Autor(es):
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
Data: 2016
Identificador Persistente: http://hdl.handle.net/10174/16562
Origem: Repositório Científico da Universidade de Évora
Descrição
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.
This publication arises from HIALINE, a project that has received funding from the European Union in the framework of the Health Programme
