Acta Agriculturae Zhejiangensis ›› 2022, Vol. 34 ›› Issue (1): 33-40.DOI: 10.3969/j.issn.1004-1524.2022.01.05

• Animal Science • Previous Articles     Next Articles

Effect of cryptochlorogenic acid on immunomodulatory and antioxidant in mice of lung injury induced by H9N2-AIV

ZHANG Xin1(), ZHANG Ming1, HE Hongxuan2,*(), HU Yanchun1,*()   

  1. 1. College of Veterinary Medicine, Sichuan Agricultural University, Chengdu 611130, China
    2. Institute of Zoology, Chinese Academy of Sciences, Beijing 100101, China
  • Received:2020-09-14 Online:2022-01-25 Published:2022-02-05
  • Contact: HE Hongxuan,HU Yanchun

Abstract:

To investigate the effect of cryptochlorogenic acid(4-CQA)on lung injury and recovery in mice infected with avian influenza H9N2 virus, ninety SPF KM mice(6-8 weeks old)were randomly divided into H9N2 group,H9N2+4-CQA group, control group and 4-CQA group. Then H9N2-AIV was used to induce lung injury and received 4-CQA intragastric administration respectively in mice. The lung histopathlogy changes, the lung index and spleen index, and the contents of malondialdehyde (MDA),total superoxide dismutase (T-SOD) and myeloperoxidase (MPO) in the lung tissue homogenate, and the ratio of T cell subgroups (CD4+、CD8+、CD4+/CD8+) were observed. The results showed that the group of H9N2 presented depression and shortness of breath; lung index increased and spleen index decreased; histopathological manifestations of lung were alveolar atrophy, alveolar septal thickening and local lung consolidation; CD4+/CD8+ ratio of T lymphocyte subsets decreased significantly (P<0.05), activity of T-SOD decreased significantly, content of MDA increased significantly, and activity of MPO increased significantly (P<0.05). After 4-CQA treatment, lung index decreased and spleen index increased; lung histopathological damage was alleviated; CD4+/CD8+ ratio of T cell subgroups was significantly increased (P<0.05); T-SOD and MPO activity in lung were significantly increased and the content of MDA was significantly decreased (P<0.05). It was concluded that 4-CQA can alleviate the lung injury induced by avian influenza H9N2 virus by maintaining immune balance and reducing oxidative damage.

Key words: H9N2-AIV, 4-CQA, lung injury, immunomodulation, antioxidant

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