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Title: Variation of the group 5 grass pollen allergen content of airborne pollen in relation to geographic location and time in season
Authors: Buters, Jeroen
Prank, Marje
Sofiev, Mikhail
Pusch, Gudrun
Albertini, Roberto
Annesi-Maesano, Isabella
Antunes, Celia
Behrendt, Heidrun
Berger, Uwe
Brandao, Rui
Celenk, Sevcan
Galan, Carmen
Grewling, Lukasz
Jackowiack, Bogdan
Kennedy, Roy
Rantio-Lehtimäki, Auli
Reese, Gerald
Sauliene, Ingrida
Smith, Matt
Thibaudon, Michel
Weber, Bernhard
Cecchi, Lorenzo
Issue Date: 6-May-2015
Publisher: Journal of Allergy and Clinical Immunology
Citation: J. Buters, M. Prank, M. Sofiev, G. Pusch, R. Albertini, I. Annesi-Maesano, C. Antunes, H. Behrendt, U. Berger, R. Brandao, S. Celenk, C. Galan, L. Grewling, R. Kennedy, A.i Rantio-Lehtimäki, G. Reese, I. Sauliene, M. Smith, M. Thibaudon, B. Weber, L. Cecchi (2015). Airborne Phl p 5 in different fractions of ambient air deviates from grass pollen counts in 10 countries across Europe. J Allergy Clin Immunology 136(1): 87-95e6
Abstract: Background: Allergies to grass pollen are the number one cause of outdoor hay fever. The human immune system reacts with symptoms to allergen from pollen. Objective: We investigated the natural variability in release of the major group 5 allergen from grass pollen across Europe. Methods: Airborne pollen and allergens were simultaneously collected daily with a volumetric spore trap and a high-volume cascade impactor at 10 sites across Europe for 3 consecutive years. Group 5 allergen levels were determined with a Phl p 5–specific ELISA in 2 fractions of ambient air: particulate matter of greater than10mmin diameter andparticulatematter greater than 2.5mm and less than 10 mm in diameter. Mediator release by ambient air was determined in FcεRI-humanized basophils. The origin of pollen was modeled and condensed to pollen potency maps. Results: On average, grass pollen released 2.3 pg of Phl p 5 per pollen. Allergen release per pollen (potency) varied substantially, ranging from less than 1 to 9 pg of Phl p 5 per pollen (5% to 95% percentile). The main variation was locally day to day. Average potency maps across Europe varied between years. Mediator release from basophilic granulocytes correlated better with allergen levels per cubic meter (r2 5 0.80, P < .001) than with pollen grains per cubic meter (r2 5 0.61, P < .001). In addition, pollen released different amounts of allergen in the non–pollenbearing fraction of ambient air, depending on humidity. Conclusion: Across Europe, the same amount of pollen released substantially different amounts of group 5 grass pollen allergen. This variation in allergen release is in addition to variations in pollen counts. Molecular aerobiology (ie, determining allergen in ambient air) might be a valuable addition to pollen counting.
Type: article
Appears in Collections:MED - Publicações - Artigos em Revistas Internacionais Com Arbitragem Científica

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