title: Quantitative subcellular proteome and secretome profiling of influenza A virus-infected human primary macrophages.
abstract: Influenza A viruses are important pathogens that cause acute respiratory diseases and annual epidemics in humans. Macrophages recognize influenza A virus infection with their pattern recognition receptors, and are involved in the activation of proper innate immune response. Here, we have used high-throughput subcellular proteomics combined with bioinformatics to provide a global view of host cellular events that are activated in response to influenza A virus infection in human primary macrophages. We show that viral infection regulates the expression and/or subcellular localization of more than one thousand host proteins at early phases of infection. Our data reveals that there are dramatic changes in mitochondrial and nuclear proteomes in response to infection. We show that a rapid cytoplasmic leakage of lysosomal proteins, including cathepsins, followed by their secretion, contributes to inflammasome activation and apoptosis seen in the infected macrophages. Also, our results demonstrate that P2X₇ receptor and src tyrosine kinase activity are essential for inflammasome activation during influenza A virus infection. Finally, we show that influenza A virus infection is associated with robust secretion of different danger-associated molecular patterns (DAMPs) suggesting an important role for DAMPs in host response to influenza A virus infection. In conclusion, our high-throughput quantitative proteomics study provides important new insight into host-response against influenza A virus infection in human primary macrophages.
authors: Institute of Biotechnology, University of Helsinki, Helsinki, Finland.
authors: Niina
authors: N
authors: Lietzén
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authors: T
authors: Ohman
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authors: Rintahaka
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authors: Julkunen
authors: Tero
authors: T
authors: Aittokallio
authors: Sampsa
authors: S
authors: Matikainen
authors: Tuula A
authors: TA
authors: Nyman
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