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• W1990209583 abstract "Abstract Background Human natural killer (NK) cells are the key contributors of innate immune response and the effector functions of these cells are enhanced by cytokines such as interleukine 2 (IL2). We utilized genome-wide transcriptional profiling to identify gene expression signatures and pathways in resting and IL2 activated NK cell isolated from peripheral blood of healthy donors. Results Gene expression profiling of resting NK cells showed high expression of a number of cytotoxic factors, cytokines, chemokines and inhibitory and activating surface NK receptors. Resting NK cells expressed many genes associated with cellular quiescence and also appeared to have an active TGFβ (TGFB1) signaling pathway. IL2 stimulation induced rapid downregulation of quiescence associated genes and upregulation of genes associated with cell cycle progression and proliferation. Numerous genes that may enhance immune function and responsiveness including activating receptors ( DNAM1, KLRC1 and KLRC3 ), death receptor ligand ( TNFSF6 (FASL ) and TRAIL ), chemokine receptors ( CX3CR1, CCR5 and CCR7 ), interleukin receptors ( IL2RG, IL18RAB and IL27RA ) and members of secretory pathways ( DEGS1, FKBP11, SSR3, SEC61G and SLC3A2 ) were upregulated. The expression profile suggested PI3K/AKT activation and NF-κB activation through multiple pathways (TLR/IL1R, TNF receptor induced and TCR-like possibly involving BCL10). Activation of NFAT signaling was supported by increased expression of many pathway members and downstream target genes. The transcription factor GATA3 was expressed in resting cells while T-BET was upregulated on activation concurrent with the change in cytokine expression profile. The importance of NK cells in innate immune response was also reflected by late increased expression of inflammatory chemotactic factors and receptors and molecules involved in adhesion and lymphocyte trafficking or migration. Conclusion This analysis allowed us to identify genes implicated in cellular quiescence and the cytokines and cytotoxic factors ready for immediate immune response. It also allowed us to observe the sequential immunostimulatory effects of IL2 on NK cells improving our understanding of the biology and molecular mediators behind NK cell activation." @default.
• W1990209583 created "2016-06-24" @default.
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• W1990209583 date "2007-07-10" @default.
• W1990209583 modified "2023-10-18" @default.
• W1990209583 title "Genome wide transcriptional analysis of resting and IL2 activated human natural killer cells: gene expression signatures indicative of novel molecular signaling pathways" @default.
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• W1990209583 doi "https://doi.org/10.1186/1471-2164-8-230" @default.
• W1990209583 hasPubMedCentralId "https://www.ncbi.nlm.nih.gov/pmc/articles/1959522" @default.
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