Sugt1 loss in skeletal muscle stem cells impairs muscle regeneration and causes premature muscle aging.

ABSTRACT: Adult skeletal muscle stem cells (MuSCs) are essential for muscle homeostasis and regeneration. During aging, the number of MuSCs and their regenerative capacity gradually decline but the underlying mechanisms remain elusive. Here, we identify Sugt1 (suppressor of G2 allele of SKP1 homolog), which is a chaperone for kinetochore function during mitosis and is essential for muscle regeneration by regulating MuSC proliferation. Sugt1 expression level is low in quiescent MuSCs but highly induced when the cells become activated and expand as proliferating myoblasts. Inducible inactivation of Sugt1 in MuSCs causes impaired muscle regeneration upon acute injury by impairing MuSC proliferation. Furthermore, loss of Sugt1 leads to cell cycle arrest in the G2/M phase and cellular senescence. Moreove

SUBMITTER: He Z 

PROVIDER: S-EPMC11749260 | biostudies-literature | 2023 Aug

REPOSITORIES: biostudies-literature