The Ubiquitin-Proteasome System Is Indispensable for the Maintenance of Muscle Stem Cells.

ABSTRACT: Adult muscle stem cells (satellite cells) are required for adult skeletal muscle regeneration. A proper balance between quiescence, proliferation, and differentiation is essential for the maintenance of the satellite cell pool and their regenerative function. Although the ubiquitin-proteasome is required for most protein degradation in mammalian cells, how its dysfunction affects tissue stem cells remains unclear. Here, we investigated the function of the proteasome in satellite cells using mice lacking the crucial proteasomal component, Rpt3. Ablation of Rpt3 in satellite cells decreased proteasome activity. Proteasome dysfunction in Rpt3-deficient satellite cells impaired their ability to proliferate, survive and differentiate, resulting in defective muscle regeneration. We found that in

SUBMITTER: Kitajima Y 

PROVIDER: S-EPMC6294073 | biostudies-literature | 2018 Dec

REPOSITORIES: biostudies-literature