Acta Veterinaria et Zootechnica Sinica ›› 2023, Vol. 54 ›› Issue (8): 3406-3414.doi: 10.11843/j.issn.0366-6964.2023.08.025

• PREVENTIVE VETERINARY MEDICINE • Previous Articles     Next Articles

Analysis of Factors Affecting the Infectivity of African Swine Fever Virus on Cultured Cells

FENG Yongzhi1,2, GONG Ting2,3, WU Dongdong1,2, GAO Qi1,3,4, ZHENG Xiaoyu1,3, ZHANG Guihong1,2,3,4, SUN Yankuo1,2,4*   

  1. 1. National Regional Laboratory of African Swine Fever (Guangzhou), College of Veterinary Medicine, South China Agricultural University, Guangzhou 510642, China;
    2. Key Laboratory of Prevention and Control of Animal-borne Zoonoses in Guangdong Province, Guangzhou 510642, China;
    3. Lingnan Modern Agricultural Science and Technology Guangdong Provincial Laboratory Maoming Branch, Maoming 525000, China;
    4. Key Laboratory of Zoonotic Diseases, Ministry of Agriculture and Rural Affairs, Guangzhou 510642, China 510642
  • Received:2022-10-31 Online:2023-08-23 Published:2023-08-22

Abstract: Porcine primary alveolar macrophages (PAMs) were the main target cells of African swine fever virus (ASFV), and it was difficult for ASFV to grow and multiply continuously in other in vitro cell lines except host monocytes/macrophages. The aim of this study was to investigate the factors affecting ASFV in in vitro passaging cultures. By comparing the genome-wide transcriptional profile differences between ASFV inoculated susceptible cells PAMs and non-susceptible cell lines 3D4/21 and PK15 cells; Using small molecule drugs to alter cell metabolism or cycle, physical methods to alter cell adhesion; detecting virus proliferation in 3D4/21 and PK15 cell lines by fluorescence quantitative PCR, Western blot, red cell adsorption. The results showed that:ASFV inoculation of both 3D4/21 and PK15 cells and PAMs cells were significantly enriched in genes common to both cell adhesion, cell cycle and cell metabolism; The ability of ASFV to infect PK15 and 3D4/21 cells was not significantly affected by treatment of cells with various small molecule drugs that regulate cell cycle and cell metabolism; The ability of ASFV to infect PK15 and 3D4/21 cells was significantly affected by suspension culture to regulate The ability of ASFV to infect PK15 and 3D4/21 cells was significantly improved after cell adhesion was regulated by suspension culture, but the replication ability of the virus gradually decreased with the increase in the number of passages. In conclusion, cell adhesion may be one of the important factors affecting the in vitro infection ability of ASFV, but altering cell adhesion did not maintain the replication ability of ASFV. This study provides a preliminary reference for the establishment of ASFV in vitro cell lines.

Key words: African swine fever virus, genome-wide transcriptional profiling, suspension culture, in vitro infected cell line

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