University of Worcester Worcester Research and Publications

Contribution of Leptosphaeria Species Ascospores to Autumn Asthma in Areas of Oilseed Rape Production

Jędryczka, M., Sadyś, Magdalena, Gilski, M., Grinn-Gofroń, A., Kaczmarek, J., Strzelczak, A. and Kennedy, R. (2016) Contribution of Leptosphaeria Species Ascospores to Autumn Asthma in Areas of Oilseed Rape Production. Annals of Allergy, Asthma & Immunology, 117 (5). pp. 495-501. ISSN 1081-1206

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An increase in the number of hospital admissions from September to November in the northern hemisphere has been frequently reported. At this time, some species of fungal genus Leptosphaeria produce numerous ascospores, which are easily airborne. However, we lack knowledge about whether Leptosphaeria produces allergenic proteins.

To evaluate the potential of Leptosphaeria ascospores to contribute to autumn asthma.

Detailed bioinformatic analysis of proteins produced by Leptosphaeria maculans available in databases was performed and the data compared with allergens found in other airborne fungi. The concentrations of Leptosphaeria ascospores detected at 2 sites were compared to these obtained in other environments worldwide.

We found that Leptosphaeria species produce proteins with a high identity to commonly known aeroallergens of several well-characterized molds. The level of amino acid identity significantly exceeded the allergen identity thresholds recommended by the Food and Agricultural Organization/World Health Organization (35%), which indicates allergenic properties of L maculans and ensures the same properties in the other Leptosphaeria species.

High concentrations of Leptosphaeria species ascospores in the autumn and postulated allergenicity of their proteins strongly suggest that this genus contributes to worldwide reported autumn asthma. The finding opens the question of allergenicity of the other never studied fungal species present in aeroplankton.

Item Type: Article
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Uncontrolled Discrete Keywords: Leptosphaeria, autumn asthma, allergens, aeroallergens, ascospores
Subjects: Q Science > QR Microbiology > QR180 Immunology
Divisions: College of Health, Life and Environmental Sciences > School of Science and the Environment
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Depositing User: Magdalena Sadys
Date Deposited: 27 Aug 2019 10:13
Last Modified: 17 Jun 2020 17:32

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