Estrogen Receptor ? Controls Muscle Growth and Regeneration in Young Female Mice.

ABSTRACT: Estrogens are female sex hormones that are important for comprehensively maintaining muscle function, and an insufficiency affects muscle strength and regeneration in females. However, it is still unclear whether estrogen signaling is mediated through receptors. To investigate the specific role of estrogen receptor ? (ER?) in skeletal muscle and satellite cells (muscle stem cells), we generated muscle-specific ER?-knockout (mKO) and satellite cell-specific ER?-knockout (scKO) mice, respectively. Young female mKO mice displayed a decrease in fast-type dominant muscle mass. Female, but not male, scKO mice exhibited impaired muscle regeneration following acute muscle injury, probably due to reduced proliferation and increased apoptosis of satellite cells. RNA-sequencing analysis revealed that loss of ER? in satellite cells altered gene expression of extracellular matrix components, including laminin and collagen. The results indicate that the estrogen-ER? pathway is a sex-specific regulatory mechanism that controls muscle growth and regeneration in female mice.

SUBMITTER: Seko D 

PROVIDER: S-EPMC7486216 | biostudies-literature | 2020 Sep

REPOSITORIES: biostudies-literature