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- W3164853665 abstract "Background Chronic infection and an exaggerated inflammatory response are key drivers of the pathogenesis of cystic fibrosis (CF), especially CF lung disease. An imbalance of pro- and anti-inflammatory mediators, including dysregulated Th2/Th17 cells and impairment of regulatory T cells (Tregs), maintain CF inflammation. CF transmembrane conductance regulator (CFTR) modulator therapy might influence these immune cell abnormalities. Methods Peripheral blood mononuclear cells and serum samples were collected from 108 patients with CF (PWCF) and 40 patients with non-CF bronchiectasis. Samples were analysed for peripheral blood lymphocytes subsets (Tregs; Th1-, Th1/17-, Th17- and Th2-effector cells) and systemic T helper cell-associated cytokines (interleukin [IL]-5, IL-13, IL-2, IL-6, IL-9, IL-10, IL-17A, IL-17F, IL-4, IL-22, interferon-γ, tumour necrosis factor-α) using flow cytometry. Results 51% of PWCF received CFTR modulators (ivacaftor, ivacaftor/ lumacaftor or tezacaftor/ ivacaftor). There were no differences in proportions of analysed T cell subsets or cytokines between PWCF who were versus were not receiving CFTR modulators. Additional analysis revealed lower percentages of Tregs in PWCF and chronic pulmonary Pseudomonas aeruginosa infection; this difference was also present in PWCF treated with CFTR modulators. Patients with non-CF bronchiectasis tended to have higher percentages of Th2- and Th17-cells and higher levels of peripheral cytokines versus PWCF. Conclusions Chronic P. aeruginosa lung infection appears to impair Tregs in PWCF (independent of CFTR modulator therapy) but not those with non-CF bronchiectasis. Moreover, our data showed no statistically significant differences in major subsets of peripheral lymphocytes and cytokines among PWCF who were versus were not receiving CFTR modulators." @default.
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- W3164853665 date "2021-11-01" @default.
- W3164853665 modified "2023-09-24" @default.
- W3164853665 title "Pseudomonas aeruginosa infection, but not mono or dual-combination CFTR modulator therapy affects circulating regulatory T cells in an adult population with cystic fibrosis" @default.
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- W3164853665 doi "https://doi.org/10.1016/j.jcf.2021.05.001" @default.
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