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Immunoglobulin E antibody reactivity to bacterial antigens in atopic dermatitis patients.

AbstractBACKGROUND:
Atopic dermatitis (AD) is a chronic inflammatory skin disease affecting up to 20% children and 9% adults world-wide. AD patients are often sensitized against a broad variety of allergens and more than 90% of them suffer from skin superinfections with Staphylococcus aureus.
OBJECTIVE:
In this study, we searched for the presence of specific IgE antibodies against S. aureus and Escherichia coli antigens in AD patients.
METHODS:
Sera from AD patients (n=79), patients suffering only from allergic rhinoconjunctivitis (n=41) or allergic asthma (n=37) were tested for IgE reactivity to nitrocellulose-blotted S. aureus, E. coli and gut bacterial antigens. IgE-reactive bacterial antigens were affinity purified and identified by mass spectrometry.
RESULTS:
More than 30% of AD patients but not patients suffering only from allergic rhinoconjunctivitis and asthma or non-allergic persons exhibited IgE binding to several protein antigens among them DNA-binding and ribosomal proteins and flagellin. Patients with severe skin manifestations showed more frequently IgE reactivity to S. aureus compared with AD patients with mild symptoms. Positive immediate and late skin test reactions could be induced in sensitized AD patients with S. aureus extract.
CONCLUSION AND CLINICAL RELEVANCE:
Specific IgE reactivities against a variety of bacterial antigens were observed in a subgroup comprising a third of AD patients and may contribute to allergic inflammation.
AuthorsK Reginald, K Westritschnig, T Werfel, A Heratizadeh, N Novak, M Focke-Tejkl, A M Hirschl, D Y M Leung, O Elisyutina, E Fedenko, R Valenta
JournalClinical and experimental allergy : journal of the British Society for Allergy and Clinical Immunology (Clin Exp Allergy) Vol. 41 Issue 3 Pg. 357-69 (Mar 2011) ISSN: 1365-2222 [Electronic] England
PMID21155910 (Publication Type: Journal Article, Research Support, N.I.H., Extramural)
Copyright© 2010 Blackwell Publishing Ltd.
Chemical References
  • Antibodies, Bacterial
  • Antigens, Bacterial
  • Immunoglobulin E
Topics
  • Adult
  • Aged
  • Aged, 80 and over
  • Antibodies, Bacterial (blood, immunology)
  • Antigens, Bacterial (immunology)
  • Dermatitis, Atopic (blood, immunology)
  • Escherichia coli (immunology)
  • Female
  • Humans
  • Immunoblotting
  • Immunoglobulin E (blood, immunology)
  • Male
  • Mass Spectrometry
  • Middle Aged
  • Skin Tests
  • Staphylococcus aureus (immunology)
  • Young Adult

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