A highly pathogenic porcine reproductive and respiratory syndrome virus candidate vaccine based on Japanese encephalitis virus replicon system

作者：Hu, Pingsheng; Chen, Xiaoming; Huang, Lihong; Liu, Shukai; Zang, Fuyu; Xing, Jinchao; Zhang, Youyue; Liang, Jiaqi; Zhang, Guihong; Liao, Ming^*; Qi, Wenbao^*

来源：PeerJ, 2017, 5: e3514.

DOI：10.7717/peerj.3514

• JEV replicon
• HP-PRRSV
• Vaccine

In the swine industry, porcine reproductive and respiratory syndrome (PRRS) is a highly contagious disease which causes heavy economic losses worldwide. Effective prevention and disease control is an important issue. In this study, we described the construction of a Japanese encephalitis virus (JEV) DNA-based replicon with a cytomegalovirus (CMV) promoter based on the genome of Japanese encephalitis live vaccine virus SA14-14-2, which is capable of offering a potentially novel way to develop and produce vaccines against a major pathogen of global health. This JEV DNA-based replicon contains a large deletion in the structural genes (C-prM-E). A PRRSV GP5/M was inserted into the deletion position of JEV DNA based replicons to develop a chimeric replicon vaccine candidate for PRRSV The results immune that BALB/c mice models with the replicon vaccines pJEV-REP-G-2A-M-IRES and pJEV-REP-G-2A-M stimulated antibody responses and induced cellular response. Analysis of ELSA data showed that vaccination with the replicon vaccine expressing GP5/M induced a better antibodies response than traditional DNA vaccines. Therefore, the results suggested that this ectopic expression system based. on DNA-based replicons may represent a useful molecular platform for various biological applications, and the DNA based replicons expressing GP5/M can be further developed into a novel, safe vaccine candidate for PRRS.

• 出版日期2017-7-20
• 单位华南农业大学