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- W2071946875 abstract "Rationale Nasal allergen provocations may be useful in investigating the pathophysiology of allergic rhinitis and effects of treatments. Objective To use grass pollen nasal allergen challenge (NAC) to investigate the effects of allergen immunotherapy in a cross-sectional study. Methods We studied nasal and cutaneous responses in untreated subjects with seasonal grass-pollen allergic rhinitis (n = 14) compared with immunotherapy-treated allergics (n = 14), plus a nonatopic control group (n = 14). Volunteers underwent a standardized NAC with 2000 biological units of timothy grass allergen (equivalent to 1.3 μg major allergen, Phl p5). Nasal fluid was collected and analysed by ImmunoCAP and multiplex assays. Clinical response was assessed by symptom scores and peak nasal inspiratory flow (PNIF). Cutaneous response was measured by intradermal allergen injection. Retrospective seasonal symptom questionnaires were also completed. Results Immunotherapy-treated patients had lower symptom scores (P = 0.04) and higher PNIF (P = 0.02) after challenge than untreated allergics. They had reduced early (P = 0.0007) and late (P < 0.0001) skin responses, and lower retrospective seasonal symptom scores (P < 0.0001). Compared to untreated allergics, immunotherapy-treated patients had reduced nasal fluid concentrations of IL-4, IL-9 and eotaxin (all P < 0.05, 8 h level and/or area under the curve comparison), and trends for reduced IL-13 (P = 0.07, area under the curve) and early-phase tryptase levels (P = 0.06). Conclusions Nasal allergen challenge is sensitive in the detection of clinical and biological effects of allergen immunotherapy and may be a useful surrogate marker of treatment efficacy in future studies." @default.
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- W2071946875 date "2015-04-06" @default.
- W2071946875 modified "2023-10-15" @default.
- W2071946875 title "Effect of grass pollen immunotherapy on clinical and local immune response to nasal allergen challenge" @default.
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- W2071946875 doi "https://doi.org/10.1111/all.12608" @default.
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