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Mast cell tryptase changes with Aspergillus fumigatus - Host crosstalk in cystic fibrosis patients.
Journal of Cystic Fibrosis : Official Journal of the European Cystic Fibrosis Society 2018 September
Pulmonary and systemic antifungal immunity influences quality of life and survival of people with cystic fibrosis. Aspergillus fumigatus (Af) induces specific IgG and IgE. Mast cells respond to IgE, IgG and direct interactions with Af. Mast cells are the source of the protease tryptase. We aimed at evaluating serum baseline tryptase as a potential biomarker of the Af-host interaction in cystic fibrosis patients. Serum baseline tryptase, IgE and IgG directed to Af extract and Af molecular allergens were measured in 76 cystic fibrosis patients. The main findings were (i) lower levels of serum baseline tryptase in patients displaying specific IgE to Af (p < 0.0001) and (ii) an association between tryptase levels and IgE or IgG responses to Af and ribotoxin (Asp f 1). These findings suggest that serum baseline tryptase is influenced by Af-host interactions and thus might be a marker for mast cell regulation and pulmonary immune defenses.
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