NDLI: Nippostrongylus-Induced Intestinal Hypercontractility Requires IL-4 Receptor Alpha-Responsiveness by T Cells in Mice

Content Provider	PubMed Central
Author	Schmidt, Saskia Hoving, J. Claire Horsnell, William G. C. Mearns, Helen Cutler, Antony J. Brombacher, Tiroyaone M. Frank, Brombacher
Editor	Moraes, Maria Leite De
Copyright Year	2012
Abstract	Gut-dwelling helminthes induce potent IL-4 and IL-13 dominated type 2 T helper cell (TH2) immune responses, with IL-13 production being essential for Nippostrongylus brasiliensis expulsion. This TH2 response results in intestinal inflammation associated with local infiltration by T cells and macrophages. The resulting increased IL-4/IL-13 intestinal milieu drives goblet cell hyperplasia, alternative macrophage activation and smooth muscle cell hypercontraction. In this study we investigated how IL-4-promoted T cells contributed to the parasite induced effects in the intestine. This was achieved using pan T cell-specific IL-4 receptor alpha-deficient mice (iLckcreIL-4Rα−/lox) and IL-4Rα-responsive control mice. Global IL-4Rα−/− mice showed, as expected, impaired type 2 immunity to N. brasiliensis. Infected T cell-specific IL-4Rα-deficient mice showed comparable worm expulsion, goblet cell hyperplasia and IgE responses to control mice. However, impaired IL-4-promoted TH2 cells in T cell-specific IL-4Rα deficient mice led to strikingly reduced IL-4 production by mesenteric lymph node CD4+ T cells and reduced intestinal IL-4 and IL-13 levels, compared to control mice. This reduced IL-4/IL-13 response was associated with an impaired IL-4/IL-13-mediated smooth muscle cell hypercontractility, similar to that seen in global IL-4Rα−/− mice. These results demonstrate that IL-4-promoted T cell responses are not required for the resolution of a primary N. brasiliensis infection. However, they do contribute significantly to an important physiological manifestation of helminth infection; namely intestinal smooth muscle cell-driven hypercontractility.
Related Links	http://dx.doi.org/10.1371/journal.pone.0052211
Starting Page	52211
File Format	PDF
ISSN	19326203
e-ISSN	19326203
Journal	PLoS ONE
Issue Number	12
Volume Number	7
Language	English
Publisher	Public Library of Science
Publisher Date	2012-12-01
Access Restriction	Open
Rights Holder	Public Library of Science
Subject Keyword	Biochemistry, Genetics and Molecular Biology(all) Agricultural and Biological Sciences(all) Medicine(all) Research in Higher Education
Content Type	Text
Resource Type	Article
Subject	Multidisciplinary

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