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Self-assembled raccoon dog parvovirus VP2 protein confers immunity against RDPV disease in raccoon dogs: in vitro and in vivo studies

文献类型： 外文期刊

作者： Xia Linya;Luo Guoliang;Wu Mingjie;Wang Lei;Zhang Ning;Wu Congmei;Yin Yuhe

作者机构：

关键词： Escherichia coli; Immunogenicity; Raccoon dog parvovirus; Trigger factor 16; Virus like particle

期刊名称： Virology Journal

ISSN： 1743-422X

年卷期： 2021 年 18 卷 1 期

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收录情况： JCR（2021版）

摘要： Background: Raccoon dog parvovirus (RDPV) causes acute infectious diseases in raccoon dogs and may cause death in severe cases. The current treatment strategy relies on the extensive usage of classical inactivated vaccine which is marred by large doses, short immunization cycles and safety concerns. Methods: The present study aimed at optimization of RDPV VP2 gene, subcloning the gene into plasmid pET30a, and its subsequent transfer to Escherichia coli with trigger factor 16 for co-expression. The protein thus expressed was purified with ammonium sulfate precipitation, hydrophobic chromatography, and endotoxin extraction procedures. VLPs were examined by transmission electron microscopy, dynamic light scattering, and the efficacy of VLPs vaccine was tested in vivo. Results: Results indicated that RDPV VP2 protein could be expressed soluble. Transmission electron microscopy and dynamic light scattering results indicated that RDPV VP2 self-assembled into VLPs. Hemagglutination inhibition antibody titers elicited by Al(OH)3 adjuvanted RDPV VLPs were comparable with RDPV inactivated vaccines, and the viral loads in the blood of the struck raccoon dogs were greatly reduced. Hematoxylin and eosin and Immunohistochemical results indicated that RDPV VLPs vaccine could protect raccoon dogs against RDPV infections. Conclusions: These results suggest that RDPV VLPs can become a potential vaccine candidate for RDPV therapy. © 2021, The Author(s).

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