IL-33 activates B1 cells and exacerbates contact sensitivity

Komai-Koma, M., Gilchrist, D. S., McKenzie, A. N. J., Goodyear, C. S. , Xu, D. and Liew, F. Y. (2011) IL-33 activates B1 cells and exacerbates contact sensitivity. Journal of Immunology, 186(4), pp. 2584-2591. (doi: 10.4049/jimmunol.1002103)

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B1 B cells produce natural IgM and play a critical role in the early defense against bacterial and viral infection. The polyreactive IgM also contributes to the clearance of apoptotic products and plays an important role in autoimmune pathogenesis. However, the mechanism of activation and proliferation of B1 cells remains obscure. In this study, we report that IL-33, a new member of IL-1 family, activates B1 cells, which express the IL-33 receptor alpha, ST2. IL-33 markedly activated B1 cell proliferation and enhanced IgM, IL-5, and IL-13 production in vitro and in vivo in a ST2-dependent manner. The IL-33-activated B1 cell functions could be largely abolished by IL-5 neutralization and partially reduced by T cell or mast cell deficiency in vivo. ST2-deficient mice developed less severe oxazolone-induced contact sensitivity (CS) than did wild-type (WT) mice. Furthermore, IL-33 treatment significantly exacerbated CS in WT mice with enhanced B1 cell proliferation and IgM and IL-5 production. Moreover, IL-33-activated B1 cells from WT mice could adoptively transfer enhanced CS in ST2(-/-) mice challenged with IL-33. Thus, we demonstrate, to the best of our knowledge, a hitherto unrecognized mechanism of B1 cell activation and IL-33 function, and suggest that IL-33 may play an important role in delayed-type hypersensitivity.

Item Type:Articles
Glasgow Author(s) Enlighten ID:Liew, Prof Foo and Xu, Dr Damo and Gilchrist, Dr Derek and Komai-Koma, Dr Mousa and Goodyear, Professor Carl
Authors: Komai-Koma, M., Gilchrist, D. S., McKenzie, A. N. J., Goodyear, C. S., Xu, D., and Liew, F. Y.
College/School:College of Medical Veterinary and Life Sciences > School of Infection & Immunity
Journal Name:Journal of Immunology
Journal Abbr.:J. Immunol.
Publisher:American Association of Immunologists
ISSN (Online):1550-6606
Published Online:14 January 2011
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Project CodeAward NoProject NamePrincipal InvestigatorFunder's NameFunder RefLead Dept
486461The role of IL-35 in infection and inflammationFoo LiewMedical Research Council (MRC)G0801198Infection Immunity and Inflammation Medicine