Inflammation-induced IgA+ cells dismantle anti-liver cancer immunity

Nature. 2017 Nov 16;551(7680):340-345. doi: 10.1038/nature24302. Epub 2017 Nov 8.

Abstract

The role of adaptive immunity in early cancer development is controversial. Here we show that chronic inflammation and fibrosis in humans and mice with non-alcoholic fatty liver disease is accompanied by accumulation of liver-resident immunoglobulin-A-producing (IgA+) cells. These cells also express programmed death ligand 1 (PD-L1) and interleukin-10, and directly suppress liver cytotoxic CD8+ T lymphocytes, which prevent emergence of hepatocellular carcinoma and express a limited repertoire of T-cell receptors against tumour-associated antigens. Whereas CD8+ T-cell ablation accelerates hepatocellular carcinoma, genetic or pharmacological interference with IgA+ cell generation attenuates liver carcinogenesis and induces cytotoxic T-lymphocyte-mediated regression of established hepatocellular carcinoma. These findings establish the importance of inflammation-induced suppression of cytotoxic CD8+ T-lymphocyte activation as a tumour-promoting mechanism.

Publication types

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

MeSH terms

  • Animals
  • B7-H1 Antigen / metabolism
  • CD8 Antigens / deficiency
  • Carcinoma, Hepatocellular / etiology
  • Carcinoma, Hepatocellular / immunology*
  • Carcinoma, Hepatocellular / pathology
  • Cell Proliferation
  • Clone Cells / cytology
  • Clone Cells / immunology
  • Disease Progression
  • Female
  • Gastrointestinal Microbiome
  • Humans
  • Immune Tolerance / immunology*
  • Immunoglobulin A / immunology*
  • Immunoglobulin A / metabolism
  • Inflammation / etiology
  • Inflammation / immunology*
  • Inflammation / pathology
  • Interleukin-10 / metabolism
  • Liver Cirrhosis / complications
  • Liver Cirrhosis / immunology
  • Liver Cirrhosis / metabolism
  • Liver Cirrhosis / pathology
  • Liver Neoplasms / etiology
  • Liver Neoplasms / immunology*
  • Liver Neoplasms / pathology
  • Lymphocyte Activation
  • Male
  • Mice
  • Non-alcoholic Fatty Liver Disease / complications*
  • Non-alcoholic Fatty Liver Disease / immunology*
  • Non-alcoholic Fatty Liver Disease / metabolism
  • Non-alcoholic Fatty Liver Disease / pathology
  • Plasma Cells / immunology
  • Plasma Cells / metabolism
  • T-Lymphocytes, Cytotoxic / cytology
  • T-Lymphocytes, Cytotoxic / immunology

Substances

  • B7-H1 Antigen
  • CD8 Antigens
  • CD8 antigen, alpha chain
  • Immunoglobulin A
  • Interleukin-10