China Animal Husbandry and Veterinary Medicine ›› 2022, Vol. 49 ›› Issue (6): 2056-2063.doi: 10.16431/j.cnki.1671-7236.2022.06.005

• Biotechnology • Previous Articles     Next Articles

Construction of Bovine Viral Diarrhea Virus E0-E2 Gene Fusion Adenovirus and Evaluation of Immune Effect in Mice

REN Jie1, LIN Ling1, TANG Deyuan1, ZENG Zhiyong1, WANG Bin1, YU Guangmei1, ZHENG Ruwen1, WU Daoyi2, HUANG Tao1   

  1. 1. College of Animal Science, Guizhou University, Guiyang 550025, China;
    2. Bijie Institute of Animal Husbandry and Veterinary Sciences, Bijie 551700, China
  • Received:2021-12-21 Online:2022-06-05 Published:2022-05-27

Abstract: 【Objective】 The experiment was aimed to study the application potential of recombinant Adenovirus with E0 and E2 tandem genes of Bovine viral diarrhea virus (BVDV) as genetic engineering vaccine.【Method】 The recombinant Adenovirus was amplified by PCR, E0-E2 gene fusion was performed by overlapping extended PCR and the recombinant shuttle plasmid pDC316-E0-E2 was constructed, which was co-transfected into HEK293T cells with AdMax skeleton plasmid for packaging, and verified by Western blotting.The titer of the virus was determined by Reed-Muench method.The immune effect was studied by ELISA and flow cytometry after the mice were injected by muscle and subcutaneous injection.【Result】 The target fragments of E0 and E2 genes were successfully amplified, which were 681 and 1 122 bp, and the complete Adenovirus AD5-E0-E2 with titer of 1.1×1010 PFU/mL was obtained.Western blotting was used to detect the expression of Ad5-E0-E2 exogenous gene in HEK293T cells, and the target band (65 ku) was obtained, which was consistent with expectations.ELISA results showed that high antibody levels could be generated by both muscle and subcutaneous injection.Flow cytometry results showed that the ratios of CD4+ and CD4+/CD8+ in groups of intramuscular and subcutaneous injection Ad5-E0-E2 were both extremely significantly higher than that in PBS group (P<0.01).【Conclusion】 Adenovirus Ad5-E0-E2 was successfully constructed in this experiment, which had good reactivity and immunogenicity, and could induce the body to produce specific antibodies against BVDV.

Key words: Bovine viral diarrhea virus (BVDV); gene fusion; Adenovirus

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