Acute infection with the intestinal parasite Trichuris muris has long-term consequences on mucosal mast cell homeostasis and epithelial integrity

Research output: Contribution to journalArticle

Abstract

A hallmark of parasite infection is the accumulation of innate immune cells, notably granulocytes and mast cells, at the site of infection. While this is typically viewed as a transient response, with the tissue returning to steady state once the infection is cleared, we found that mast cells accumulated in the large-intestinal epithelium following infection with the nematode Trichuris muris and persisted at this site for several months after worm expulsion. Mast cell accumulation in the epithelium was associated with the induction of type-2 immunity and appeared to be driven by increased maturation of local progenitors in the intestinal lamina propria. Furthermore, we also detected increased local and systemic levels of the mucosal mast cell protease MCPt-1, which correlated highly with the persistent epithelial mast cell population. Finally, the mast cells appeared to have striking consequences on epithelial barrier integrity, by regulation of gut permeability long after worm expulsion. These findings highlight the importance of mast cells not only in the early phases of infection but also at later stages, which has functional implications on the mucosal tissue.

Details

Authors
  • Daniel Sorobetea
  • Jacob Bak Holm
  • Henrietta Henningsson
  • Karsten Kristiansen
  • Marcus Svensson-Frej
Organisations
External organisations
  • University of Copenhagen
Research areas and keywords

Subject classification (UKÄ) – MANDATORY

  • Immunology in the medical area

Keywords

  • Acute parasite infection, Large-intestinal epithelium, MCPt-1, Mucosal mast cell, Trichuris muris
Original languageEnglish
Pages (from-to)257-268
JournalEuropean Journal of Immunology
Volume47
Issue number2
Publication statusPublished - 2017
Publication categoryResearch
Peer-reviewedYes

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Daniel Sorobetea, 2017, Lund: Lund University: Faculty of Medicine. 77 p.

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