小反刍兽疫病毒样颗粒在昆虫细胞-杆状病毒系统中的自组装、释放及其在小鼠和山羊中的免疫原性

Self-assembly and release of peste des petits ruminants virus-like particles in an insect cell-baculovirus system and their immunogenicity in mice and goats.

作者信息

Li Wenchao, Jin Hongyan, Sui Xiukun, Zhao Zhanzhong, Yang Chenghuai, Wang Wenquan, Li Junping, Li Gang

机构信息

State Key Laboratory of Animal Nutrition, Beijing Institute of Animal Science and Veterinary Medicine, Chinese Academy of Agricultural Sciences; Beijing Scientific Observation and Experiment Station for Veterinary Drug and Veterinary Biotechnology, Ministry of Agriculture, Beijing, PR China; Beijing CevaHuadu Biological Co., Ltd, Beijing, PR China.

State Key Laboratory of Animal Nutrition, Beijing Institute of Animal Science and Veterinary Medicine, Chinese Academy of Agricultural Sciences; Beijing Scientific Observation and Experiment Station for Veterinary Drug and Veterinary Biotechnology, Ministry of Agriculture, Beijing, PR China.

出版信息

PLoS One. 2014 Aug 12;9(8):e104791. doi: 10.1371/journal.pone.0104791. eCollection 2014.

Abstract

Peste des petits ruminants (PPR) is an acute, febrile, viral disease of small ruminants that has a significant economic impact. For many viral diseases, vaccination with virus-like particles (VLPs) has shown considerable promise as a prophylactic approach; however, the processes of assembly and release of peste des petits ruminants virus (PPRV) VLPs are not well characterized, and their immunogenicity in the host is unknown. In this study, VLPs of PPRV were generated in a baculovirus system through simultaneous expression of PPRV matrix (M) protein and hemaglutin in (H) or fusion (F) protein. The released VLPs showed morphology similar to that of the native virus particles. Subcutaneous injection of these VLPs (PPRV-H, PPRV-F) into mice and goats elicited PPRV-specific IgG production, increased the levels of virus neutralizing antibodies, and promoted lymphocyte proliferation. Without adjuvants, the immune response induced by the PPRV-H VLPs was comparable to that obtained using equivalent amounts of PPRV vaccine. Thus, our results demonstrated that VLPs containing PPRV M protein and H or F protein are potential "differentiating infected from vaccinated animals" (DIVA) vaccine candidates for the surveillance and eradication of PPR.

摘要

小反刍兽疫(PPR)是一种对小反刍动物具有重大经济影响的急性、发热性病毒性疾病。对于许多病毒性疾病,用病毒样颗粒(VLP)进行疫苗接种已显示出作为一种预防方法具有相当大的前景;然而,小反刍兽疫病毒(PPRV)VLP的组装和释放过程尚未得到很好的表征,其在宿主体内的免疫原性也未知。在本研究中,通过同时表达PPRV基质(M)蛋白和血凝素(H)或融合(F)蛋白,在杆状病毒系统中产生了PPRV的VLP。释放的VLP显示出与天然病毒颗粒相似的形态。将这些VLP(PPRV-H、PPRV-F)皮下注射到小鼠和山羊体内可引发PPRV特异性IgG的产生,提高病毒中和抗体水平,并促进淋巴细胞增殖。在无佐剂的情况下,PPRV-H VLP诱导的免疫反应与使用等量PPRV疫苗获得的免疫反应相当。因此,我们的结果表明,含有PPRV M蛋白和H或F蛋白的VLP是用于监测和根除PPR的潜在“区分感染动物和免疫动物”(DIVA)疫苗候选物。

https://cdn.ncbi.nlm.nih.gov/pmc/blobs/9166/4130610/f6aa4161ded0/pone.0104791.g001.jpg

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