Molecular and functional heterogeneity of IL-10-producing CD4 + T cells

Nat Commun. 2018 Dec 21;9(1):5457. doi: 10.1038/s41467-018-07581-4.

Abstract

IL-10 is a prototypical anti-inflammatory cytokine, which is fundamental to the maintenance of immune homeostasis, especially in the intestine. There is an assumption that cells producing IL-10 have an immunoregulatory function. However, here we report that IL-10-producing CD4+ T cells are phenotypically and functionally heterogeneous. By combining single cell transcriptome and functional analyses, we identified a subpopulation of IL-10-producing Foxp3neg CD4+ T cells that displays regulatory activity unlike other IL-10-producing CD4+ T cells, which are unexpectedly pro-inflammatory. The combinatorial expression of co-inhibitory receptors is sufficient to discriminate IL-10-producing CD4+ T cells with regulatory function from others and to identify them across different tissues and disease models in mice and humans. These regulatory IL-10-producing Foxp3neg CD4+ T cells have a unique transcriptional program, which goes beyond the regulation of IL-10 expression. Finally, we found that patients with Inflammatory Bowel Disease demonstrate a deficiency in this specific regulatory T-cell subpopulation.

Publication types

  • Research Support, Non-U.S. Gov't

MeSH terms

  • Animals
  • CD4-Positive T-Lymphocytes / metabolism*
  • Humans
  • Inflammatory Bowel Diseases / immunology*
  • Interleukin-10 / metabolism*
  • Mice, Inbred C57BL
  • Single-Cell Analysis
  • Transcriptome

Substances

  • IL10 protein, human
  • IL10 protein, mouse
  • Interleukin-10