Identification of novel transcription factors regulated by H3K27 acetylation in myogenic differentiation of porcine skeletal muscle satellite cells

H3K27 acetylation (H3K27ac) is crucial in muscle development as it regulates gene expression. Dysregulation of H3K27ac level has been linked to muscle-related diseases such as Duchenne muscular dystrophy, yet the mechanisms through which H3K27ac influences myogenic differentiation are not fully understood. Here, we utilized the SGC-CBP30 drug, a CBP/p300 bromodomain inhibitor, to reduce H3K27ac level and investigated its effect on myogenic differentiation of porcine skeletal muscle satellite cells. The results demonstrated an increased H3K27ac level during normal muscle satellite cell differentiation. We found that the addition of SGC-CBP30 resulted in a reduced level of H3K27ac based on ATAC-seq and CUT&Tag data. Our analysis revealed that a cluster characterized by reduced levels of H3K27ac and increased levels of H3K27me3 was enriched with motifs corresponding to Bach2, MafK, and Fosl2 transcription factors. Furthermore, knockdown of Bach2, MafK, and Fosl2 produced a similar suppression effect on myogenic differentiation. Taken together, our study contributes to a better understanding of how H3K27ac influences myogenic differentiation.