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| Content Provider | World Health Organization (WHO)-Global Index Medicus |
|---|---|
| Author | Iijima, Koji Elias, Martha K. Kobayashi, Takao Hara, Kenichiro Kurabayashi, Masahiko Seno, Satoshi Kita, Hirohito Tojima, Ichiro Kephart, Gail M. |
| Description | Author Affiliation: Hara K ( Division of Allergic Diseases, Department of Internal Medicine, Mayo Clinic, Rochester, MN 55905) |
| Abstract | Although type 2 immune responses to environmental Ags are thought to play pivotal roles in asthma and allergic airway diseases, the immunological mechanisms that initiate the responses are largely unknown. Many allergens have biologic activities, including enzymatic activities and abilities to engage innate pattern-recognition receptors such as TLR4. In this article, we report that IL-33 and thymic stromal lymphopoietin were produced quickly in the lungs of naive mice exposed to cysteine proteases, such as bromelain and papain, as a model for allergens. IL-33 and thymic stromal lymphopoietin sensitized naive animals to an innocuous airway Ag OVA, which resulted in production of type 2 cytokines and IgE Ab, and eosinophilic airway inflammation when mice were challenged with the same Ag. Importantly, upon exposure to proteases, uric acid (UA) was rapidly released into the airway lumen, and removal of this endogenous UA by uricase prevented type 2 immune responses. UA promoted secretion of IL-33 by airway epithelial cells in vitro, and administration of UA into the airways of naive animals induced extracellular release of IL-33, followed by both innate and adaptive type 2 immune responses in vivo. Finally, a potent UA synthesis inhibitor, febuxostat, mitigated asthma phenotypes that were caused by repeated exposure to natural airborne allergens. These findings provide mechanistic insights into the development of type 2 immunity to airborne allergens and recognize airway UA as a key player that regulates the process in respiratory mucosa. |
| ISSN | 00221767 |
| e-ISSN | 15506606 |
| DOI | 10.4049/jimmunol.1400110 |
| Journal | The Journal of Immunology |
| Issue Number | 9 |
| Volume Number | 192 |
| Language | English |
| Publisher | The American Association of Immunologists |
| Publisher Date | 2014-05-01 |
| Publisher Place | United States |
| Access Restriction | Open |
| Subject Keyword | Adaptive Immunity Immunology Allergens Peptide Hydrolases Respiratory Mucosa Uric Acid Animals Bromelains Pharmacology Cytokines Biosynthesis Disease Models, Animal Enzyme-linked Immunosorbent Assay Flow Cytometry Interleukin-33 Interleukins Mice Mice, Inbred Balb C Mice, Inbred C57bl Mice, Knockout Microscopy, Confocal Papain Pneumonia Metabolism Th2 Cells Research Support, N.i.h., Extramural Research Support, Non-u.s. Gov't Discipline Immunology |
| Content Type | Text |
| Resource Type | Article |
| Subject | Immunology and Allergy Immunology |
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