Non-muscle myosin IIC predominantly expressed in the slow-twitch skeletal muscles impedes age-related muscle weakness.

ABSTRACT: Skeletal muscle expresses three types of non-muscle myosin (NM) II in addition to skeletal type myosin. While immature myoblasts have been reported to express NMIIA and NMIIB, playing roles in cell morphology, the specific localization and function of NMIIC in skeletal muscle cells remain unclear. In this study, we aimed to investigate the expression pattern and the physiological role of NMIIC in skeletal muscle. NMIIC was specifically expressed in the slow-twitch muscles such as soleus, which primarily consists of type I and type IIa fibers, and its expression increased as muscle differentiation progressed. To explore the function of NMIIC in skeletal muscle, we used whole-body NMIIC knockout (KO) mice. Myofiber size was slightly but significantly decreased in the soleus of young (18-20-w

SUBMITTER: Hamaguchi H 

PROVIDER: S-EPMC12677458 | biostudies-literature | 2025

REPOSITORIES: biostudies-literature