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Galactose-alpha-1,3-Galactose-Specific IgE Is Associated with Anaphylaxis but Not Asthma
Umeå University, Faculty of Medicine, Department of Public Health and Clinical Medicine, Occupational and Environmental Medicine.
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2012 (English)In: American Journal of Respiratory and Critical Care Medicine, ISSN 1073-449X, E-ISSN 1535-4970, Vol. 185, no 7, 723-730 p.Article in journal (Refereed) Published
Abstract [en]

Rationale: IgE antibodies to the mammalian oligosaccharide galactose-alpha-1,3-galactose (alpha-gal) are common in the southeastern United States. These antibodies, which are induced by ectoparasitic ticks, can give rise to positive skin tests or serum assays with cat extract. Objectives: To evaluate the relationship between IgE antibodies to alpha-gal and asthma, and compare this with the relationship between asthma and IgE antibodies to Fel d 1 and other protein allergens. Methods: Patients being investigated for recurrent anaphylaxis, angioedema, or acute urticaria underwent spirometry, exhaled nitric oxide, questionnaires, and serum IgE antibody assays. The results were compared with control subjects and cohorts from the emergency department in Virginia (n = 130), northern Sweden (n = 963), and rural Kenya (n = 131). Measurements and Main Results: Patients in Virginia with high-titer IgE antibodies to a-gal had normal lung function, low levels of exhaled nitric oxide, and low prevalence of asthma symptoms. Among patients in the emergency department and children in Kenya, there was no association between IgE antibodies to a-gal and asthma (odds ratios, 1.04 and 0.75, respectively). In Sweden, IgE antibodies to cat were closely correlated with IgE antibodies to Fel d 1 (r = 0.83) and to asthma (P < 0.001). Conclusions: These results provide a model of an ectoparasite-induced specific IgE response that can increase total serum IgE without creating a risk for asthma, and further evidence that the main allergens that are causally related to asthma are those that are inhaled.

Place, publisher, year, edition, pages
2012. Vol. 185, no 7, 723-730 p.
Keyword [en]
alpha-gal, red meat allergy, ticks, total serum IgE, ectoparasite
National Category
Respiratory Medicine and Allergy Public Health, Global Health, Social Medicine and Epidemiology Environmental Health and Occupational Health
URN: urn:nbn:se:umu:diva-54319DOI: 10.1164/rccm.201111-2017OCISI: 000302043700010OAI: diva2:519843
Available from: 2012-04-24 Created: 2012-04-24 Last updated: 2012-10-10Bibliographically approved

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Rönmark, Eva
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