The deubiquitinase Otub1 controls the activation of CD8 + T cells and NK cells by regulating IL-15-mediated priming.

Autor: Zhou X; Department of Immunology, University of Texas MD Anderson Cancer Center, Houston, TX, USA., Yu J; Department of Immunology, University of Texas MD Anderson Cancer Center, Houston, TX, USA.; Therapeutic Tumor Microenvironment Strategies, Pittsburgh, PA, USA., Cheng X; Department of Immunology, University of Texas MD Anderson Cancer Center, Houston, TX, USA., Zhao B; Department of Biochemistry and Biophysics, Texas A&M University, College Station, TX, USA., Manyam GC; Department of Bioinformatics and Computational Biology, University of Texas MD Anderson Cancer Center, Houston, TX, USA., Zhang L; Department of Bioinformatics and Computational Biology, University of Texas MD Anderson Cancer Center, Houston, TX, USA.; Department of Environmental Health, University of Cincinnati, Cincinnati, OH, USA., Schluns K; Department of Immunology, University of Texas MD Anderson Cancer Center, Houston, TX, USA.; University of Texas Graduate School of Biomedical Sciences, Houston, TX, USA., Li P; Department of Biochemistry and Biophysics, Texas A&M University, College Station, TX, USA., Wang J; Department of Bioinformatics and Computational Biology, University of Texas MD Anderson Cancer Center, Houston, TX, USA.; University of Texas Graduate School of Biomedical Sciences, Houston, TX, USA., Sun SC; Department of Immunology, University of Texas MD Anderson Cancer Center, Houston, TX, USA. ssun@mdanderson.org.; University of Texas Graduate School of Biomedical Sciences, Houston, TX, USA. ssun@mdanderson.org.
Jazyk: angličtina
Zdroj: Nature immunology [Nat Immunol] 2019 Jul; Vol. 20 (7), pp. 879-889. Date of Electronic Publication: 2019 Jun 10.
DOI: 10.1038/s41590-019-0405-2
Abstrakt: CD8 + T cells and natural killer (NK) cells are central cellular components of immune responses against pathogens and cancer, which rely on interleukin (IL)-15 for homeostasis. Here we show that IL-15 also mediates homeostatic priming of CD8 + T cells for antigen-stimulated activation, which is controlled by a deubiquitinase, Otub1. IL-15 mediates membrane recruitment of Otub1, which inhibits ubiquitin-dependent activation of AKT, a kinase that is pivotal for T cell activation and metabolism. Otub1 deficiency in mice causes aberrant responses of CD8 + T cells to IL-15, rendering naive CD8 + T cells hypersensitive to antigen stimulation characterized by enhanced metabolic reprograming and effector functions. Otub1 also controls the maturation and activation of NK cells. Deletion of Otub1 profoundly enhances anticancer immunity by unleashing the activity of CD8 + T cells and NK cells. These findings suggest that Otub1 controls the activation of CD8 + T cells and NK cells by functioning as a checkpoint of IL-15-mediated priming.
Databáze: MEDLINE
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