Wednesday, 7 December 2011: 13:15 - 13:30
Cozumel 2 (Cancún Center)
Liliana Cifuentes, MD
,
Dermatology and Allergy, Clinical Research Division of Molecular and Clinical Allergotoxicology, Department of Dermatology and Allergy, Technical University Munich, Germany, Munich, Germany
Lukas Balzer, MD
,
Clinical Research Division of Molecular and Clinical Allergotoxicology, Department of Dermatology and Allergy, Technical University Munich, Germany, Munich, Germany
Blank Simon, PhD
,
Institute of Biochemistry and Molecular Biology, Department of Chemistry, University of Hamburg, Germany., Hamburg, Germany
Henning Seismann, PhD
,
Institute of Biochemistry and Molecular Biology, Department of Chemistry, University of Hamburg, Hamburg, Germany
Ulf Darsow
,
Department of Dermatology and Allergy Biederstein, Technische Universitaet Muenchen, Munich, Germany
Edzard Spillner, PhD
,
Institute of Biochemistry and Molecular Biology, Department of Chemistry, University of Hamburg, Hamburg, Germany
Johannes Ring
,
Department of Dermatology and Allergy Biederstein, Technische Universität München, Munich, Germany
Markus Ollert
,
Department of Dermatology and Allergy Biederstein, Technische Universitaet Muenchen, Munich, Germany
Background: Up to 3% of the general population suffer from potentially life-threatening systemic reactions after honeybee and wasp stings. Unfortunately, there are still individuals who have a convincing history of an anaphylactic event, but lack the necessary diagnostic, making difficult the decision for immunotherapy. Our aims were to evaluate the feasibility of using recombinant allergens in the Basophil activation test (BAT) for the diagnosis of Hymenoptera allergy and to develop a high-throughput diagnostic device combining the advantages of basophil activation tests with a panel of recombinant allergens: rVes v 1, rVes v 2, rVes v 3, rVes v 5, rApi m 1, rApi m 2, rApi m 3 and rApi m 5.
Methods: Basophil activation test (BAT) and measurement of specific IgE was performed on 47 wasp venom, 14 Honeybee venom allergic patients and 17 healthy controls. Specificity and sensitivity of BAT performed with recombinant His-tag purified wasp venom allergens Ves v 1, Ves v 2, Ves v 3 and Ves v 5, recombinant honeybee venom allergens Api m 1, Api m 2, Api m 3 and Api m 5 and commercial extracts have been compared. Each patient had a history of grade I or II anaphylaxis after an insect sting. All patient sera were collected before initiation of SIT.
Results: BAT performed with the panel of recombinant allergens markedly increased the specificity and the sensitivity in the detection of wasp venom allergic subjects.
Conclusions: Basophil activation test provides a valuable new in vitro method for the detection of allergy to wasp venom and may supplement routine tests for allergy diagnosis in problematic cases. Recombinant allergens might help to dissect relevant allergens for basophil degranulation.
