Selective accumulation of pro-inflammatory T cells in the intestine contributes to the resistance to autoimmune demyelinating disease

PLoS One. 2014 Feb 4;9(2):e87876. doi: 10.1371/journal.pone.0087876. eCollection 2014.

Abstract

Myelin-specific, pro-inflammatory TH17 cells are widely regarded as the drivers of experimental autoimmune encephalomyelitis (EAE), an animal model for Multiple sclerosis (MS). The factors, responsible for the generation and maintenance of TH17 cells as well as their participation in the pathogenic cascade leading to the demyelinating disease, have been studied extensively. However, how these harmful autoreactive cells are controlled in vivo remains unclear. By comparing TCR transgenic mice on a disease susceptible and a disease resistant genetic background, we show here that pathogenic TH17 cells are sequestered within the intestine of spontaneous EAE resistant B10.S mice. Disease resistant B10.S mice harbored higher frequencies of TH17 cells in the intestine compared to EAE susceptible SJL/J mice. Moreover, transferred TH17 cells selectively migrated to intestinal lymphoid organs of B10.S mice. The sequestration of TH17 cells in the gut was partially dependent on the gut homing receptor α4β7-mediated adhesion to the intestine. Administration of α4β7 blocking-antibodies increased the peripheral availability of TH17 cells, resulting in increased EAE severity after immunization in B10.S mice. Together, these results support the concept that the intestine is a check-point for controlling pathogenic, organ-specific T cells.

Publication types

  • Research Support, Non-U.S. Gov't

MeSH terms

  • Animals
  • Antigen-Presenting Cells / immunology
  • Demyelinating Autoimmune Diseases, CNS / genetics
  • Demyelinating Autoimmune Diseases, CNS / immunology*
  • Disease Models, Animal
  • Disease Resistance / genetics
  • Disease Resistance / immunology*
  • Encephalomyelitis, Autoimmune, Experimental / immunology
  • Histocompatibility Antigens Class II / immunology
  • Integrins / metabolism
  • Intestinal Mucosa / metabolism
  • Intestines / immunology*
  • Lymphocyte Activation / immunology
  • Lymphoid Tissue / immunology
  • Mice
  • Mice, Transgenic
  • Myelin-Oligodendrocyte Glycoprotein / immunology
  • Receptors, Antigen, T-Cell / genetics
  • T-Cell Antigen Receptor Specificity / immunology
  • T-Lymphocyte Subsets / immunology*
  • T-Lymphocyte Subsets / metabolism
  • Th17 Cells / immunology

Substances

  • Histocompatibility Antigens Class II
  • Integrins
  • Myelin-Oligodendrocyte Glycoprotein
  • Receptors, Antigen, T-Cell
  • integrin alpha4beta7

Grants and funding

Laboratory work is supported by SFB 571 (Project B6), SFB TR 128 (Project A1), the German Competence Network on Multiple Sclerosis (KKNMS), Hertie foundation and by the Max Planck Society. The funders had no role in study design, data collection and analysis, decision to publish, or preparation of the manuscript.