title: Fusion-related host proteins are actively regulated by NA during influenza infection as revealed by quantitative proteomics analysis.
abstract: Three recombinant influenza A viruses with different neuraminidases (NAs) in the background of A/PR/8/34 (PR8), named rPR8-H5N1NA, rPR8-H9N2NA, and rPR8-H1N1NA, derived from H5N1, H9N2, H1N1 (swine) viruses, respectively, were constructed. We performed a quantitative proteomics analysis to investigate differential protein expression in Madin-Darby canine kidney (MDCK) cells infected with recombinant and wild-type influenza viruses to determine whether NA replacement would alter host cell gene expression. Using matrix-assisted laser desorption/ionization time-of-flight mass spectrometry (MALDI-TOF-TOF MS) and two-dimensional gel electrophoresis (2-DE), we identified 12 up-regulated and 49 down-regulated protein spots, including cytoskeletal proteins, molecular biosynthesis proteins, ubiquitin-proteasome pathway proteins, and heat shock proteins. The most significant changes in infected cells were observed for molecular biosynthesis proteins. We found more differentially expressed protein spots in cells infected with rPR8-H5N1NA or rPR8-H9N2NA viruses than cells infected with wild-type virus. Many of those proteins are postulated to be involved in cell-cell fusion, but the full mechanism remains to be explored. Meanwhile, our data demonstrate that the wild-type virus has evolutionary advantages over recombinant viruses.
authors.affiliation: National Institute of Metrology, Beijing, China.
authors.forename: Zhiwei
authors.initials: Z
authors.lastname: Sui
authors.affiliation: BGI-Shenzhen, Shenzhen, China.
authors.forename: Bo
authors.initials: B
authors.lastname: Wen
authors.affiliation: State Key Laboratory of Virology, Center for Emerging Infectious Diseases, Wuhan Institute of Virology, Chinese Academy of Sciences, Wuhan, Hubei, China.
authors.forename: Zhimin
authors.initials: Z
authors.lastname: Gao
authors.affiliation: State Key Laboratory of Virology, Center for Emerging Infectious Diseases, Wuhan Institute of Virology, Chinese Academy of Sciences, Wuhan, Hubei, China.
authors.forename: Quanjiao
authors.initials: Q
authors.lastname: Chen
mesh_terms: D000818:Animals; D002460:Cell Line; D004285:Dogs; D015536:Down-Regulation / Q000235:genetics; D015870:Gene Expression / Q000235:genetics; D009980:Influenza A virus / Q000235:genetics*; D061985:Madin Darby Canine Kidney Cells; D009439:Neuraminidase / Q000235:genetics*; D009976:Orthomyxoviridae Infections / Q000235:genetics* / Q000821:virology; D014176:Protein Biosynthesis / Q000235:genetics; D011506:Proteins / Q000235:genetics*; D020543:Proteome / Q000235:genetics*; D040901:Proteomics / Q000379:methods; D015854:Up-Regulation / Q000235:genetics
chemical_list: D011506:Proteins; D020543:Proteome; D009439:Neuraminidase