生肌调节因子在绵羊不同胎儿期心肌和骨骼肌中的表达

doi:10.16431/j.cnki.1671-7236.2020.10.010

Abstract

Abstract: The topic of this research was to investigate the expression pattern of myogenic regulatory factors (MRFs) in the myocardium and skeletal muscle of sheep at different fetal stages,the fetuses of Tan sheep at 60 (E60),70 (E70),80 (E80) and 90 days (E90) of gestation were selected as the research objects,and the myocardium and skeletal muscle were collected.The histogenesis of myocardium and skeletal muscle during fetal development were observed by HE and oil red staining.The expression patterns of MRFs in myocardium and skeletal muscle during fetal development and the expression differences of MRFs between myocardium and skeletal muscle at the same stage were tested by Real-time quantitative PCR.The results of HE staining showed that the microstructure of myocardium and skeletal muscle was very different,myocardial fibers crisscross into a network with high density,which were more mature;the density of skeletal muscle fibers were low with large gaps,the number of fibers from E60 to E90 increased gradually,and the structure fiber bundles was very clear.The results of oil red staining showed that there were no fat droplets stained red in myocardium and skeletal muscle tissues,which means that these two tissues form E60 to E90 did not have fat differentiation.The results of Real-time quantitative PCR showed that the expression of MYOG,Myf5 and Myf6 genes in myocardium decreased continuously from E60 to E90 day,but there was no MYOD gene expression.The expression of MYOD,MYOG and Myf6 genes in skeletal muscle from E60 to E90 increased gradually,among which the level of MYOG gene was the highest,and the expression of Myf5 gene fluctuated periodically.The above results indicated that the skeletal muscle was at the stage of rapid development from E60 to E90,however,the myocardial tissue had been roughly formed,which led to the expression of MRFs in skeletal muscle tissue was much higher than that in myocardial tissue,and MYOG gene played an important role in maintaining the rapid development of skeletal muscle.

Key words: myogenic regulatory factors; myocardium; skeletal muscle; fetal development

CLC Number:

Q786

HAN Jiangang, GUAN Weijun, HE Xiaohong, PU Yabin, ZHAO Qianjun, JIANG Lin, MA Yuehui. Expression of Myogenic Regulatory Factors in Myocardium and Skeletal Muscle at Different Fetal Stages[J]. China Animal Husbandry and Veterinary Medicine, 2020, 47(10): 3123-3131.

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Expression of Myogenic Regulatory Factors in Myocardium and Skeletal Muscle at Different Fetal Stages

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