☆ 4.7 Article

Defining biomarkers to predict symptoms in subjects with and without allergy under natural pollen exposure

JOURNAL OF ALLERGY AND CLINICAL IMMUNOLOGY (2020)

期刊

JOURNAL OF ALLERGY AND CLINICAL IMMUNOLOGY

卷 146, 期 3, 页码 583-+

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MOSBY-ELSEVIER

DOI: 10.1016/j.jaci.2020.02.037

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Allergic rhinitis; biomarkers; chemokines; cytokines; immunoglobulins; nasal symptoms; pollen

类别

Allergy Immunology

资金

Christine Kuhne - Center for Allergy Research and Education (CK-CARE)
Initiative and Networking Fund of the Helmholtz Association (Immunology Inflammation)

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摘要

Background: Pollen exposure induces local and systemic allergic immune responses in sensitized individuals, but nonsensitized individuals also are exposed to pollen. The kinetics of symptom expression under natural pollen exposure have never been systematically studied, especially in subjects without allergy. Objective: We monitored the humoral immune response under natural pollen exposure to potentially uncover nasal biomarkers for in-season symptom severity and identify protective factors. Methods: We compared humoral immune response kinetics in a panel study of subjects with seasonal allergic rhinitis (SAR) and subjects without allergy and tested for cross-sectional and interseasonal differences in levels of serum and nasal, total, and Betula verrucosa 1-specific immunoglobulin isotypes; immunoglobulin free light chains; cytokines; and chemokines. Nonsupervised principal component analysis was performed for all nasal immune variables, and single immune variables were correlated with in-season symptom severity by Spearman test. Results: Symptoms followed airborne pollen concentrations in subjects with SAR, with a time lag between 0 and 13 days depending on the pollen type. Of the 7 subjects with nonallergy, 4 also exhibited in-season symptoms whereas 3 did not. Cumulative symptoms in those without allergy were lower than in those with SAR but followed the pollen exposure with similar kinetics. Nasal eotaxin-2, CCL22/MDC, and monocyte chemoattactant protein-1 (MCP-1) levels were higher in subjects with SAR, whereas IL-8 levels were higher in subjects without allergy. Principal component analysis and Spearman correlations identified nasal levels of IL-8, IL-33, and Betula verrucosa 1-specific IgG 4 (sIgG 4) and Betula verrucosa 1-specific IgE (sIgE) antibodies as predictive for seasonal symptom severity. Conclusions: Nasal pollen-specific IgA and IgG isotypes are potentially protective within the humoral compartment. Nasal levels of IL-8, IL-33, sIgG 4 and sIgE could be predictive biomarkers for pollen-specific symptom expression, irrespective of atopy.

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Microbial characterization of the nasal cavity in patients with allergic rhinitis and non-allergic rhinitis

Yanlu Che, Nan Wang, Qianzi Ma, Junjie Liu, Zhaonan Xu, Qiuying Li, Jingting Wang, Yanan Sun

Summary: This study investigated the differences in nasal flora composition between patients with allergic rhinitis (AR) and non-allergic rhinitis (nAR) and their role in pathogenesis. The results showed that AR patients had a significantly higher abundance of Vibrio vulnificus and Acinetobacter baumanni in the nasal cavity compared to nAR patients, while the abundance of Lactobacillus murinus, Lactobacillus iners, Proteobacteria, Pseudomonadales, and Escherichia coli was lower. The study also identified specific bacterial models associated with AR and nAR, providing new insights for their treatment.

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