Sex differences in skeletal muscle size, function, and myosin heavy chain isoform expression during post-injury regeneration in mice.

ABSTRACT: Skeletal muscle regeneration is an essential process to restore muscle function after injury and is influenced by various factors. Despite the known importance of sex hormones in muscle regeneration, whether and what sex difference exists in this process is still unclear. In this study, we provide evidence for a clear sex difference in muscle regeneration in mice. At 7 and 14 days after barium chloride-induced muscle injury, female mice showed a faster recovery of muscle fiber size than males. Consistently, muscle force in female mice was restored faster than in males after injury, and this functional difference was maintained at 14 months of age when regenerative capacity declined. Myosin heavy chain isoform profiling and fatigability test revealed dynamic remodeling of myosin heavy chain

SUBMITTER: You JS 

PROVIDER: S-EPMC10449603 | biostudies-literature | 2023 Aug

REPOSITORIES: biostudies-literature