Asian-Australasian Journal of Animal Sciences

Asian Australasian Association of Animal Production Societies (아세아태평양축산학회)
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Construction of fat1 Gene Expression Vector and Its Catalysis Efficiency in Bovine Fetal Fibroblast Cells

  • Liu, Boyang (College of Animal Science and Veterinary Medicine, and Jilin Provincial Key Laboratory of Animal Embryo Engineering, Jilin University) ;
  • Yang, Runjun (College of Animal Science and Veterinary Medicine, and Jilin Provincial Key Laboratory of Animal Embryo Engineering, Jilin University) ;
  • Li, Junya (Institute of Animal Sciences, Chinese Academy of Agricultural Sciences) ;
  • Zhang, Lupei (Institute of Animal Sciences, Chinese Academy of Agricultural Sciences) ;
  • Liu, Jing (College of Animal Science and Veterinary Medicine, and Jilin Provincial Key Laboratory of Animal Embryo Engineering, Jilin University) ;
  • Lu, Chunyan (College of Animal Science and Veterinary Medicine, and Jilin Provincial Key Laboratory of Animal Embryo Engineering, Jilin University) ;
  • Lian, Chuanjiang (College of Animal Science and Veterinary Medicine, and Jilin Provincial Key Laboratory of Animal Embryo Engineering, Jilin University) ;
  • Li, Zezhong (College of Animal Science and Veterinary Medicine, and Jilin Provincial Key Laboratory of Animal Embryo Engineering, Jilin University) ;
  • Zhang, Yong-Hong (College of Animal Science and Veterinary Medicine, and Jilin Provincial Key Laboratory of Animal Embryo Engineering, Jilin University) ;
  • Zhang, Liying (College of Animal Science and Veterinary Medicine, and Jilin Provincial Key Laboratory of Animal Embryo Engineering, Jilin University) ;
  • Zhao, Zhihui (College of Animal Science and Veterinary Medicine, and Jilin Provincial Key Laboratory of Animal Embryo Engineering, Jilin University)
  • Received : 2011.12.19
  • Accepted : 2012.02.21
  • Published : 2012.05.01
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Abstract

The FAT-1 protein is an n-3 fatty acid desaturase, which can recognize a range of 18- and 20-carbon n-6 substrates and transform n-6 polyunsaturated fatty acids (PUFAs) into n-3 PUFAs while n-3 PUFAs have beneficial effect on human health. Fat1 gene is the coding sequence from Caenorhabditis elegans which might play an important role on lipometabolism. To reveal the function of fat1 gene in bovine fetal fibroblast cells and gain the best cell nuclear donor for transgenic bovines, the codon of fat1 sequence was optimized based on the codon usage frequency preference of bovine muscle protein, and directionally cloned into the eukaryotic expression vector pEF-GFP. After identifying by restrictive enzyme digests with AatII/XbaI and sequencing, the fusion plasmid pEF-GFP-fat1 was identified successfully. The pEF-GFP-fat1 vector was transfected into bovine fetal fibroblast cells mediated by Lipofectamine2000$^{TM}$. The positive bovine fetal fibroblast cells were selected by G418 and detected by RT-PCR. The results showed that a 1,234 bp transcription was amplified by reverse transcription PCR and the positive transgenic fat1 cell line was successfully established. Then the expression level of fat1 gene in positive cells was detected using quantitative PCR, and the catalysis efficiency was detected by gas chromatography. The results demonstrated that the catalysis efficiency of fat1 was significantly high, which can improve the total PUFAs rich in EPA, DHA and DPA. Construction and expression of pEF-GFP-fat1 vector should be helpful for further understanding the mechanism of regulation of fat1 in vitro. It could also be the first step in the production of fat1 transgenic cattle.

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References

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