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Development and neutralization analysis of recombinant BVDVs expressing a CSF single chain antibody in vitro

文献类型： 外文期刊

作者： Tao, Jie 1 ; Li, Benqiang 1 ; Cheng, Jinghua 1 ; Shi, Ying 1 ; Shen, Xiaohui 1 ; Liu, Huili 1 ;

作者机构： 1.Shanghai Acad Agr Sci, Inst Anim Sci & Vet Med, BeiDi Rd,2901, Shanghai, Peoples R China

2.Shanghai Key Lab Agr Genet Breeding, Shanghai 201106, Peoples R China

3.Shanghai Engn Res Ctr Pig Breeding, Shanghai 201302, Peoples R China

关键词： CSFV; Single-chain fragment variable; Recombinant BVDVs; Neutralization; Antibody vaccine

期刊名称：BIOLOGICALS （ 影响因子：1.801； 五年影响因子：1.922 ）

ISSN： 1045-1056

年卷期： 2021 年 70 卷

页码：

收录情况： SCI

摘要： Although the immunization against swine fever (SF) is compulsory in China, it has still emerged in several areas at times. Herein, this study was conducted to develop an antibody vaccine which can clear the classical swine fever virus (CSFV) immediately after the pathogen invasion. Bovine viral diarrhoea virus (BVDV) infectious cDNA clone pASH28 was used to express a single-chain fragment variable (scFv) antibody against CSFV (CSFV/ scFv) by reverse genetic technique. CSFV/scFv was inserted at the N-terminus of the C or Erns gene, generating two rBVDVs (rBVDV/C-CSFV/scFv and rBVDV/Erns-CSFV/scFv). Although both the rBVDVs could stably propagate on MDBK cells, different cellular characteristics existed. Obvious green fluorescence against the CSFV/scFv antibody could be visual on the cytomembrane or outside of the cells infected with rBVDV/Erns-CSFV/scFv, while much weaker fluorescence was observed in rBVDV/C-CSFV/scFv - infected cells. The CSFV/scFv antibodies induced by the two rBVDVs could recognize CSFV, but the rBVDV/Erns-CSFV/scFv induced stronger viral neutralization reaction. It was speculated that the neutralization activity might be associated with the expression location of CSFV/scFv antibody. The datas in this study provide evidence that rBVDV/Erns-CSFV/scFv may be engineered as a new antibody vaccine candidate against CSFV in the future.

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