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IgE sensitization to fungi mirrors fungal phylogenetic systematics
Uppsala University, Disciplinary Domain of Medicine and Pharmacy, Faculty of Medicine, Department of Medical Sciences.
2010 (English)In: Journal of Allergy and Clinical Immunology, ISSN 0091-6749, E-ISSN 1097-6825, Vol. 125, no 6, 1379-1386 p.Article in journal (Refereed) Published
Abstract [en]

Background: Fungal allergy is an elusive disease, and little progress has been made in this field during recent years. Moreover, because of the complexity of the organisms, it is difficult to categorize fungi systematically on the basis of morphologic characterization. However, recent molecular phylogenetics studies have substantially improved fungal categorization. In parallel, new approaches to analyze large IgE antibody datasets enable identification and visualization of IgE sensitization patterns. Objective: To study whether molecular phylogenetic relationships of fungal species, commonly used in allergy diagnosis, also are reflected in IgE sensitization profiles of individuals sensitized to fungi. Methods: A dataset was compiled of recorded serum IgE antibody levels to 17 different fungal species from 668 individuals sensitized to at least I of the 17 species. By applying a clustering method to this dataset, the fungal species were grouped into a hierarchical organization. Finally, the resulting organization was compared with recently published fungal systematics. Results: The hierarchical structure of fungi, based on the presence of IgE antibodies in sensitized individuals, very well reflected phylogenetic relationships. Examples include the distinct separation of basal fungi from the subkingdom Dikarya as well as individual cluster formations of fungi belonging to the subphylum Saccharomycotina and order Pleosporales. Conclusion: To our knowledge, this is the first in-depth study that demonstrates a close relationship between molecular fungal systematics and IgE sensitization to fungal species. Because close evolutionary organisms typically have a higher degree of protein similarity, IgE cross-reactivity is likely the main reason for obtained organization. (J Allergy Clin Immunol 2010;125:1379-86.)

Place, publisher, year, edition, pages
2010. Vol. 125, no 6, 1379-1386 p.
Keyword [en]
Hierarchical clustering, fungal allergy, IgE sensitization, fungal systematics
National Category
Medical and Health Sciences
URN: urn:nbn:se:uu:diva-136271DOI: 10.1016/j.jaci.2010.02.028ISI: 000278831000028OAI: oai:DiVA.org:uu-136271DiVA: diva2:376558
Available from: 2010-12-11 Created: 2010-12-11 Last updated: 2010-12-11Bibliographically approved

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