Abstract
Background: Aspirin-exacerbated respiratory disease (AERD) is characterized by the triad of chronic rhinosinusitis with nasal polyps (CRSwNP), asthma, and intolerance to cyclooxygenase-1 enzyme inhibitors. The underlying mechanisms contributing to AERD pathogenesis are not fully understood, but AERD is characterized by an enhanced type 2 inflammatory phenotype. Basophils are potent type 2 effector cells, but their involvement in AERD pathophysiology remains unclear. Objective: We sought to characterize the systemic and local basophil responses in patients with AERD compared with patients with CRSwNP. Methods: Sinonasal tissues including inferior turbinate and/or nasal polyps (NPs) and peripheral blood were collected from controls, patients with AERD, and patients with CRSwNP. Expression of cell surface (CD45, FcεRI, CD203c), activation (CD63), and intracellular (2D7) markers associated with basophils was characterized using flow cytometry. Clinical data including Lund-Mackay scores and pulmonary function were obtained. Results: The mean number of basophils (CD45+CD203c+FcεRI+CD117−) detected in AERD NPs (147 ± 28 cells/mg tissue) was significantly elevated compared with that detected in CRSwNP NPs (69 ± 20 cells/mg tissue; P = .01). The number of circulating basophils was significantly elevated in patients with AERD (P = .04). Basophils in NPs had significantly higher CD203c and CD63 mean fluorescence intensity compared with blood in both conditions (P < .01). Basophils from AERD NPs had lower expression of the granule content marker 2D7 compared with those from matched blood (P < .01) or NPs of patients with CRSwNP (P = .06), suggesting ongoing degranulation. Basophil 2D7 mean fluorescence intensity significantly correlated with pulmonary function (r = 0.62; P = .02) and inversely correlated with sinonasal inflammation (r = −0.56; P = .004). Conclusions: Increased basophil numbers and extent of ongoing degranulation in NPs of patients with AERD compared with patients with CRSwNP may contribute to the exaggerated disease pathogenesis and severity unique to AERD.
Original language | English (US) |
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Pages (from-to) | 439-449.e5 |
Journal | Journal of Allergy and Clinical Immunology |
Volume | 148 |
Issue number | 2 |
DOIs | |
State | Published - Aug 2021 |
Funding
This research was supported in part by the National Institutes of Health grants (grant no. KL2 TR001424, K23 AI141694, R01 AI137174, U19 AI106683 , and P01 AI145818 ), by grants from the Parker B. Francis Fellowship Foundation and the American Partnership for Eosinophilic Disorders (APFED)/AAAAI HOPE Pilot Grant Award, and by the Ernest S. Bazley Foundation. Disclosure of potential conflict of interest: W. W. Stevens served on an advisory board for GlaxoSmithKline. A. Kato reports personal fees from Astellas Pharmaceuticals and a gift for his research from Lyra Therapeutics. A. T. Peters reports personal fees from Sanofi Regeneron and personal fees and grants from AstraZeneca and Optinose. L. C. Grammer reports personal fees from Astellas Pharmaceuticals. B. K. Tan reports personal fees from Sanofi Regeneron/Genzyme and OptiNose. R. C. Kern reports personal fees from Genentech, GlaxoSmithKline, Sanofi, Novartis, Lyra Pharmaceutical, and Neurent. R. P. Schleimer reports personal fees from Intersect ENT, Merck, GlaxoSmithKline, Sanofi, AstraZeneca/Medimmune, Genentech, Actobio Therapeutics, Lyra Therapeutics, Astellas Pharma, Inc, and Otsuka, Inc, and also has Siglec-8 and Siglec-8 ligand-related patents licensed to Allakos, Inc. The rest of the authors declare that they have no relevant conflicts of interest. This research was supported in part by the National Institutes of Health grants (grant no. KL2 TR001424, K23 AI141694, R01 AI137174, U19 AI106683, and P01 AI145818), by grants from the Parker B. Francis Fellowship Foundation and the American Partnership for Eosinophilic Disorders (APFED)/AAAAI HOPE Pilot Grant Award, and by the Ernest S. Bazley Foundation. Disclosure of potential conflict of interest: W. W. Stevens served on an advisory board for GlaxoSmithKline. A. Kato reports personal fees from Astellas Pharmaceuticals and a gift for his research from Lyra Therapeutics. A. T. Peters reports personal fees from Sanofi Regeneron and personal fees and grants from AstraZeneca and Optinose. L. C. Grammer reports personal fees from Astellas Pharmaceuticals. B. K. Tan reports personal fees from Sanofi Regeneron/Genzyme and OptiNose. R. C. Kern reports personal fees from Genentech, GlaxoSmithKline, Sanofi, Novartis, Lyra Pharmaceutical, and Neurent. R. P. Schleimer reports personal fees from Intersect ENT, Merck, GlaxoSmithKline, Sanofi, AstraZeneca/Medimmune, Genentech, Actobio Therapeutics, Lyra Therapeutics, Astellas Pharma, Inc, and Otsuka, Inc, and also has Siglec-8 and Siglec-8 ligand-related patents licensed to Allakos, Inc. The rest of the authors declare that they have no relevant conflicts of interest.
Keywords
- 2D7
- AERD
- Aspirin-exacerbated respiratory disease
- CRSwNP
- basophil
- chronic sinusitis
- nasal polyp
ASJC Scopus subject areas
- Immunology and Allergy
- Immunology