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.
journal_name
Eur J Immunoljournal_title
European journal of immunologyauthors
Sorobetea D,Holm JB,Henningsson H,Kristiansen K,Svensson-Frej Mdoi
10.1002/eji.201646738subject
Has Abstractpub_date
2017-02-01 00:00:00pages
257-268issue
2eissn
0014-2980issn
1521-4141journal_volume
47pub_type
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