Abstract
The prevalence of allergic disease has increased world wide during the last decades. Pollen allergy is the most typical form of allergic disease. The increase in its frequency during recent years is the most evident. Environmental factors play an important role in the problem of pollen allergy in large cities. The aim of this research is determination of allergenicity of Canna pollen in polluted and non-polluted conditions, detection of their allergenic proteins and also elucidation of some microscopic effects of air pollutants on pollen structure and proteins. Mature and immature pollen grains of Canna indica were collected from polluted and non-polluted areas. Pollen grains were studied by scanning electron microscopy. Mice were sensitized by injection of pollen extract and an adjuvant for five times. Allergy potency of different pollen extracts were compared by means of skin test, blood eosinophills number and IgE levels in sensitized and treated animals. Pollen proteins were studied by SDS-PGE and allergenic proteins were detected by immunoblotting techniques. Scanning electron microscope study of the pollen grains showed that in polluted areas, air born particles accumulated on the surface of pollen and changed both pollen's shape and pollen's tectum. Also many vesicles were released out of polluted pollen and the pollen material agglomerated on the surface of pollen. SDS-PAGE showed that different proteins exist in mature and immature pollen. In pollen collected from polluted area, some of protein bands between 22 and 45 kDa were disappeared . Also in all polluted pollen grains, protein content of pollen decreased in response to air pollution causing the release of pollen proteins. According to our experiments and regarding induction of allergic symptoms, the polluted pollen is more effective than non-polluted one, and mature pollen has more allergy potency than immature one.
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Majd, A., Chehregani, A., Moin, M. et al. The Effects of Air Pollution on Structures, Proteins and Allergenicity of Pollen Grains. Aerobiologia 20, 111–118 (2004). https://doi.org/10.1023/B:AERO.0000032950.12169.38
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DOI: https://doi.org/10.1023/B:AERO.0000032950.12169.38