Mouse cytomegalovirus-experienced ILC1s acquire a memory response dependent on the viral glycoprotein m12

Nat Immunol. 2019 Aug;20(8):1004-1011. doi: 10.1038/s41590-019-0430-1. Epub 2019 Jul 1.

Abstract

Innate lymphoid cells (ILCs) are tissue-resident sentinels that are essential for early host protection from pathogens at initial sites of infection. However, whether pathogen-derived antigens directly modulate the responses of tissue-resident ILCs has remained unclear. In the present study, it was found that liver-resident type 1 ILCs (ILC1s) expanded locally and persisted after the resolution of infection with mouse cytomegalovirus (MCMV). ILC1s acquired stable transcriptional, epigenetic and phenotypic changes a month after the resolution of MCMV infection, and showed an enhanced protective effector response to secondary challenge with MCMV consistent with a memory lymphocyte response. Memory ILC1 responses were dependent on the MCMV-encoded glycoprotein m12, and were independent of bystander activation by proinflammatory cytokines after heterologous infection. Thus, liver ILC1s acquire adaptive features in an MCMV-specific manner.

Publication types

  • Research Support, N.I.H., Extramural
  • Research Support, Non-U.S. Gov't

MeSH terms

  • Animals
  • Herpesviridae Infections / immunology
  • Herpesviridae Infections / virology
  • Immunity, Innate / immunology
  • Immunologic Memory / immunology*
  • Interleukin-18 Receptor alpha Subunit / metabolism
  • Liver / cytology
  • Liver / immunology*
  • Lymphocytes / immunology*
  • Membrane Glycoproteins / immunology*
  • Mice
  • Muromegalovirus / immunology*
  • Viral Envelope Proteins / immunology*

Substances

  • IL18R1 protein, human
  • Interleukin-18 Receptor alpha Subunit
  • M12 protein, Mouse mammary tumor virus
  • Membrane Glycoproteins
  • Viral Envelope Proteins