{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,9,9]],"date-time":"2026-09-09T18:35:53Z","timestamp":1788978953908,"version":"build-2803163510"},"reference-count":54,"publisher":"Wiley","issue":"2","license":[{"start":{"date-parts":[[2023,11,2]],"date-time":"2023-11-02T00:00:00Z","timestamp":1698883200000},"content-version":"vor","delay-in-days":0,"URL":"http:\/\/onlinelibrary.wiley.com\/termsAndConditions#vor"}],"funder":[{"DOI":"10.13039\/100000002","name":"National Institutes of Health","doi-asserted-by":"publisher","award":["R21AI149277"],"award-info":[{"award-number":["R21AI149277"]}],"id":[{"id":"10.13039\/100000002","id-type":"DOI","asserted-by":"publisher"}]},{"DOI":"10.13039\/100000002","name":"National Institutes of Health","doi-asserted-by":"publisher","award":["U19AI104209"],"award-info":[{"award-number":["U19AI104209"]}],"id":[{"id":"10.13039\/100000002","id-type":"DOI","asserted-by":"publisher"}]},{"DOI":"10.13039\/100000002","name":"National Institutes of Health","doi-asserted-by":"publisher","award":["R21EB030643"],"award-info":[{"award-number":["R21EB030643"]}],"id":[{"id":"10.13039\/100000002","id-type":"DOI","asserted-by":"publisher"}]},{"DOI":"10.13039\/100011098","name":"Stanford Bio-X","doi-asserted-by":"publisher","award":["R10\u201024"],"award-info":[{"award-number":["R10\u201024"]}],"id":[{"id":"10.13039\/100011098","id-type":"DOI","asserted-by":"publisher"}]}],"content-domain":{"domain":["onlinelibrary.wiley.com"],"crossmark-restriction":true},"short-container-title":["Allergy"],"published-print":{"date-parts":[[2024,2]]},"abstract":"<jats:title>Abstract<\/jats:title><jats:sec><jats:title>Background<\/jats:title><jats:p>Conventional basophil activation tests (BATs) measure basophil activation by the increased expression of CD63. Previously, fluorophore\u2010labeled avidin, a positively\u2010charged molecule, was found to bind to activated basophils, which tend to expose negatively charged granule constituents during degranulation. This study further compares avidin versus CD63 as basophil activation biomarkers in classifying peanut allergy.<\/jats:p><\/jats:sec><jats:sec><jats:title>Methods<\/jats:title><jats:p>Seventy subjects with either a peanut allergy (<jats:italic>N<\/jats:italic>\u2009=\u200947), a food allergy other than peanut (<jats:italic>N<\/jats:italic>\u2009=\u20096), or no food allergy (<jats:italic>N<\/jats:italic>\u2009=\u200917) were evaluated. We conducted BATs in response to seven peanut extract (PE) concentrations (0.01\u201310,000\u2009ng\/mL) and four control conditions (no stimulant, anti\u2010IgE, fMLP (N\u2010formylmethionine\u2010leucyl\u2010phenylalanine), and anti\u2010Fc\u03b5RI). We measured avidin binding and CD63 expression on basophils with flow cytometry. We evaluated logistic regression and XGBoost models for peanut allergy classification and feature identification.<\/jats:p><\/jats:sec><jats:sec><jats:title>Results<\/jats:title><jats:p>Avidin binding was correlated with CD63 expression. Both markers discriminated between subjects with and without a peanut allergy. Although small by percentage, an avidin<jats:sup>+<\/jats:sup>\/CD63<jats:sup>\u2212<\/jats:sup> cell subset was found in all allergic subjects tested, indicating that the combination of avidin and CD63 could allow a more comprehensive identification of activated basophils. Indeed, we obtained the best classification accuracy (97.8% sensitivity, 96.7% specificity) by combining avidin and CD63 across seven PE doses. Similar accuracy was obtained by combining PE dose of 10,000\u2009ng\/mL for avidin and PE doses of 10 and 100\u2009ng\/mL for CD63.<\/jats:p><\/jats:sec><jats:sec><jats:title>Conclusions<\/jats:title><jats:p>Avidin and CD63 are reliable BAT activation markers associated with degranulation. Their combination enhances the identification of activated basophils and improves the classification accuracy of peanut allergy.<\/jats:p><\/jats:sec>","DOI":"10.1111\/all.15930","type":"journal-article","created":{"date-parts":[[2023,11,2]],"date-time":"2023-11-02T11:45:01Z","timestamp":1698925501000},"page":"445-455","update-policy":"https:\/\/doi.org\/10.1002\/crossmark_policy","source":"Crossref","is-referenced-by-count":11,"title":["Combining avidin with CD63 improves basophil activation test accuracy in classifying peanut allergy"],"prefix":"10.1111","volume":"79","author":[{"ORCID":"https:\/\/orcid.org\/0000-0002-9244-3313","authenticated-orcid":false,"given":"Nicolas","family":"Casta\u00f1o","sequence":"first","affiliation":[{"name":"Department of Mechanical Engineering Stanford University  Stanford California USA"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0009-0009-1730-6149","authenticated-orcid":false,"given":"Kaiser","family":"Chua","sequence":"additional","affiliation":[{"name":"Department of Mechanical Engineering Stanford University  Stanford California USA"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Abhinav","family":"Kaushik","sequence":"additional","affiliation":[{"name":"Sean N. 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