Abstract:
BACKGROUND:Atopic eczema/dermatitis syndrome (AEDS) patients display immunoglobulin E (IgE) reactivity to several antigens, e.g. saprophytic yeasts as Malassezia furfur. AEDS patients also show IgE autoreactivity towards cells of their own tissue including epidermis. PURPOSE OF THE STUDY:The aim of this study was to investigate the IgE autoreactivity of AEDS patients to cultured keratinocytes and to reveal potential crossreacting epitopes in cultured keratinocytes and M. furfur. MATERIAL AND METHODS:Serum samples of 27 AEDS patients were analyzed, of these 13 were M. furfur radioallergosorbent test (RAST) positive and 14 negative. Four urticaria, three psoriasis, and seven nonatopic patients were included as controls. The studies were performed by using IgE immunoblotting and immunoblotting inhibition methods. RESULTS:Ten IgE-binding protein bands were detected in cultured human keratinocytes by IgE immunoblotting using sera from adult AEDS patients. Anti-keratinocyte IgE antibodies were more associated with elevated S-IgE level than M. furfur RAST. Clear crossreactivity with M. furfur could not be shown. CONCLUSIONS:The possible pathomechanism of anti-keratinocyte IgE antibodies is not due to IgE epitope mimicry of saprophytic yeast and local tissue in AEDS skin.
journal_name
Allergyjournal_title
Allergyauthors
Kortekangas-Savolainen O,Peltonen S,Pummi K,Kalimo K,Savolainen Jdoi
10.1046/j.1398-9995.2003.00330.xkeywords:
subject
Has Abstractpub_date
2004-02-01 00:00:00pages
168-73issue
2eissn
0105-4538issn
1398-9995pii
330journal_volume
59pub_type
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