腺病毒介导shRNA干扰绵羊MSTN基因效果及对生肌调节因子和干扰素反应基因表达的影响
[Abstract]:The aim of this study was to further reveal the regulatory mechanism of MSTN in sheep myoblast and to prepare a tool for inactivating the MSTN gene effectively, and to provide a method and theoretical basis for increasing the meat yield of sheep by RNA interference technique. In this study, sheep myoblasts were used as experimental materials to construct shRNA interference plasmid vector specifically targeting sheep MSTN gene. The plasmid with good interference effect was further packaged as recombinant adenovirus. After transfection, the expression of MSTN gene, myogenic regulatory factor and interferon response gene were detected by qRT-PCR and Western blot. The results showed that the interference efficiency of plasmid ShR218 and ShR511 reached 35% and 48%, respectively, and the interference efficiency of plasmid ShR3 4 reached 85%. The shRNA recombinant adenovirus vectors Sh511 and Sh3 4 were successfully packaged. The viral titer reached 1 脳 10 ~ (8) pfu mL~ (-1). The infection efficiency of myoblasts was over 90%. Sh511 and Sh3 4 inhibited the mRNA expression of MSTN gene by 53% and 76%, respectively. After 55% and 64%.MSTN gene silencing, The mRNA level of Myf5,MyoD,MyoG,Myf6 gene was significantly down-regulated (P0.01), but only the level of MyoG protein was significantly increased (P0.01), but no significant change of Myf5,MyoD,Myf6 protein level was caused by adenovirus infection of myoblast, but no significant change of mRNA level of OAS1 gene was found in adenovirus infected myoblasts. However, the mRNA level of IFNGR1 gene was significantly increased (P0.01), but had no significant effect on both protein levels. In this study, shRNA adenovirus vector targeting MSTN gene was successfully constructed, which can effectively inhibit the expression of mRNA and protein in myoblasts MSTN, and affect the expression of Myf5,MyoD,MyoG,Myf6 gene and IFN- receptor gene IFNGR1.
【作者单位】: 河北农业大学动物科技学院;河北省畜牧兽医研究所;
【基金】:国家肉羊产业技术体系资助项目(CARS-39)
【分类号】:S826
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