Role of microRNA-101a in the regulation of goat skeletal muscle satellite cell proliferation and differentiation.

MicroRNAs are a class of small, non-coding RNAs that participate in the regulation of diverse biological processes including skeletal muscle development. However, the underlying molecular mechanisms are not fully understood, particularly in goat. Here, we identified goat miR-101a as a novel myogenic microRNA mediating myogenic differentiation. The expression of miR-101a was enriched in goat skeletal muscles and up-regulated during satellite cell differentiation. After transfection with a miR-101a mimic and culturing in differentiation medium, satellite cell differentiation was promoted, accompanied by a significant increase in mRNA expression of the myogenic marker, MyoG, and decreased expression of MyoD. In contrast, blocking the function of miR-101a with a 2'-O-methylated antisense oligonucleotide inhibitor repressed satellite cell differentiation. However, both gain- and loss-of-function studies demonstrated that miR-101a had no significant influence on satellite cell proliferation. Therefore, our results provide a new insight on miR-101a in the regulation of goat skeletal muscle satellite cell proliferation and differentiation.