Quantitative comparison of the expression of myogenic regulatory factors in flounder （Paralichthys olivaceus） embryos and adult tissues

• Published in: Chinese journal of oceanology and limnology Vol. 28; no. 2; pp. 248 - 253
• Main Author: ZHANG Yuqing TANXungang XU peng SUN Wei XU Yongli ZHANG Peijun
• Format: Journal Article
• Language: English
• Published: 2010
• Subjects: 体组织; 因子表; 早期胚胎发育; 生肌调节因子; 终末分化; 肌肉生长
• ISSN: 0254-4059; 1993-5005

MyoD, Myf5, and myogenin are myogenic regulatory factors that play important roles during myogenesis. It is thought that MyoD and Myf5 are required for myogenic determination, while myogenin is important for terminal differentiation and lineage maintenance. To better understand the function of myogenic regulatory factors in muscle development of flounder, an important economic fish in Asia, real-time quantitative RT-PCR was used to characterize the expression patterns of MyoD, Myf5, and myogenin at early stages of embryo development, and in different tissues of the adult flounder. The results show that, MyJ5 is the first gene to be expressed during the early stages of flounder development, followed by MyoD and myogenin. The expressions ofMyf5, MyoD, and myogenin at the early stages have a common characteristic： expression gradually increased to a peak level, and then gradually decreased to an extremely low level. In the adult flounder, the expression of the three genes in muscle is much higher than that in other tissues, indicating that they are important for muscle growth and maintenance of grown fish. During embryonic stages, the expression level of MyoD might serve an important role in the balance between muscle cell differentiation and proliferation. When the MyoD expression is over 30% of its highest level, the muscle cells enter the differentiation stage.