ACTA VETERINARIA ET ZOOTECHNICA SINICA ›› 2015, Vol. 46 ›› Issue (3): 430-437.doi: 10.11843/j.issn.0366-6964.2015.03.012

Previous Articles     Next Articles

Prokaryotic Expression of Antigenic Domain Region of Duck Enteritis Virus gB Gene and Reactivity of Its Polyclonal Antibody

ZHANG Shu-dong1,CAO Chun-qiu1,DONG Jing-quan1,GAO Ming-chun1,ZHANG Wen-long1,ZHENG Tie-xin2,MA Bo1*,WANG Jun-wei1*   

  1. (1.College of Veterinary Medicine,Northeast Agricultural University,Harbin 150030,China;2.Harbin Pharmaceutical Group Bio-vaccine Co.,Ltd.,Harbin 150069,China)
  • Received:2014-06-18 Online:2015-03-23 Published:2015-03-23

Abstract:

This experiment was conducted to prepare the antiserum of antigenic domain region of duck enteritis virus (DEV) gB gene,and showed its initial application as detection reagent to detect DEV.Specific primers were designed for DEV C-KCE ul27 gene according to the cloned gene sequence of our laboratory,then the antigenic domain region of DEV gB gene (331-570 bp)was cloned by PCR which named gB-AD.Recombinant gB-AD region protein was expressed in prokaryotic expression system,pET-32a(+) / Rosetta(DE3)pLysS,by induction of IPTG and was purified by Ni-NTA column affinity chromatography,and the antigenicity of recombinant protein was identified by using the DEV positive serum.The purified recombinant protein was retrieved by cutting the gel slices that contain the right bands,and was used to immunize rabbits as immunogen to prepare the rabbit anti-gB-AD region serum.Results were as follows:The recombinant protein could be identified by DEV positive serum specifically,and the titer of polyclonal antibody for immunizing rabbit was 1∶10 240 by I-ELISA with neutralizing activity.The quality of the DEV gB molecule was about 66 kD reacted to polyclonal antibody in the reducing SDS-PAGE,on the contrary,it was about 120 and 66 kD in the non-reducing SDS-PAGE.I-ELISA and Western blot analysis showed that antibody for immunizing rabbit could identify recombinant gB-AD region protein from the infected cells respectively.In the further,indirect immunofluorescence test and neutralization assay confirmed that the antiserum could identify DEV specifically with neutralization.Above all,the results showed that antiserum for immunizing rabbit can be used as detection reagent to detect DEV,and it afforded significant data for the study on the detection of DEV and function of DEV gB.

CLC Number: