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A key requirement for CD300f in innate immune responses of eosinophils in colitis
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- Moshkovits, I. (author)
- Tel Aviv Univ, Dept Clin Microbiol & Immunol, Sackler Fac Med, Tel Aviv, Israel.
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- Reichman, H. (author)
- Tel Aviv Univ, Dept Clin Microbiol & Immunol, Sackler Fac Med, Tel Aviv, Israel.
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- Karo-Atar, D. (author)
- Tel Aviv Univ, Dept Clin Microbiol & Immunol, Sackler Fac Med, Tel Aviv, Israel.
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- Tel Aviv Univ, Dept Clin Microbiol & Immunol, Sackler Fac Med, Tel Aviv, Israel Tel Aviv Univ, Sourasky Med Ctr, Res Ctr Digest Tract & Liver Dis, Tel Aviv, Israel.;Tel Aviv Univ, Sackler Fac Med, Tel Aviv, Israel. (creator_code:org_t)
- Elsevier BV, 2017
- 2017
- English.
- In: Mucosal Immunology. - : Elsevier BV. - 1933-0219 .- 1935-3456. ; 10:1, s. 172-183
- Journal article (peer-reviewed)
Abstract
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- Eosinophils are traditionally studied in the context of type 2 immune responses. However, recent studies highlight key innate immune functions for eosinophils especially in colonic inflammation. Surprisingly, molecular pathways regulating innate immune activities of eosinophil are largely unknown. Wehave recently shown that the CD300f is highly expressed by colonic eosinophils. Nonetheless, the role of CD300f in governing innate immune eosinophil activities is ill-defined. RNA sequencing of 162 pediatric Crohn's disease patients revealed upregulation of multiple Cd300 family members, which correlated with the presence of severe ulcerations and inflammation. Increased expression of CD300 family receptors was also observed in active ulcerative colitis (UC) and in mice following induction of experimental colitis. Specifically, the expression of CD300f was dynamically regulated in monocytes and eosinophils. Dextran sodium sulfate (DSS)-treated Cd300f (-/-) mice exhibit attenuated disease activity and histopathology in comparison with DSS-treated wild type (WT). Decreased disease activity in Cd300f (-/-) mice was accompanied with reduced inflammatory cell infiltration and nearly abolished production of pro-inflammatory cytokines. Monocyte depletion and chimeric bone marrow transfer experiments revealed a cell-specific requirement for CD300f in innate immune activation of eosinophils. Collectively, we uncover a new pathway regulating innate immune activities of eosinophils, a finding with significant implications in eosinophil-associated gastrointestinal diseases.
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- Rozenberg, P.
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- Lampinen, Maria
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