ACTA VETERINARIA ET ZOOTECHNICA SINICA ›› 2019, Vol. 50 ›› Issue (8): 1635-1641.doi: 10.11843/j.issn.0366-6964.2019.08.012

• PREVENTIVE VETERINARY MEDICINE • Previous Articles     Next Articles

Construction and Identification of Replication Defective Recombinant Adenovirus Expressing ASFV P72 Protein

HU Yongxin, ZHAO Yonggang, ZHANG Yongqiang, LIU Fuxiao, FAN Xiaoxu, WU Xiaodong*, WANG Zhiliang*   

  1. China Animal Health and Epidemiology Center, National Research Center for Exotic Animal Disease, Qingdao 266032, China
  • Received:2019-02-12 Online:2019-08-23 Published:2019-08-23

Abstract: This study aimed to construct a defective recombinant adenovirus capable of expressing the P72 protein of African swine fever virus (ASFV). The ASFV B646L gene based on relevant China-SY18 isolate was synthesized. The synthetic B646L gene was cloned into transfer vector pENTR/D-TOPO. In order to construct a recombinant adenovirus, the recombination between the transfer vector pENTR/D-TOPO-ASFV-P72 and the backbone vector pAd/CMV/V5-DEST was done. The PacⅠ-linearized recombinant vector was transfected into 293A cell to produce recombinant adenovirus by serial passage. The results showed that the titers of the recombinant adenovirus Ad5-ASFV-P72 were 2.53×109 IFU·mL-1; the ASFV-P72 protein was expressed successfully in Vero cells by identification of the Indirect immunofluorescence assay and Western blot, and the expressed protein could reacted with ASFV standard positive serum specifically. Ad5-ASFV-P72 recombinant adenovirus was constructed successfully in the study. These findings not only lay the solid foundation for developing ASFV multi-gene recombinant adenoviral vector vaccine, but also provide a safe and effective antigen for the establishment serological diagnostic methods.

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