Acta Veterinaria et Zootechnica Sinica ›› 2023, Vol. 54 ›› Issue (2): 736-743.doi: 10.11843/j.issn.0366-6964.2023.02.030

• PREVENTIVE VETERINARY MEDICINE • Previous Articles     Next Articles

The Antiviral Activity of Goat Interferon Alpha to Caprine Parainfluenza Virus 3

SUN Min1,2*, HAO Fei1, ZHANG Wenwen1, LI Wenliang1,3,4, YANG Leilei1, MAO Li1,2, CHENG Zilong1, LIU Maojun1,3,4   

  1. 1. Institute of Veterinary Medicine, Jiangsu Academy of Agricultural Sciences/Key Laboratory of Veterinary Biological Engineering and Technology, Ministry of Agriculture, Nanjing 210014, China;
    2. School of Life Sciences, Jiangsu University, Zhenjiang 212013, China;
    3. School of Food and Biological Engineering, Jiangsu University, Zhenjiang 212013, China;
    4. College of Veterinary Medicine, Nanjing Agricultural University, Nanjing 210095, China
  • Received:2022-01-12 Online:2023-02-23 Published:2023-02-21

Abstract: The aim of this study was to investigate the antiviral activity of goat interferon α (IFN-α) to caprine parainfluenza virus 3 (CPIV3). The sequence characteristics of goat IFN-α was analyzed, and the homology of IFN-α from different species was compared. Then the recombinant expression plasmid pET-30a-gIFN-α by inserting goat IFN-α gene (removing the signal peptide gene sequence) into vector pET-30a was constructed and transformed into Rosetta (DE3), after induced by IPTG, the goat IFN-α was expressed and purified. Then the relative expression level of interferon-stimulated genes (ISGs) was measured, and the anti-CPIV3 activity was measured after exogenous goat IFN-α treatment on Madin-Darby bovine kidney cell(MDBK cell) by TCID50 and Western blot. The results showed that, the protein concentration of goat IFN-α was 0.20 mg·mL-1, and Western blot analysis showed that the relative molecular weight was about 20 ku, which was consistent with expectations. The RT-qPCR result showed that the incubation of goat IFN-α on MDBK cells induced the up-regulation of the six ISGs including RSAD2, STAT1 and ISG15. Meanwhile, the goat IFN-α inhibited the CPIV3 replication, and down-regulated the expression level of the viral nonstructural protein C. All above results indicated that goat IFN-α could significantly inhibit the proliferation of CPIV3 on MDBK cells. This study extended the research type I interferon, and promoted the prevention and control of ruminant diseases.

Key words: goat IFN-α, prokaryotic expression, ISGs, caprine parainfluenza virus 3, antiviral activity

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