Abstract
Chronic rhinosinusitis with nasal polyps is characterized by a T-helper cell type 2-skewed upper airway inflammation. Mucosal Staphylococcus aureus colonization is found in the majority of patients with nasal polyps. S. aureus is known to induce type 2 cytokine release via enterotoxins. To investigate the impact of non-enterotoxin-producing S. aureus on type 2 cytokine release. TSLP (thymic stromal lymphopoietin), IL-33, and type 2 cytokines were assessed in a human mucosal tissue model upon S. aureus infection. S. aureus exposure increased the expression of IL-33, TSLP, IL-5, and IL-13 in nasal polyp tissue, accompanied by elevated expression levels of TSLP and IL-33 receptors, predominantly on CD3+ T cells. S. aureus infection led to the release of TSLP, but not IL-33, IL-5, or IL-13, from healthy inferior turbinate tissue. In contrast, S. epidermidis did not induce any epithelial cell-derived cytokines in nasal polyp or healthy tissue. S. aureus infection also increased the release of IL-33 and TSLP in BEAS-2B epithelial cells, accompanied by activation of NF-κB (nuclear factor κB) pathways. Incubation with CU-CPT22, a specific Toll-like receptor 2 antagonist, significantly reduced the S. aureus-induced release of TSLP and I...Continue Reading
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