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Soluble FMDV VP1 proteins fused with calreticulin expressed in Escherichia coli under the assist of trigger factor16 (Tf16) formed into high immunogenic polymers

文献类型： 外文期刊

作者： Liu, Chang 1 ; Feng, Hua 2 ; Liu, Yunchao 2 ; Chen, Yumei 3 ; Yang, Suzhen 2 ; Deng, Ruiguang 2 ; Zhang, Gaiping 1 ;

作者机构： 1.Jilin Univ, Coll Vet Med, Changchun 130033, Jilin, Peoples R China

2.Henan Acad Agr Sci, Key Lab Anim Immunol, Henan Prov Key Lab Anim Immunol, Minist Agr, Zhengzhou 450002, Henan, Peoples R China

3.Zhengzhou Univ, Sch Life Sci, Zhengzhou 450001, Peoples R China

4.Henan Agr Univ, Coll Anim Sci & Vet Med, Zhengzhou 450002, Henan, Peoples R China

关键词： FMDV; VP1 protein; Calreticulin; Trigger factor 16; Polymers; Immunogenicity

期刊名称：INTERNATIONAL JOURNAL OF BIOLOGICAL MACROMOLECULES （ 影响因子：6.953； 五年影响因子：6.737 ）

ISSN： 0141-8130

年卷期： 2020 年 155 卷

页码：

收录情况： SCI

摘要： Foot and mouth disease virus (FMDV) is a highly contagious pathogen propagating among cloven-hoofed animals. As a major immunogenic protein, VP1 plays a pivotal role in the induction of neutralizing antibodies, which therefore is an ideal target for developing subunit vaccines. In current study, four prokaryotic expression clones (rV4C, rC4V, rV5F and rF5V) were constructed by fusing truncated calreticulin (CRT) (120-250 aa or 120-308 aa) at the N/C terminal of vp1 gene, and co-expressed with chaperone trigger factor 16 (Tf16) in E. coli, respectively. The soluble recombinant CRT-fused VP1 proteins could form into homogeneous reactive polymers with average hydrodynamic diameters around 100 nm according to the dynamic light scattering (DLS) data. Immunization of guinea pigs with 10 mu g purified CRT-fused VP1 proteins induced high levels of antibodies against naked-VP1 through indirect ELISA. Sandwich ELISA showed that only rC4V could elicit the same level of antibody against FMD virus as commercial inactivated vaccine after booster. The lymphocyte cytokines secretion of immunized rC4V was higher than the other CRT-fused VP1 proteins in guinea pigs. These results showed that the soluble CRT-fused VP1 proteins, especially rC4V, expressed with Tf16 in E. coli might have potential to be used as subunit vaccine candidate against FMDV. (C) 2019 Elsevier B.V. All rights reserved.

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