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Construction and Detection of the RNA Interference Vector Mediated by Lentiviral to Knockdown Goat myostatin Gene

LU Jian1,2, ZHANG Shi-fang2, ZHANG Xiao-ning2, LIU Jia-sen2,3, LI Bi-chun1, ZHAO Fu-ping2, ZHANG Li2, WEI Cai-hong2, DU Li-xin2   

  1. 1. College of Animal Science and Technology, Yangzhou University, Yangzhou 225009, China;
    2. National Center for Molecular Genetics and Breeding of Animal, Institute of Animal Sciences, Chinese Academy of Agricultural Sciences, Beijing 100193, China;
    3. Institute of Animal Science, Inner Mongolia Academy of Agricultural & Animal Husbandry Sciences, Hohhot 010031, China
  • Received:2012-06-29 Online:2012-09-20 Published:2012-09-18

Abstract: Myostatin gene was an important regulator of muscle growth and development, and the gene mutation or inactivation of the species also displayed the double muscle phenotype of the skeletal hypermuscular, suggesting that modulating myostatin gene expression may allow for increased meat production of livestock. To explore the biological function of myostatin in goat fetal fibroblast and generate the inactivation tool of myostatin, we had cloned the potent targeted site of myostatin into the transfer vector of the lentiviral RNA interference system, constructed the lentiviral mediated RNA interference vector to knockdown myostatin and detected the knockdown efficiency. The results demonstrated that the sequences of RNA interference had been inserted into the transfer vector rightly, and we had constructed the RNA interference of myostatin gene mediated by the lentiviral vector successfully. In addition, we obtained the lentiviral particles by co-transfected of the three plasmids into 293T cells could be transfected into goat fetal fibroblasts with high effective. The results of Real-time PCR demonstrated that the lentiviral vector Lv322 had reduced the myostatin mRNA by 75% (P<0.01), and Western blotting also demonstrated that the protein level of myostatin had been decreased by 94% (P<0.01). The results would provide the important foundation and effective tool to detect the function of myostatin and to generate the inactivation of transgenic animal in the future.

Key words: myostatin gene; goat fetal fibroblasts; lentiviral vector; RNA interference

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