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Zhang, Zhen; Fan, Yixuan; Deng, Kaiping; Liang, Yaxu; Zhang, Guomin; Gao, Xiaoxiao; El‐Samahy, M. A.; Zhang, Yanli; Deng, Mingtian; Wang, Feng
The FASEB journal, January 2022, 2022-01-00, 20220101, Volume: 36, Issue: 1Journal Article
Circular RNAs (circRNAs) are an indispensable element of post‐transcriptional gene regulation, influencing a variety of biological processes including myogenic differentiation; however, little is known about the function of circRNA in goat myogenic differentiation. Using RNA‐sequencing data from our laboratory, we explored the influences of circUSP13, as a candidate circRNA, on myoblast differentiation since its expression is higher in myoblasts of lamb (first day of age) than that of the fetus (75th day of pregnancy). In in vitro experiments, circUSP13 significantly promoted differentiation and inhibited apoptosis in goat primary myoblasts. Mechanistically, circUSP13 localized with miR‐29c in the cytoplasm of goat myoblasts to regulate IGF1 expression. We further demonstrated that circUSP13 sponges miR‐29c, promoting IGF1 expression that upregulated the expression of MyoG and MyHC. Thus, our results identified circUSP13 as a molecular marker for breeding programs of mutton production, as well as the circUSP13‐miR‐29c‐IGF1 axis as a potential therapeutic target for combating muscle wasting.
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