TSLP elicits IL-33-independent innate lymphoid cell responses to promote skin inflammation

Brian S. Kim, Mark C. Siracusa, Steven A. Saenz, Mario Noti, Laurel A. Monticelli, Gregory F. Sonnenberg, Matthew R. Hepworth, Abby S. Van Voorhees, Michael R. Comeau, David Artis

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424 Scopus citations

Abstract

Innate lymphoid cells (ILCs) are a recently identified family of heterogeneous immune cells that can be divided into three groups based on their differential developmental requirements and expression of effector cytokines. Among these, group 2 ILCs produce the type 2 cytokines interleukin-5 (IL-5) and IL-13 and promote type 2 inflammation in the lung and intestine. However, whether group 2 ILCs reside in the skin and contribute to skin inflammation has not been characterized. We identify a population of skin-resident group 2 ILCs present in healthy human skin that are enriched in lesional human skin from atopic dermatitis (AD) patients. Group 2 ILCs were also found in normal murine skin and were critical for the development of inflammation in a murine model of AD-like disease. Remarkably, in contrast to group 2 ILC responses in the intestine and lung, which are critically regulated by IL-33 and IL-25, group 2 ILC responses in the skin and skin-draining lymph nodes were independent of these canonical cytokines but were critically dependent on thymic stromal lymphopoietin (TSLP). Collectively, these results demonstrate an essential role for IL-33- and IL-25-independent group 2 ILCs in promoting skin inflammation.

Original languageEnglish
Article number170ra16
JournalScience translational medicine
Volume5
Issue number170
DOIs
StatePublished - Jan 30 2013

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