p38γ activity is required for maintenance of slow skeletal muscle size.

Journal Article (Journal Article)

INTRODUCTION: p38γ kinase is highly enriched in skeletal muscle and is implicated in myotube formation. However, the activation status of p38γ in muscle is unclear. METHODS: p38γ activity in slow and fast adult mouse skeletal muscle tissue was examined, as was the impact of p38γ deficiency on muscle development and gene expression. RESULTS: p38γ is preferentially activated in slow muscle, but it is inactive in fast muscle types. Furthermore, the loss of p38γ in mice led to decreased muscle mass associated with a smaller myofiber diameter in slow muscle, but there was no impact on fast muscle in either mass or myofiber diameter. Finally, p38γ-deficient muscle showed selective changes in genes related to muscle growth in slow muscle fibers. CONCLUSION: This study provides evidence that p38γ is selectively activated in slow skeletal muscle and is involved in the normal growth and development of a subset of skeletal muscle.

Full Text

Duke Authors

Cited Authors

  • Foster, WH; Tidball, JG; Wang, Y

Published Date

  • February 2012

Published In

Volume / Issue

  • 45 / 2

Start / End Page

  • 266 - 273

PubMed ID

  • 22246884

Pubmed Central ID

  • PMC3261497

Electronic International Standard Serial Number (EISSN)

  • 1097-4598

Digital Object Identifier (DOI)

  • 10.1002/mus.22289

Language

  • eng

Conference Location

  • United States