Regulating the regulators: understanding miRNA biogenesis and decay in adult skeletal muscles.

Maintaining cellular homeostasis necessitates precise control of gene expression, a process that molds both the transcriptome and proteome to adapt to internal and external changes effectively. MicroRNAs (miRNAs) are small RNAs (~ 22nucleotides) belonging to a broad family of non-coding RNAs and are important regulators of gene expression. While numerous studies have advanced our understanding of the common processes underlying miRNA biogenesis and function, individual cell types in diverse organisms have evolved distinct mechanisms for regulating them. In this current issue, Satoshi Oikawa and colleagues delve into the molecular dynamics of miRNAs in adult skeletal muscles. Their research introduces intriguing new inquiries for further investigations to uncover alternative mechanisms of miRNA biogenesis in skeletal muscle.