Valérie Siroux1, Christian Lupinek2, Yvonne Resch2, Mirela Curin2, Jocelyne Just3, Thomas Keil4, Renata Kiss2, Karin Lødrup Carlsen5, Erik Melén6, Rachel Nadif7, Isabelle Pin8, Ingebjørg Skrindo9, Susanne Vrtala10, Magnus Wickman11, Josep Maria Anto12, Rudolf Valenta2, Jean Bousquet13. 1. University of Grenoble Alpes, IAB, Team of Environmental Epidemiology applied to Reproduction and Respiratory Health, Grenoble, France; INSERM, IAB, Team of Environmental Epidemiology applied to Reproduction and Respiratory Health, Grenoble, France; CHU de Grenoble, IAB, Team of Environmental Epidemiology applied to Reproduction and Respiratory Health, Grenoble, France. Electronic address: Valerie.siroux@univ-grenoble-alpes.fr. 2. Division of Immunopathology, Department of Pathophysiology and Allergy Research, Center for Pathophysiology, Infectiology and Immunology, Medical University of Vienna, Vienna, Austria. 3. Assistance Publique-Hôpitaux de Paris, Hôpital Armand-Trousseau, Allergology Department, Paris, France; Université Paris 6 Pierre et Marie Curie, Paris, France. 4. Institute for Social Medicine, Epidemiology and Health Economics, Charité - Universitätsmedizin Berlin, Berlin, Germany; Institute for Clinical Epidemiology and Biometry, University of Würzburg, Würzburg, Germany. 5. Department of Paediatrics, Oslo University Hospital, Oslo, Norway; Faculty of Medicine, Institute of Clinical Medicine, University of Oslo, Oslo, Norway. 6. Institute of Environmental Medicine and the Centre for Allergy Research, Karolinska Institutet, Stockholm, Sweden; Sachs Children and Youth Hospital, Stockholm, Sweden. 7. INSERM U1168, VIMA (Aging and chronic diseases. Epidemiological and public health approaches), Villejuif, France; Univ Versailles St-Quentin-en-Yvelines, Montigny le Bretonneux, France. 8. University of Grenoble Alpes, IAB, Team of Environmental Epidemiology applied to Reproduction and Respiratory Health, Grenoble, France; INSERM, IAB, Team of Environmental Epidemiology applied to Reproduction and Respiratory Health, Grenoble, France; CHU de Grenoble, IAB, Team of Environmental Epidemiology applied to Reproduction and Respiratory Health, Grenoble, France. 9. Faculty of Medicine, Institute of Clinical Medicine, University of Oslo, Oslo, Norway; Department of Otorhinolaryngology, Akershus University Hospital, Lørenskog, Norway. 10. Division of Immunopathology, Department of Pathophysiology and Allergy Research, Center for Pathophysiology, Infectiology and Immunology, Medical University of Vienna, Vienna, Austria; Christian Doppler Laboratory for the Development of Allergen Chips, Department of Pathophysiology and Allergy Research, Center for Pathophysiology, Infectiology and Immunology, Medical University of Vienna, Vienna, Austria. 11. Sachs Children and Youth Hospital, Stockholm, Sweden; INSERM U1168, VIMA (Aging and chronic diseases. Epidemiological and public health approaches), Villejuif, France. 12. Centre for Research in Environmental Epidemiology (CREAL), Barcelona, Spain; IMIM (Hospital del Mar Medical Research Institute), Barcelona, Spain; Universitat Pompeu Fabra (UPF), Barcelona, Spain; CIBER Epidemiología y Salud Pública (CIBERESP), Barcelona, Spain. 13. INSERM U1168, VIMA (Aging and chronic diseases. Epidemiological and public health approaches), Villejuif, France; Univ Versailles St-Quentin-en-Yvelines, Montigny le Bretonneux, France; University Hospital, Montpellier, France.
Abstract
BACKGROUND: The nature of allergens and route and dose of exposure may affect the natural development of IgE and IgG responses. OBJECTIVE: We sought to investigate the natural IgE and IgG responses toward a large panel of respiratory and food allergens in subjects exposed to different respiratory allergen loads. METHODS: A cross-sectional analysis was conducted in 340 adults of the EGEA (Epidemiological study of the Genetics and Environment of Asthma, bronchial hyperresponsiveness and atopy) (170 with and 170 without asthma) cohort. IgE and IgG responses to 47 inhalant and food allergen components were analyzed in sera using allergen microarray and compared between 5 French regions according to the route of allergen exposure (inhaled vs food allergens). RESULTS: Overall 48.8% of the population had allergen-specific IgE levels of 0.3 ISAC standardized units (ISU) or more to at least 1 of the 47 allergens with no significant differences across the regions. For ubiquitous respiratory allergens (ie, grass, olive/ash pollen, house dust mites), specific IgE did not show marked differences between regions and specific IgG (≥0.5 ISU) was present in most subjects everywhere. For regionally occurring pollen allergens (ragweed, birch, cypress), IgE sensitization was significantly associated with regional pollen exposure. For airborne allergens cross-reacting with food allergens, frequent IgG recognition was observed even in regions with low allergen prevalence (Bet v 1) or for allergens less frequently recognized by IgE (profilins). CONCLUSIONS: The variability in allergen-specific IgE and IgG frequencies depends on exposure, route of exposure, and overall immunogenicity of the allergen. Allergen contact by the oral route might preferentially induce IgG responses.
BACKGROUND: The nature of allergens and route and dose of exposure may affect the natural development of IgE and IgG responses. OBJECTIVE: We sought to investigate the natural IgE and IgG responses toward a large panel of respiratory and food allergens in subjects exposed to different respiratory allergen loads. METHODS: A cross-sectional analysis was conducted in 340 adults of the EGEA (Epidemiological study of the Genetics and Environment of Asthma, bronchial hyperresponsiveness and atopy) (170 with and 170 without asthma) cohort. IgE and IgG responses to 47 inhalant and food allergen components were analyzed in sera using allergen microarray and compared between 5 French regions according to the route of allergen exposure (inhaled vs food allergens). RESULTS: Overall 48.8% of the population had allergen-specific IgE levels of 0.3 ISAC standardized units (ISU) or more to at least 1 of the 47 allergens with no significant differences across the regions. For ubiquitous respiratory allergens (ie, grass, olive/ash pollen, house dust mites), specific IgE did not show marked differences between regions and specific IgG (≥0.5 ISU) was present in most subjects everywhere. For regionally occurring pollen allergens (ragweed, birch, cypress), IgE sensitization was significantly associated with regional pollen exposure. For airborne allergens cross-reacting with food allergens, frequent IgG recognition was observed even in regions with low allergen prevalence (Bet v 1) or for allergens less frequently recognized by IgE (profilins). CONCLUSIONS: The variability in allergen-specific IgE and IgG frequencies depends on exposure, route of exposure, and overall immunogenicity of the allergen. Allergen contact by the oral route might preferentially induce IgG responses.
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