Guanidineacetic acid regulate myogenic differentiation through miR-133a-5 and miR-1a-3p co-mediated PI3K-Akt-mTOR signaling pathway

Through small RNA sequencing, we finded that a total of 8 miRNAs, including miR-133a-3p and miR-1a-3p cluster, showed differential expression after guanidineacetic acid supplement. To further study the function of miR-133a-3p and miR-1a-3p in guanidineacetic acid induce myotube hypertrophy, we transfected miR-133a-3p and miR-1a-3p mimics, that also induce myotube hypertrophy. Through bioinformatics and dual-luciferase reporter system, the target gene of miR-133a-3p and miR-1a-3p were respectively determined. Meanwhile, miR-133a-3p and miR-1a-3p modulate PI3K-Akt-mTOR signaling pathway by restraining target gene expression. Overall design: We used small RNA sequencing to detect miRNA transcriptomes of myotubes after 20 mM guanidineacetic acid treatment (GAA) or nagtive control(NC) (2 vs. 2).