期刊
BMC MICROBIOLOGY
卷 17, 期 -, 页码 -出版社
BIOMED CENTRAL LTD
DOI: 10.1186/s12866-017-1097-0
关键词
H5N1 subtype HPAIV; NS1; ANXA2; Viral replication
类别
资金
- National Key R&D Program of China [2016YFD0500800]
- International Science & Technology Cooperation Program of China [2014DFR31260]
Background: Non-structural protein 1 (NS1) is a multifunctional protein and a crucial regulatory factor in the replication and pathogenesis of avian influenza virus (AIV). Studies have shown that NS1 can interact with a variety of host proteins to modulate the viral life cycle. We previously generated a monoclonal antibody against NS1 protein; In the current research study, using this antibody, we immunoprecipitated host proteins that interact with NS1 to better understand the roles played by NS1 in communications between virus and host. Results: Co-immunoprecipitation experiments identified annexin A2 (ANXA2) as a target molecule interacting with NS1. Results from confocal laser scanning microscopy indicated that NS1 co-localized with ANXA2 in the cell cytoplasm. Overexpression of ANXA2 significantly increased the titer of H5N1 subtype HPAIV, whereas siRNA-mediated knockdown of ANXA2 markedly inhibited the expression of viral proteins and reduced the progeny virus titer. Conclusions: Our results indicate that ANXA2 interacts with NS1 and ANXA2 expression increases HPAIV replication.
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