title: Recommendations for the use of in vitro methods to detect specific immunoglobulin E: are they comparable?
abstract: Total and specific immunoglobulin (Ig) E can be detected in vitro using several commercially available methods. The largest share of the global market for these methods is held by the ImmunoCAP technique (Thermo Fisher, previously Phadia), Immulite (Siemens), and Hytec-288 (Hycor). Most comparative studies examine Immulite and ImmunoCAP, which differ methodologically but use similar units of measurement relative to the same standard of total IgE (WHO IgE Standard 75/502). Despite their similarity, these kits differ in their quantification of specific IgE, which varies depending on the allergen studied.Thus, specific IgE results obtained with ImmunoCAP and Immulite are not interchangeable. It is important to bear this in mind, especially when determining cutoff points as predictors of a response to oral challenge with specific food allergens. The method used in practice must be the same as the one in the publication guiding clinical decision making. We analyze differences between ImmunoCAP and ISAC microarray, 2 methods from the same manufacturer used to detect IgE to specific proteins (purified or recombinant).The results show that the IgE values obtained with ImmunoCAP are not equivalent to the corresponding values obtained with the ISAC microarray system.
authors.forename: M J
authors.initials: MJ
authors.lastname: Goikoetxea
authors.forename: M L
authors.initials: ML
authors.lastname: Sanz
authors.forename: B E
authors.initials: BE
authors.lastname: García
authors.forename: C
authors.initials: C
authors.lastname: Mayorga
authors.forename: N
authors.initials: N
authors.lastname: Longo
authors.forename: P M
authors.initials: PM
authors.lastname: Gamboa
authors.forename: D
authors.initials: D
authors.lastname: Barber
authors.forename: T
authors.initials: T
authors.lastname: Caballero Molina
authors.forename: A
authors.initials: A
authors.lastname: de la Calle Toral
authors.forename: L
authors.initials: L
authors.lastname: Escribano Mora
authors.forename: J M
authors.initials: JM
authors.lastname: García Martinez
authors.forename: M
authors.initials: M
authors.lastname: Labrador
authors.forename: M
authors.initials: M
authors.lastname: López Hoyos
authors.forename: J
authors.initials: J
authors.lastname: Martínez Quesada
authors.forename: J
authors.initials: J
authors.lastname: Monteseirin Mateo
mesh_terms: D000818:Animals; D006801:Humans; D007073:Immunoglobulin E / Q000032:analysis*; D040081:Protein Array Analysis; D011933:Reagent Kits, Diagnostic
chemical_list: D011933:Reagent Kits, Diagnostic; D007073:Immunoglobulin E