders
  • Cross-ministerial Strategic Innovation Promotion Program
  • JSPS KAKENHI (17H00818)
Topics
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Molecular Biology › Muscle Physiology and Disorders
  • Life Sciences › Pharmacology, Toxicology and Pharmaceutics › Pharmacology › Pharmacological Effects of Natural Compounds
  • Health Sciences › Medicine › Physiology › Nutrition and Health in Aging
Keywords
glabridin, dexamethasone, muscle atrophy, glucocorticoid-induced muscle wasting, glucocorticoid receptor, ubiquitin ligase, MuRF1, Cbl-b, atrogin-1, protein degradation, p38 MAPK, FOXO3, licorice flavonoids, prenylated isoflavones, skeletal muscle, tibialis anterior, food ingredients
MeSH terms
Forkhead Box Protein O3, Animals, Cell Line, Dexamethasone, Isoflavones, Male, Mice, Inbred C57BL, Muscular Atrophy, Phenols, Receptors, Glucocorticoid, Signal Transduction, Muscle, Skeletal, p38 Mitogen-Activated Protein Kinases, Mice

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