Japan Society for the Promotion of Science:Grants-in-Aid for Scientific Research
Date (from‐to) : 2019/04 -2022/03
Author : Nedachi Taku
The purpose of this study was to focus on exosomes, which are a type of EVs, and to clarify how exosomes secreted by skeletal muscle are regulated by exercise. Initially, we applied electrical pulse stimulation (EPS) to C2C12 myotubes to induce cell contraction, and exosomes secreted into the culture supernatant were analyzed. RNA-seq analysis revealed numerous types of miRNAs are present in exosomes, and some miRNAs are fluctuated by EPS. Some of these miRNAs have been reported to target muscle differentiation-related genes, suggesting that exercise-dependently released exosomes may be involved in muscle differentiation. In fact, we found that exosomes secreted from EPS-treated C2C12 myotube cells regulate the expression of differentiation-related genes in myoblasts. Overall, it can be speculated that exercise promotes qualitative changes in released exosomes from skeletal muscles, especially changes in the encapsulated miRNA profile, thereby controlling muscle differentiation.