Acta Veterinaria et Zootechnica Sinica ›› 2024, Vol. 55 ›› Issue (10): 4530-4541.doi: 10.11843/j.issn.0366-6964.2024.10.024

• Preventive Veterinary Medicine • Previous Articles     Next Articles

Construction and Growth Characteristics of ORF123 Deleted Lumpy Skin Disease Virus Strain

Fangping WANG1(), Shanhui REN2,*(), Xiaohong GAO2, Xue YANG1, Jiyun LI3, Xiangwei WANG2, Xiangping YIN2, Yuefeng SUN2, Haotai CHEN2, Xuerui WAN1,*()   

  1. 1. College of Veterinary Medicine, Gansu Agricultural University, Lanzhou 730070, China
    2. Lanzhou Veterinary Research Institute, Chinese Academy of Agricultural Sciences, Lanzhou 730046, China
    3. Qinghai Academy of Science and Technology, Xining 810003, China
  • Received:2023-10-18 Online:2024-10-23 Published:2024-11-04
  • Contact: Shanhui REN, Xuerui WAN E-mail:344884873@qq.com;renshanhui@caas.cn;wanxr@gsau.edu.cn

Abstract:

The aim of this study was to analyze the growth characteristics of the Lumpy skin disease virus (LSDV) strain with the ORF123 gene deleted, which laid a foundation for the functional research of LSDV ORF123. ORF123 was used as the target gene and enhanced green fluorescent protein (EGFP)was used as the screening marker, the homologous left and right arm sequences and the EGFP gene expression frame were amplified and fused by overlapping PCR and cloned into pUC-19T vector to construct pH5-LSDVΔORF123-EGFP. The plasmid pH5-LSDVΔORF123-EGFP was then transfected into Vero cells and after that the cells were infected with the LSDV/CHA/FJ/2021 strain. The recombinant virus strain LSDVΔORF123-EGFP was purified through multiple plaque screening using EGFP as a screening markers, and its viral genetic stability and growth characteristics were characterized. The results revealed that the recombinant virus was able to stably express green fluorescent protein across at least 8 cell passages and the one-step growth curve following MDBK cell inoculation indicated that the titer of the recombinant virus was slightly lower than that of the parental strain. In conclusion, the recombinant virus strain LSDVΔORF123-EGFP was successfully obtained, which laid a foundation for the study of the biological function of LSDV ORF123 protein and the development of a live attenuated LSDV vaccine.

Key words: lumpy skin disease virus, ORF123 gene, growth characteristic, homologous recombination, recombinant virus

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