Thymic stromal lymphopoietin-dependent basophils promote Th2 cytokine responses following intestinal helminth infection

Journal Publication ResearchOnline@JCU
Giacomin, Paul R.;Siracusa, Mark C.;Walsh, Kevin P.;Grencis, Richard K.;Kubo, Masato;Comeau, Michael R.;Artis, David
Abstract

CD4+ Th2 cytokine responses promote the development of allergic inflammation and are critical for immunity to parasitic helminth infection. Recent studies highlighted that basophils can promote Th2 cytokine-mediated inflammation and that phenotypic and functional heterogeneity exists between classical IL-3–elicited basophils and thymic stromal lymphopoietin (TSLP)-elicited basophils. However, whether distinct basophil populations develop after helminth infection and their relative contributions to anti-helminth immune responses remain to be defined. After Trichinella spiralis infection of mice, we show that basophil responses are rapidly induced in multiple tissue compartments, including intestinal-draining lymph nodes. Trichinella-induced basophil responses were IL-3–IL-3R independent but critically dependent on TSLP–TSLPR interactions. Selective depletion of basophils after Trichinella infection impaired infection-induced CD4+ Th2 cytokine responses, suggesting that TSLP-dependent basophils augment Th2 cytokine responses after helminth infection. The identification and functional classification of TSLP-dependent basophils in a helminth infection model, coupled with their recently described role in promoting atopic dermatitis, suggests that these cells may be a critical population in promoting Th2 cytokine-associated inflammation in a variety of inflammatory or infectious settings. Collectively, these data suggest that the TSLP–basophil pathway may represent a new target in the design of therapeutic intervention strategies to promote or limit Th2 cytokine-dependent immunity and inflammation.

Journal

Journal of Immunology

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Volume

189

ISBN/ISSN

1550-6606

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Issue

9

Pages Count

8

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Publisher

American Association of Immunologists

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DOI

10.4049/​jimmunol.1200691