Biotechnology Bulletin ›› 2019, Vol. 35 ›› Issue (5): 85-92.doi: 10.13560/j.cnki.biotech.bull.1985.2018-0877

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Preparation of Recombinant Human SOD1/3 Transgenic Goat and Detection of Expressed Products

ZHOU Min-ya1, LU Rui1, ZHANG Ting1, YUAN Ting-ting2, LU Yao-yao2, YAN Kun-ning2, YUAN Yu-guo1, CHENG Yong1   

  1. 1.College of Veterinary Medicine Yangzhou University,Yangzhou 225009;
    2.College of Medicine Yangzhou University,Yangzhou 225009
  • Received:2018-10-14 Online:2019-05-26 Published:2019-05-23

Abstract: In this study,we employed human SOD1(hSOD1)and SOD3(hSOD3)as encoding sequence along with goat beta-casein/CMV chimeric promoter to construct mammary gland-specific expression vectors rhSOD1 and rhSOD3,which then co-transfected goat fetal fibroblast cells. PCR and sequence analysis of the amplified products were applied to screen and obtain the SOD1/3 cloned lines,and somatic cell nuclear transfer(SCNT)was used to prepare bitransgenic goat. Whether or not successful integration of foreign genes in newborn goats was verified by PCR and sequence analysis of amplification product,and the expressed product was analyzed by Western blotting,ELISA and in vitro activity test. The results were as such:6 SOD1/3 transgenic goat fetal fibroblast cell lines were obtained,one original bitransgenic goat(♀)was prepared,rhSOD1 and rhSOD3 were detected in the milk from the transgenic goats,and their concentrations were 88.81± 8.36 mg/L and 267.82± 12.67 mg/L,respectively. The biological activity of recombinant human SOD in the goat milk was 1 432±1 57 U/mL. This study implies that two expression vectors and single marker gene can simultaneously transfect goat fetal fibroblast cells to obtain the transgenic cell line with double gene integration,the SOD1 and SOD3 functional genes may co-express in the mammary gland,and the expressed products show fine biological activity.

Key words: rhSODs, mammary gland specific expression, transgenic goat, co-expression