Cited by 683Muscle Physiology and DisordersUbiquitin and proteasome pathwaysMuscle metabolism and nutrition

The E3 Ligase MuRF1 Degrades Myosin Heavy Chain Protein in Dexamethasone-Treated Skeletal Muscle

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Clarke, Brian A., Drujan, Doreen, Willis, Monte S., Murphy, Leon O., Corpina, Richard A., Burova, Elena, Rakhilin, Sergey V., Stitt, Trevor N. +3 more·2007·Cell Metabolism

Abstract

Skeletal muscle atrophy occurs as a side effect of treatment with synthetic glucocorticoids such as dexamethasone (DEX) and is a hallmark of cachectic syndromes associated with increased cortisol levels. The E3 ubiquitin ligase MuRF1 (muscle RING finger protein 1) is transcriptionally upregulated by DEX treatment. Differentiated myotubes treated with DEX undergo depletion of myosin heavy chain protein (MYH), which physically associates with MuRF1. This loss of MYH can be blocked by inhibition of MuRF1 expression. When wild-type and MuRF1(-/-) mice are treated with DEX, the MuRF1(-/-) animals exhibit a relative sparing of MYH. In vitro, MuRF1 is shown to function as an E3 ubiquitin ligase for MYH. These data identify the mechanism by which MYH is depleted under atrophy conditions and demonstrate that inhibition of a single E3 ligase, MuRF1, is sufficient to maintain this important sarcomeric protein.

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Crossref · 10.1016/j.cmet.2007.09.009

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Authors
Clarke, B. A., Drujan, D., Willis, M. S., Murphy, L. O., Corpina, R. A., Burova, E., Rakhilin, S. V., Stitt, T. N., Patterson, C., Latres, E., & Glass, D. J.
Affiliations
  • University of North Carolina at Chapel Hill (US)
  • Regeneron (United States) (US)
Corresponding author
Glass, David J.
Venue
Cell Metabolism
Publisher
Elsevier BV
Published
2007-11
Volume
6
Issue
5
Pages
376-385
ISSN
1550-4131 (ISSN-L)
OpenAlex
W2061929833
Cited by
683
References
35
Citations by year
2026: 28 · 2025: 27 · 2024: 25 · 2023: 25 · 2022: 38 · 2021: 31 · 2020: 47 · 2019: 39 · 2018: 34 · 2017: 37 · 2016: 36 · 2015: 39 · 2014: 48 · 2013: 50 · 2012: 47
FWCI
11.80
Type
journal article
Language
en
Open access
Locations
  • Cell Metabolism (publishedVersion)
  • PubMed (publishedVersion)
  • Carolina Digital Repository (University of North Carolina at Chapel Hill) (submittedVersion)
  • UNC Libraries
Topics
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Molecular Biology › Muscle Physiology and Disorders
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Molecular Biology › Ubiquitin and proteasome pathways
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Cell Biology › Muscle metabolism and nutrition
Keywords
MuRF1, E3 ubiquitin ligase, myosin heavy chain, skeletal muscle atrophy, dexamethasone, glucocorticoids, ubiquitination, sarcomeric proteins, cachexia
MeSH terms
Tripartite Motif Proteins, Animals, Cell Line, Dexamethasone, Glucocorticoids, Leupeptins, Muscle Proteins, Oligopeptides, Protein Binding, Blotting, Western, Gene Expression, Mice, Knockout, Muscle, Skeletal, Myosin Heavy Chains, Protein Isoforms, RNA Interference, Ubiquitin-Protein Ligases, Proteasome Endopeptidase Complex, Mice, Ubiquitination, Proteasome Inhibitors

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