Waldherr, S.* ; Hils, M.* ; Köberle, M.* ; Brockow, K.* ; Darsow, U.* ; Blank, S. ; Biedermann, T.* ; Eberlein, B.*
Basophil activation in insect venom allergy: Comparison of an established test using liquid reagents with a test using 5-color tubes with dried antibody reagents.
BMC Immunol. 25:23 (2024)
BACKGROUND: Flow cytometry-based basophil activation tests (BAT) have been performed with various modifications, differing in the use of distinct identification and activation markers. Established tests use liquid reagents while a new development involves the use of tubes with dried antibody reagents. The aim of this pilot study was to compare these two techniques in patients with insect venom allergy. METHODS: Seventeen patients with an insect venom allergy were included in the study. The established "BAT 1" utilizes conventional antibody solutions of anti-CCR3 for basophil identification and anti-CD63 to assess basophil activation, whereas "BAT 2" uses dried anti-CD45, anti-CD3, anti-CRTH2, anti-203c and anti-CD63 for identification and activation measurement of basophils. Negative and positive controls as well as incubations with honey bee venom and yellow jacket venom at three concentrations were performed. RESULTS: Seven patients had to be excluded due to low basophil counts, high values in negative controls or negative positive controls. For the remaining 10 patients the overall mean (± SD) difference in activated basophils between the two tests was 0.2 (± 12.2) %P. In a Bland-Altman plot, the limit of agreement (LoA) ranged from 24.0 to -23.7. In the qualitative evaluation (value below/above cut-off) Cohen's kappa was 0.77 indicating substantial agreement. BAT 2 took longer to perform than BAT 1 and was more expensive. CONCLUSION: The BAT 2 technique represents an interesting innovation, however, it was found to be less suitable compared to an established BAT for the routine diagnosis of insect venom allergies.
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Publication type
Article: Journal article
Document type
Scientific Article
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Keywords
Basophil Activation Test ; Dried Antibody Reagents ; Insect Venom Allergy ; Liquid Reagents; Cd63; Expression; Agreement; Marker; Ccr3
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Language
english
Publication Year
2024
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0
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2024
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1471-2172
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Volume: 25,
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Article Number: 23
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Bmc
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Campus, 4 Crinan St, London N1 9xw, England
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Peer reviewed
POF-Topic(s)
30202 - Environmental Health
Research field(s)
Allergy
PSP Element(s)
G-505400-001
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Projekt DEAL
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Erfassungsdatum
2024-06-07