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BRIEF DEFINITIVE REPORT |
CORRESPONDENCE David Artis: dartis{at}vet.upenn.edu OR Nico Ghilardi: ghilardi.nico{at}gene.com
Interleukin (IL) 31R
(glycoprotein 130like monocyte receptor and glycoprotein 130like receptor) heterodimerizes with oncostatin M receptor ß to bind IL-31, a cytokine expressed preferentially by CD4+ T helper type 2 (Th2) cells. However, the functions of IL-31IL-31R signaling in immune regulation remain unknown. Here, we identify a novel role for IL-31R in limiting type 2 inflammation in the lung. After intravenous injection of Schistosoma mansoni eggs, IL-31R
/ mice developed severe pulmonary inflammation, characterized by an increase in the area of granulomatous inflammation, increased numbers of resistin-like molecule
+ cells, and enhanced collagen deposition compared to WT counterparts. In vitro, macrophages generated from IL-31R
/ mice promoted enhanced ovalbumin-specific CD4+ T cell proliferation and purified naive CD4+ T cells from IL-31R
/ mice exhibited enhanced proliferation and expression of Th2 cytokines, identifying a T cell and macrophage-intrinsic regulatory function for IL-31R signaling. In contrast, the generation of CD4+ T cellmediated Th1 responses were normal in IL-31R
/ mice, suggesting that the regulatory role of IL-31R signaling is limited to type 2 responses. Together, these data implicate IL-31R signaling as a novel negative regulatory pathway that specifically limits type 2 inflammation.
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