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| Content Provider | World Health Organization (WHO)-Global Index Medicus |
|---|---|
| Author | Reginald, Kavita Westritschnig, Kerstin Linhart, Birgit Focke-Tejkl, Margarete Jahn-Schmid, Beatrice Eckl-Dorna, Julia Heratizadeh, Annice Stöcklinger, Angelika Balic, Nadja Spitzauer, Susanne Niederberger, Verena Werfel, Thomas Thalhamer, Josef Weidinger, Stephan Novak, Natalija Ollert, Markus Hirschl, Alexander M. Valenta, Rudolf |
| Description | Country affiliation: Austria Author Affiliation: Reginald K ( Division of Immunopathology, Department of Pathophysiology and Allergy Research, Center for Pathophysiology, Infectiology and Immunology, Medical University of Vienna, Vienna, Austria.) |
| Abstract | BACKGROUND: Staphylococcus aureus superinfections occur in more than 90% of patients with atopic dermatitis (AD) and aggravate skin inflammation. S aureus toxins lead to tissue damage and augment T-cell-mediated skin inflammation by a superantigen effect. OBJECTIVE: To characterize IgE-reactive proteins from S aureus. METHODS: A genomic S aureus library was screened with IgE from patients with AD for DNA clones coding for IgE-reactive antigens. One was identified as fibronectin-binding protein (FBP). Recombinant FBP was expressed in Escherichia coli, purified, and tested for specific IgE reactivity in patients with AD. Its allergenic activity was studied in basophil activation experiments and T-cell cultures. The in vivo allergenic activity was investigated by sensitizing mice. RESULTS: Using IgE from patients with AD for screening of a genomic S aureus library, an IgE-reactive DNA clone was isolated that coded for FBP. Recombinant FBP was expressed in E coli and purified. It reacted specifically with IgE from patients with AD and exhibited allergenic activity in basophil degranulation assays. FBP showed specific T-cell reactivity requiring antigen presentation and induced the secretion of proinflammatory cytokines from PBMCs. Mice sensitized with FBP mounted FBP-specific IgE responses, showed FBP-specific basophil degranulation as well as FBP-specific T-cell proliferation, and mixed T(h)2/T(h)1 cytokine secretion. CONCLUSION: Evidence is provided that specific humoral and cellular immune responses to S aureus antigens dependent on antigen presentation represent a novel mechanism for S aureus-induced skin inflammation in AD. Furthermore, FBP may be used for the development of novel diagnostic and therapeutic strategies for S aureus infections. |
| File Format | HTM / HTML |
| ISSN | 00916749 |
| e-ISSN | 10976825 |
| Journal | Journal of Allergy and Clinical Immunology |
| Issue Number | 1 |
| Volume Number | 128 |
| Language | English |
| Publisher | Elsevier |
| Publisher Date | 2011-07-01 |
| Publisher Place | United States |
| Access Restriction | Open |
| Subject Keyword | Discipline Immunology Adhesins, Bacterial Immunology Antigen Presentation Dermatitis, Atopic Immunoglobulin E Staphylococcal Infections Staphylococcus Aureus Genetics Adolescent Amino Acid Sequence Animals Child, Preschool Microbiology Infant Mice Molecular Sequence Data Recombinant Proteins Superantigens Research Support, Non-u.s. Gov't |
| Content Type | Text |
| Resource Type | Article |
| Subject | Immunology and Allergy Immunology |
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