Acta Veterinaria et Zootechnica Sinica ›› 2025, Vol. 56 ›› Issue (4): 1834-1842.doi: 10.11843/j.issn.0366-6964.2025.04.031

• Preventive Veterinary Medicine • Previous Articles     Next Articles

Effect of Neuromedin B and Receptors on ITCH Expression Induced by H9N2 Subtype Influenza Virus Infection

TIAN Shimao, TIAN Ke, LIU Yuqian, GU Qingxin, SHEN Yunzhi, ZHANG Chenghuai, BAO Yinli, YANG Guihong*()   

  1. Key Laboratory of Fujian-Taiwan Animal pathogen Biology, College of Animal Science, Fujian Agriculture and Forestry University, Fuzhou 350002, China
  • Received:2024-05-27 Online:2025-04-23 Published:2025-04-28
  • Contact: YANG Guihong E-mail:yangguihong@fafu.edu.cn

Abstract:

Matrix protein 1 (M1), encoded by influenza A virus (IAV) ubiquitin ligase, antagonizes the host's antiviral immune response by modulating the E3 ITCH-mediated ubiquitination. The previous studies in this study showed that neurointerleukin B (NMB) and its receptor NMBR could inhibit the innate immune response of IAV, however, their effects on the expression of ubiquitin ligase ITCH induced by IAV infection have not been reported. In this study, the effects of NMB and NMBR on the expression of ITCH and M1 protein were analyzed in vitro and in vivo by using an avian influenza virus stimulation model of NMB H9N2 subtype. The results showed that exogenous NMB and overexpression of NMBR could significantly inhibit ITCH expression in H9N2 avian influenza infected A549 cells and lung tissues of mice, interference of NMBR expression could significantly promote ITCH expression in A549 cells and lung tissue of mice, the expression trend of NMB and NMBR in ITCH induced by H9N2 avian influenza virus infection was positively correlated with the expression of M1 protein. These results suggest that NMB and NMBR can affect the expression of M1 protein encoded by H9N2 by regulating the expression of ITCH, thus exerting the innate immune response against H9N2 avian influenza virus infection.

Key words: neuromedin B, neuromedin B receptor NMBR, H9N2 influenza virus, E3 ubiquitin ligase ITCH

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