Evaluation of neutrophils phagocytosis and killing in pulmonary cystic fibrosis patients

Mortaz, Esmaeil; Asef, Alireza; Azempour, Elham; Ghaffaripour, Hossein Ali; Adcock, Ian M.; Koenderman, Leo

doi:10.1183/13993003.congress-2019.pa972

Cited by 1 publication

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“…Morris et al (2005) demonstrated that neutrophils from patients with CF had a lower phagocytic capacity than that of circulating neutrophils from the same patients or from normal control subjects [ 67 ]. Mortaz et al (2019) showed that neutrophils from peripheral blood in children with CF did not show impaired phagocytosis of Staphylococcus aureus and P. aeruginosa [ 68 ], as we showed in our study. We did not find differences in NET-mediated killing of P. aeruginosa between CF and control neutrophils, in contrast to some other results obtained with a different methodology [ 69 ].…”

Section: Discussionsupporting

confidence: 88%

Dysfunctions of Neutrophils in the Peripheral Blood of Children with Cystic Fibrosis

Bakalović,

Bokonjić,

Mihajlović

et al. 2023

Biomedicines

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Dysfunction of neutrophils in patients with cystic fibrosis (CF) is best characterized in bronchoalveolar lavage (BAL), whereas peripheral blood neutrophils are less examined, and the results are contradictory, especially in younger populations. Therefore, this work aimed to study functional and phenotypic changes in circulating neutrophils in children with CF. The study included 19 CF children (5–17 years) and 14 corresponding age-matched healthy children. Isolated neutrophils were cultured either alone or with different stimuli. Several functions were studied: apoptosis, NET-osis, phagocytosis, and production of reactive oxygen species (ROS), neutrophil elastase (NE), and 11 cytokines. In addition, the expression of 20 molecules involved in different functions of neutrophils was evaluated by using flow cytometry. CF neutrophils showed reduced apoptosis and lower production of NE and IL-18 compared to the healthy controls, whereas IL-8 was augmented. All of these functions were further potentiated after neutrophil stimulation, which included higher ROS production and the up-regulation of CD11b and IL-10 expression. NET-osis was higher only when neutrophils from moderate–severe CF were treated with Pseudomonas aeruginosa, and the process correlated with forced expiratory volume in the first second (FEV1). Phagocytosis was not significantly changed. In conclusion, circulating neutrophils from children with CF showed fewer impaired changes in phenotype than in function. Functional abnormalities, which were already present at the baseline levels in neutrophils, depended on the type of stimuli that mimicked different activation states of these cells at the site of infection.

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Section: Discussionsupporting

confidence: 88%