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miR-423-5p inhibits myoblast proliferation and differentiation by targeting Sufu.

J. Cell. Biochem.2018 Sep;119(9):7610-7620. doi:10.1002/jcb.27103. Epub 2018 Jun 20
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摘要


Myoblast proliferation and terminal differentiation are the key steps of myogenesis. MicroRNAs are a class of small noncoding RNAs that play important roles in gene expression regulation. They negatively regulate gene expression by causing messenger RNA translational repression or target messenger RNA degradation. Here, we found that microRNA-423-5p (miR-423-5p) is highly expressed in both slow and fast muscles. Our gain-of-function study indicated that miR-423-5p actually plays a negative role in regulating myoblast proliferation and differentiation. We also found that miR-423-5p is able to inhibit the expression of suppressor of fused homolog to inactivate the expression of the marker genes in myoblast proliferation and differentiation. Taken together, our findings indicated miR-423-5p as a potential inhibitor of myogenesis by targeting suppressor of fused homolog in myoblast, and it also contributes to a better understanding of the microRNAs-target gene regulatory network in different types of porcine muscle types and may benefit the practice of improving the meat quality in animal husbandry.

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