Cited by 131Muscle Physiology and DisordersCongenital heart defects researchGenomics and Chromatin Dynamics

P38-γ–dependent gene silencing restricts entry into the myogenic differentiation program

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Gillespie, Mark A., Le Grand, Fabien, Scimè, Anthony, Kuang, Shihuan, von Maltzahn, Julia, Seale, Vanessa, Cuenda, Ana, Ranish, Jeffrey A. +1 more·2009·Journal of Cell Biology

Abstract

The mitogen-activated protein kinase p38-gamma is highly expressed in skeletal muscle and is associated with the dystrophin glycoprotein complex; however, its function remains unclear. After induced damage, muscle in mice lacking p38-gamma generated significantly fewer myofibers than wild-type muscle. Notably, p38-gamma-deficient muscle contained 50% fewer satellite cells that exhibited premature Myogenin expression and markedly reduced proliferation. We determined that p38-gamma directly phosphorylated MyoD on Ser199 and Ser200, which results in enhanced occupancy of MyoD on the promoter of myogenin together with markedly decreased transcriptional activity. This repression is associated with extensive methylation of histone H3K9 together with recruitment of the KMT1A methyltransferase to the myogenin promoter. Notably, a MyoD S199A/S200A mutant exhibits markedly reduced binding to KMT1A. Therefore, p38-gamma signaling directly induces the assembly of a repressive MyoD transcriptional complex. Together, these results establish a hitherto unappreciated and essential role for p38-gamma signaling in positively regulating the expansion of transient amplifying myogenic precursor cells during muscle growth and regeneration.

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  • The γ isoform of p38 can modulate myogenesis by repressing transcriptional activity of MyoD, promoting proliferation.

    “The γ isoform of p38 can also modulate myogenesis by repressing the transcriptional activity of MyoD promoting proliferation [136] although it is unknown whether EPA and DHA alter the activation of p38 MAPK in the context of myogenesis.”

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Authors
Gillespie, M. A., Le Grand, F., Scimè, A., Kuang, S., von Maltzahn, J., Seale, V., Cuenda, A., Ranish, J. A., & Rudnicki, M. A.
Affiliations
  • University of Ottawa (CA)
  • The Sprott Centre for Stem Cell Research, Regenerative Medicine Program, Ottawa Health Research Institute, Ottawa, Ontario K1H 8L6, Canada 1
  • Consejo Superior de Investigaciones Científicas (ES)
  • Institute for Systems Biology (US)
Corresponding author
Rudnicki, Michael A.
Venue
Journal of Cell Biology
Published
2009-12-21
Volume
187
Issue
7
Pages
991-1005
ISSN
  • 0021-9525 (ISSN-L)
  • 1540-8140
OpenAlex
W2136285175
Cited by
131
References
80
Citations by year
2026: 2 · 2025: 6 · 2024: 5 · 2023: 8 · 2022: 7 · 2021: 5 · 2020: 7 · 2019: 4 · 2018: 9 · 2017: 10 · 2016: 11 · 2015: 7 · 2014: 5 · 2013: 6 · 2012: 14
FWCI
5.23
Type
journal article
Language
en
Open access
Licence
cc-by-nc-sa
Locations
  • The Journal of Cell Biology (publishedVersion, cc-by-nc-sa)
  • PubMed Central (publishedVersion, cc-by-nc-sa)
  • PubMed (publishedVersion)
Funders
Canadian Institutes of Health Research (MOP12080)
Topics
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Molecular Biology › Muscle Physiology and Disorders
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Molecular Biology › Congenital heart defects research
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Molecular Biology › Genomics and Chromatin Dynamics
Keywords
myogenesis, gene silencing, histone H3 lysine 9 methylation, satellite cells, muscle regeneration, muscle growth, myogenic precursor cells, dystrophin-glycoprotein complex, skeletal muscle
MeSH terms
Animals, Cell Differentiation, Cell Line, Gene Expression Regulation, Histones, Mice, Inbred C57BL, Phosphorylation, Promoter Regions, Genetic, Regeneration, Transcription, Genetic, Signal Transduction, MyoD Protein, Myogenin, Muscle, Skeletal, Gene Silencing, Muscle Development, Epigenesis, Genetic, Mitogen-Activated Protein Kinase 12, Cell Proliferation, Mice

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