title: Human serum substitution by artificial sera of scalable allergen reactivity based on polyclonal antibodies and chimeras of human FcγRI and IgE domains.
abstract: Human sera are the first choice as controls for diagnostic applications such as immunoassays, but are limited regarding availability, varying quality, and high costs. In this study, we aimed to circumvent these limitations by the use of a chimeric adaptor molecule comprising the extracellular domains of the human FcγRI (CD64) fused with human IgE Fc domains (CD64-IgE Fc). Allergen-specific antibodies were produced in rabbits using eight different allergens, extracts, and allergen mixtures including mites, pollen, drugs, and food. Preincubation of polyclonal IgG with CD64-IgE Fc established allergen-specific artificial sera that showed comparable results for more than 20 allergens and allergen extracts in three diagnostic systems for the determination of specific IgE. The agreement for these artificial sera is within ±1 radioallergosorbent test (RAST) class. Hence, rabbit IgG complexed with the IgG-specific CD64-IgE Fc adaptor molecule could provide a substitute for human reference sera with specificity for virtually any protein of interest.
authors: Dr. Fooke Laboratories, Neuss, Germany.
authors: N
authors: N
authors: Offermann
authors: Immunological Engineering, Department of Engineering, Aarhus University, Aarhus, Denmark.
authors: M
authors: M
authors: Plum
authors: Dr. Fooke Laboratories, Neuss, Germany.
authors: U
authors: U
authors: Hübner
authors: Institute of Biochemistry and Molecular Biology, University of Hamburg, Hamburg, Germany.
authors: K
authors: K
authors: Rathloff
authors: Department of Experimental Pharmacology and Toxicology, University Medical Center Hamburg-Eppendorf, Hamburg, Germany.
authors: I
authors: I
authors: Braren
authors: Dr. Fooke Laboratories, Neuss, Germany.
authors: M
authors: M
authors: Fooke
authors: Immunological Engineering, Department of Engineering, Aarhus University, Aarhus, Denmark.
authors: E
authors: E
authors: Spillner
mesh_terms: D000485:Allergens / Q000276:immunology*; D000906:Antibodies / Q000235:genetics / Q000276:immunology*; D000918:Antibody Specificity / Q000276:immunology; D001802:Blood Substitutes / Q000009:adverse effects*; D002460:Cell Line; D004797:Enzyme-Linked Immunosorbent Assay; D015870:Gene Expression; D006801:Humans; D007114:Immunization; D007073:Immunoglobulin E / Q000737:chemistry / Q000235:genetics / Q000276:immunology*; D007074:Immunoglobulin G / Q000235:genetics / Q000276:immunology; D011485:Protein Binding / Q000276:immunology; D000072417:Protein Domains / Q000235:genetics / Q000276:immunology; D017452:Receptors, IgG / Q000737:chemistry / Q000235:genetics / Q000276:immunology*; D011993:Recombinant Fusion Proteins / Q000235:genetics / Q000276:immunology* / Q000302:isolation & purification / Q000378:metabolism
chemical_list: D000485:Allergens; D000906:Antibodies; D001802:Blood Substitutes; D007074:Immunoglobulin G; D017452:Receptors, IgG; D011993:Recombinant Fusion Proteins; D007073:Immunoglobulin E
keywords: FcγRI (CD64); allergen-specific antibodies; artificial sera; immunoglobulin E; standardization material