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    Interferon-gamma and granulocyte/monocyte colony-stimulating factor production by natural killer cells involves different signaling pathways and the adaptor stimulator of interferon genes (STING)

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    Authors
    Souza-Fonseca-Guimaraes, Fernando
    Parlato, Marianna
    DeOliveira, Rosane B.
    Golenbock, Douglas T.
    Fitzgerald, Katherine A.
    Shalova, Irina N.
    Biswas, Subhra K.
    Cavaillon, Jean-Marc
    Adib-Conquy, Minou
    UMass Chan Affiliations
    Department of Medicine, Division of Infectious Diseases and Immunology
    Document Type
    Journal Article
    Publication Date
    2013-04-12
    Keywords
    Cytokine
    Interferon
    Natural Killer (NK) cell
    Signal Transduction
    Toll-like Receptors (TLR)
    GM-CSF
    IFN-gamma
    STING
    TLR9
    Immunity
    Immunology and Infectious Disease
    Immunology of Infectious Disease
    Infectious Disease
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    https://doi.org/10.1074/jbc.M112.435602
    Abstract
    Natural killer (NK) cells are important for innate immunity in particular through the production of IFN-gamma and GM-CSF. Both cytokines are important in restoration of immune function of tolerized leukocytes under inflammatory events. The expression of TLRs in NK cells has been widely studied by analyzing the mRNA of these receptors, rarely seeking their protein expression. We previously showed that murine spleen NK cells express TLR9 intracellularly and respond to CpG oligodeoxynucleotide (CpG-ODN) by producing IFN-gamma and GM-CSF. However, to get such production the presence of accessory cytokines (such as IL-15 and IL-18) was required, whereas CpG-ODN or accessory cytokines alone did not induce IFN-gamma or GM-CSF. We show here that TLR9 overlaps with the Golgi apparatus in NK cells. Furthermore, CpG-ODN stimulation in the presence of accessory cytokines induces the phosphorylation of c-Jun, STAT3, and IkappaBalpha. IFN-gamma and GM-CSF production requires NF-kappaB and STAT3 activation as well as Erk-dependent mechanisms for IFN-gamma and p38 signaling for GM-CSF. Using knock-out-mice, we show that UNC93b1 and IL-12 (produced by NK cells themselves) are also necessary for IFN-gamma and GM-CSF production. IFN-gamma production was found to be MyD88- and TLR9-dependent, whereas GM-CSF was TLR9-independent but dependent on STING (stimulator of interferon genes), a cytosolic adaptor recently described for DNA sensing. Our study thereby allows us to gain insight into the mechanisms of synergy between accessory cytokines and CpG-ODN in NK cells. It also identifies a new and alternative signaling pathway for CpG-ODN in murine NK cells.
    Source

    This research was originally published in: J Biol Chem. 2013 Apr 12;288(15):10715-21. doi: 10.1074/jbc.M112.435602. Epub 2013 Feb 26. Link to article on publisher's site

    DOI
    10.1074/jbc.M112.435602
    Permanent Link to this Item
    http://hdl.handle.net/20.500.14038/35152
    PubMed ID
    23443666
    Related Resources

    Link to Article in PubMed

    Rights
    Copyright © 2013 by The American Society for Biochemistry and Molecular Biology, Inc. Publisher PDF posted after 12 months as allowed by the publisher's author rights policy at https://www.asbmb.org/journals-news/editorial-policies.
    ae974a485f413a2113503eed53cd6c53
    10.1074/jbc.M112.435602
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