Human IL-25- and IL-33-responsive type 2 innate lymphoid cells are defined by expression of CRTH2 and CD161

Jenny M. Mjösberg, Sara Trifari, Natasha K. Crellin, Charlotte P. Peters, Cornelis M. van Drunen, Berber Piet, Wytske J. Fokkens, Tom Cupedo, Hergen Spits

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Abstract

Innate lymphoid cells (ILCs) are emerging as a family of effectors and regulators of innate immunity and tissue remodeling. Interleukin 22 (IL-22)- and IL-17-producing ILCs, which depend on the transcription factor RORγt, express CD127 (IL-7 receptor α-chain) and the natural killer cell marker CD161. Here we describe another lineage-negative CD127(+)CD161(+) ILC population found in humans that expressed the chemoattractant receptor CRTH2. These cells responded in vitro to IL-2 plus IL-25 and IL-33 by producing IL-13. CRTH2(+) ILCs were present in fetal and adult lung and gut. In fetal gut, these cells expressed IL-13 but not IL-17 or IL-22. There was enrichment for CRTH2(+) ILCs in nasal polyps of chronic rhinosinusitis, a typical type 2 inflammatory disease. Our data identify a unique type of human ILC that provides an innate source of T helper type 2 (T(H)2) cytokines
Original languageEnglish
Pages (from-to)1055-1062
JournalNature immunology
Volume12
Issue number11
DOIs
Publication statusPublished - 2011

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