Acta Veterinaria et Zootechnica Sinica ›› 2024, Vol. 55 ›› Issue (12): 5839-5853.doi: 10.11843/j.issn.0366-6964.2024.12.045

• Clinical Veterinary Medicine • Previous Articles     Next Articles

Effect of Modified Yuyin Decoction on cGAS-STING Pathway of African Swine Fever Virus Infected PAMs

CHEN Xiaoli1(), ZHOU Jiahao1, ZHOU Jing1, QU Qian1, WANG Zhihua1, XIONG Ying1, ZHU Yongqi1, JIA Weixin1, LÜ Weijie1,*(), GUO Shining1,2,*()   

  1. 1. College of Veterinary Medicine, South China Agricultural University, Guangzhou 510642, China
    2. International Institute of Traditional Chinese Veterinary Medicine, South China Agricultural University, Guangzhou 510642, China
  • Received:2024-01-02 Online:2024-12-23 Published:2024-12-27
  • Contact: LÜ Weijie, GUO Shining E-mail:xiaolichen@stu.scau.edu.cn;lvwj@scau.edu.cn;shining@scau.edu.cn

Abstract:

In order to evaluate the efficacy of Chinese traditional medicine against African swine fever virus (ASFV) in vitro, five experimental drugs were used in this study. The effects of different Chinese herbal medicines on ASFV encored capshell protein p72 in porcine alveolar macrophages (PAMs) infected with African swine fever virus were detected by qPCR. Modified Yuyin decoction (MYY) was selected as a Chinese medicine that could significantly reduce the expression of ASFV-p72 gene. The main components of anti-ASFV were detected by LC-MS analysis. CCK8 method was used to observe the effect of modified Yuyin decoction on the activity of PAMs. The expression of ASFV-p72 gene was detected by fluorescence quantitative PCR. Western blot and ELISA were used to detect CGAS-STING signaling pathway protein expression. RU.521 was used as a cGAS inhibitor to verify the anti-ASFV effect of MYY in the CGAS-STING pathway. The results showed that MYY can significantly reduce the expression of ASFV-p72 gene in PAMs, and the best effect is given at 2 h after ASFV infection, and it has a concentration-dependent improvement effect on the cell viability after ASFV infection of PAMs. The expression levels of interferon gene stimulating protein (STING), TANK binding kinase 1 (TBK1), interferon regulatory factor 3 (IRF3) and interferon induced transmembrane protein 3 (IFITM3) in the supernatant of PAMs cells were decreased by MYY 2 h after the challenge. The expression of cyclic GMP-AMP synthetase (cGAS) and interferon β (IFNβ) protein in PAMs cells increased, and MYY could activate the cGAS-STING-TBK1-IRF3-IFNβsignaling pathway and promote the expression of IFITM3. After treatment with RU.521, MYY could still increase cell viability and decrease the expression of ASFV-p72 gene. In summary, MYY has a potential anti-ASFV effect, which may be related to the activation of cGAS-STING signaling pathway to promote the expression of IFITM3.

Key words: modified Yuyin decoction, African swine fever virus, ASFV-p72 gene, CGAS-STING signaling pathway, LC-MS analysis

CLC Number: