Anna Pomés1, Jill Glesner2, Agustin Calatroni3, Cindy M Visness3, Robert A Wood4, George T O'Connor5, Meyer Kattan6, Leonard B Bacharier7, Lisa M Wheatley8, James E Gern9, William W Busse9. 1. Indoor Biotechnologies, Inc, Basic Research, Charlottesville, Va. Electronic address: apomes@inbio.com. 2. Indoor Biotechnologies, Inc, Basic Research, Charlottesville, Va. 3. Rho Federal Systems Division, Chapel Hill, NC. 4. Departments of Pediatrics and Allergy and Immunology, Johns Hopkins University, Baltimore, Md. 5. Department of Medicne, Boston University School of Medicine, Boston, Mass. 6. Department of Pediatrics, Columbia University, New York, NY. 7. Department of Pediatrics, Washington University School of Medicine, St Louis, Mo. 8. Division of Allergy, Immunology, and Transplantation, National Institute of Allergy and Infectious Diseases, Bethesda, Md. 9. Departments of Pediatrics and Medicine, University of Wisconsin-Madison, Madison, Wis.
Abstract
BACKGROUND: Cockroach is one of the most important sources of indoor allergens and can lead to IgE sensitization and development of rhinitis and asthma. OBJECTIVE: We sought to perform a cockroach allergen component analysis to determine the allergens and antibody levels and patterns of sensitization associated with asthma and rhinitis. METHODS: Antibody (IgE, IgG, and IgG4) levels to total cockroach and 8 cockroach allergens were determined in 2 groups of cockroach-sensitized 10-year-old children with (n = 19) or without (n = 28) asthma and rhinitis. Allergen-specific antibody levels were measured in streptavidin ImmunoCAPs loaded with each of the recombinant allergens from groups 1, 2, 4, 5, 6, 7, 9, and 11, and total cockroach-specific IgE levels were measured with the i6 ImmunoCAP. RESULTS: IgE antibody levels to cockroach allergens and extract, but not IgG or IgG4 antibody levels, differed between subjects with and without asthma and rhinitis. Specifically, recognition of more cockroach allergens with higher allergen-specific IgE levels was associated with disease. Variable patterns of sensitization with no immunodominant allergens were found in both groups. There was a good correlation between the sum of allergen-specific IgE and total cockroach IgE levels (r = 0.86, P < .001). CONCLUSIONS: Component analysis of 8 cockroach allergens revealed significant differences in IgE reactivity associated with the presence of asthma and rhinitis. Allergen-specific IgE titers and sensitization profiles were associated with asthma and rhinitis.
BACKGROUND: Cockroach is one of the most important sources of indoor allergens and can lead to IgE sensitization and development of rhinitis and asthma. OBJECTIVE: We sought to perform a cockroach allergen component analysis to determine the allergens and antibody levels and patterns of sensitization associated with asthma and rhinitis. METHODS: Antibody (IgE, IgG, and IgG4) levels to total cockroach and 8 cockroach allergens were determined in 2 groups of cockroach-sensitized 10-year-old children with (n = 19) or without (n = 28) asthma and rhinitis. Allergen-specific antibody levels were measured in streptavidin ImmunoCAPs loaded with each of the recombinant allergens from groups 1, 2, 4, 5, 6, 7, 9, and 11, and total cockroach-specific IgE levels were measured with the i6 ImmunoCAP. RESULTS:IgE antibody levels to cockroach allergens and extract, but not IgG or IgG4 antibody levels, differed between subjects with and without asthma and rhinitis. Specifically, recognition of more cockroach allergens with higher allergen-specific IgE levels was associated with disease. Variable patterns of sensitization with no immunodominant allergens were found in both groups. There was a good correlation between the sum of allergen-specific IgE and total cockroach IgE levels (r = 0.86, P < .001). CONCLUSIONS: Component analysis of 8 cockroach allergens revealed significant differences in IgE reactivity associated with the presence of asthma and rhinitis. Allergen-specific IgE titers and sensitization profiles were associated with asthma and rhinitis.
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