Fibroblastic reticular cells enhance T cell metabolism and survival via epigenetic remodeling

Nat Immunol. 2019 Dec;20(12):1668-1680. doi: 10.1038/s41590-019-0515-x. Epub 2019 Oct 21.

Abstract

Lymph node fibroblastic reticular cells (FRCs) respond to signals from activated T cells by releasing nitric oxide, which inhibits T cell proliferation and restricts the size of the expanding T cell pool. Whether interactions with FRCs also support the function or differentiation of activated CD8+ T cells is not known. Here we report that encounters with FRCs enhanced cytokine production and remodeled chromatin accessibility in newly activated CD8+ T cells via interleukin-6. These epigenetic changes facilitated metabolic reprogramming and amplified the activity of pro-survival pathways through differential transcription factor activity. Accordingly, FRC conditioning significantly enhanced the persistence of virus-specific CD8+ T cells in vivo and augmented their differentiation into tissue-resident memory T cells. Our study demonstrates that FRCs play a role beyond restricting T cell expansion-they can also shape the fate and function of CD8+ T cells.

Publication types

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

MeSH terms

  • Animals
  • CD8-Positive T-Lymphocytes / immunology*
  • Cell Differentiation
  • Cell Proliferation
  • Cell Survival
  • Cells, Cultured
  • Cellular Reprogramming
  • Chromatin Assembly and Disassembly
  • Cytotoxicity, Immunologic
  • Epigenesis, Genetic
  • Fibroblasts / physiology*
  • Gene Expression Regulation
  • Immunologic Memory
  • Interleukin-6 / genetics
  • Interleukin-6 / metabolism
  • Lymph Nodes / immunology*
  • Lymphocyte Activation
  • Mice
  • Mice, Inbred C57BL
  • Mice, Knockout
  • Nitric Oxide / metabolism

Substances

  • Interleukin-6
  • Nitric Oxide