文献类型： 外文期刊

作者： Du, W. ¹ ; Zhang, Y. ¹ ; Yang, J. Z. ² ; Li, H. B. ¹ ; Xia, J. ¹ ; Li, N. ¹ ; Zhang, J. S. ¹ ; Yan, X. M. ¹ ; Zhou, Z. Y. ¹ ;

作者机构： 1.Xinjiang Acad Anim Sci, Urumqi, Peoples R China

2.Univ Hawaii Manoa, Agr Lab, Honolulu, HI 96822 USA

关键词： MSTN;Propeptide;Real-time-PCR

期刊名称：GENETICS AND MOLECULAR RESEARCH （ 影响因子：0.764； 五年影响因子：0.912 ）

ISSN： 1676-5680

年卷期： 2016 年 15 卷 2 期

页码：

收录情况： SCI

摘要： Prokaryotic expression technology was used to express maltose-binding protein binding myostatin (MSTN) propeptide fusion protein. Six disease-free Altay lambs were used in this study. The right leg gastrocnemii were injected with MSTN recombinant propeptide protein. The left leg gastrocnemii (the control group) were injected with the same dose of phosphate based saline. The lambs were fed during four months under the same conditions and then slaughtered. Gastrocnemius samples were hematoxylin-eosin stained and the size of the muscle fibers was measured. A real-time polymerase chain reaction (RT-PCR) showed that single gastrocnemius cells in the experimental group had an average area of 1163.01 mu m(2), while it was 845.09 mu m(2) in the control group (P < 0.05). This indicates that the MSTN propeptide biological agents had an inhibitory effect on MSTN. In order to reveal its mechanism, RT-PCR was conducted to detect the expression of the differentiation-associated genes MyoD, Myf5, Myogenin, p21, and Smad3. The results showed that, in the MSTN propeptide biological agent injected group, expression levels of MSTN, Smad3, and p21 were lower than the control group, while Myf5, MyoD, and Myogenin were higher compared to the control group. This indicates that, when expression of the MSTN gene was inhibited, muscle cell differentiation and growth can be promoted by Smad3 up-regulated expression of Myf5, MyoD, and Myogenin.