T-cell immunoglobulin and ITIM domain (TIGIT) receptor/poliovirus receptor (PVR) ligand engagement suppresses interferon-γ production of natural killer cells via β-arrestin 2-mediated negative signaling

J Biol Chem. 2014 Jun 20;289(25):17647-57. doi: 10.1074/jbc.M114.572420. Epub 2014 May 9.

Abstract

Natural killer (NK) cell activation is well orchestrated by a wide array of NK cell receptor repertoire. T-cell immunoglobulin and ITIM domain (TIGIT) receptor was recently defined as an inhibitory receptor that is expressed on NK cells and T cells. TIGIT receptor/poliovirus receptor (PVR) ligand engagement signaling inhibits cytotoxicity mediated by NK and CD8(+) T cells. However, it is unclear how TIGIT/PVR signaling regulates cytokine secretion in NK cells. Here we show that TIGIT/PVR engagement suppresses interferon-γ (IFN-γ) production of NK cells. TIGIT transgenic NK cells generate less IFN-γ undergoing TIGIT/PVR ligation. Moreover, TIGIT knock-out NK cells produce much more IFN-γ. TIGIT/PVR ligation signaling mediates suppression of IFN-γ production via the NF-κB pathway. We identified a novel adaptor β-arrestin 2 that associates with phosphorylated TIGIT for further recruitment of SHIP1 (SH2-containing inositol phosphatase 1) through the ITT-like motif. Importantly, SHIP1, but not other phosphatases, impairs the TNF receptor-associated factor 6 (TRAF6) autoubiquitination to abolish NF-κB activation, leading to suppression of IFN-γ production in NK cells.

Keywords: Immunology; Innate Immunity; Interferon; Natural Killer Cells (NK Cells); Signaling.

Publication types

  • Research Support, Non-U.S. Gov't

MeSH terms

  • Animals
  • Arrestins / genetics
  • Arrestins / immunology
  • Arrestins / metabolism*
  • CD8-Positive T-Lymphocytes / cytology
  • CD8-Positive T-Lymphocytes / immunology
  • CD8-Positive T-Lymphocytes / metabolism
  • Cell Line
  • Humans
  • Immunologic Capping / physiology
  • Inositol Polyphosphate 5-Phosphatases
  • Interferon-gamma / biosynthesis*
  • Interferon-gamma / genetics
  • Interferon-gamma / immunology
  • Killer Cells, Natural / cytology
  • Killer Cells, Natural / immunology
  • Killer Cells, Natural / metabolism*
  • Mice
  • Mice, Knockout
  • Phosphatidylinositol-3,4,5-Trisphosphate 5-Phosphatases
  • Phosphoric Monoester Hydrolases / genetics
  • Phosphoric Monoester Hydrolases / immunology
  • Phosphoric Monoester Hydrolases / metabolism
  • Receptors, Immunologic / genetics
  • Receptors, Immunologic / immunology
  • Receptors, Immunologic / metabolism*
  • Receptors, Virus / genetics
  • Receptors, Virus / immunology
  • Receptors, Virus / metabolism*
  • Signal Transduction / physiology*
  • TNF Receptor-Associated Factor 6 / genetics
  • TNF Receptor-Associated Factor 6 / metabolism
  • beta-Arrestin 2
  • beta-Arrestins

Substances

  • ARRB2 protein, human
  • Arrb2 protein, mouse
  • Arrestins
  • IFNG protein, human
  • Receptors, Immunologic
  • Receptors, Virus
  • T cell Ig and ITIM domain protein, mouse
  • TIGIT protein, human
  • TNF Receptor-Associated Factor 6
  • beta-Arrestin 2
  • beta-Arrestins
  • poliovirus receptor
  • Interferon-gamma
  • Phosphoric Monoester Hydrolases
  • Inositol Polyphosphate 5-Phosphatases
  • INPP5D protein, human
  • Inpp5d protein, mouse
  • Phosphatidylinositol-3,4,5-Trisphosphate 5-Phosphatases