1. The Regulatory Role of Myomaker in the Muscle Growth of the Chinese Perch (Siniperca chuatsi).
- Author
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Zeng, Wei, Meng, Yangyang, Nie, Lingtao, Cheng, Congyi, Gao, Zexia, Liu, Lusha, Zhu, Xin, and Chu, Wuying
- Subjects
MUSCLE growth ,FISH growth ,SKELETAL muscle ,MUSCULAR hypertrophy ,MYOBLASTS - Abstract
Simple Summary: Myomaker has been reported to play an important role in regulating myoblast fusion. However, the role of Myomaker gene in skeletal muscle growth in economic fish during post-hatching stage is unclear. This study showed that the growth of Chinese perch was significantly decreased when Myomaker was inhibited by Myomaker-siRNA. Furthermore, both the diameter of muscle fibers and the number of nuclei in single muscle fibers were significantly reduced in the Myomaker-siRNA group, whereas, there was no significant difference in the number of proliferating cells between the control and Myomaker-siRNA groups. Together, these findings indicate that Myomaker may promote the hypertrophy of muscle fibers and growth of fast muscle in Chinese perch by promoting myoblast fusion. The fusion of myoblasts is a crucial stage in the growth and development of skeletal muscle. Myomaker is an important myoblast fusion factor that plays a crucial role in regulating myoblast fusion. However, the function of Myomaker in economic fish during posthatching has been poorly studied. In this study, we found that the expression of Myomaker in the fast muscle of Chinese perch (Siniperca chuatsi) was higher than that in other tissues. To determine the function of Myomaker in fast muscle, Myomaker-siRNA was used to knockdown Myomaker in Chinese perch and the effect on muscle growth was determined. The results showed that the growth of Chinese perch was significantly decreased in the Myomaker-siRNA group. Furthermore, both the diameter of muscle fibers and the number of nuclei in single muscle fibers were significantly reduced in the Myomaker-siRNA group, whereas there was no significant difference in the number of BrdU-positive cells (proliferating cells) between the control and the Myomaker-siRNA groups. Together, these findings indicate that Myomaker may regulate growth of fast muscle in Chinese perch juveniles by promoting myoblast fusion rather than proliferation. [ABSTRACT FROM AUTHOR]
- Published
- 2024
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