Abstract
| Originalsprog | Engelsk |
|---|---|
| Tidsskrift | Thorax |
| Vol/bind | 65 |
| Udgave nummer | 1 |
| Sider (fra-til) | 57-62 |
| Antal sider | 6 |
| ISSN | 0040-6376 |
| DOI | |
| Status | Udgivet - 1 jan. 2010 |
Bibliografisk note
Keywords: Adult; Bronchi; Chronic Disease; Cystic Fibrosis; Female; Humans; Male; Middle Aged; NADPH Oxidase; Neutrophils; Oxygen Consumption; Phagocytosis; Pseudomonas Infections; Pseudomonas aeruginosa; Reactive Oxygen Species; Respiratory Burst; Sputum; Superoxides; Young AdultAdgang til dokumentet
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I: Thorax, Bind 65, Nr. 1, 01.01.2010, s. 57-62.
Publikation: Bidrag til tidsskrift › Tidsskriftartikel › Forskning › peer review
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TY - JOUR
T1 - Polymorphonuclear leucocytes consume oxygen in sputum from chronic Pseudomonas aeruginosa pneumonia in cystic fibrosis
AU - Kolpen, Mette
AU - Hansen, C. R.
AU - Bjarnsholt, Thomas
AU - Moser, C
AU - Hultqvist, Louise Dahl
AU - van Gennip, M
AU - Ciofu, O
AU - Mandsberg, L
AU - Kharazmi, A
AU - Döring, G
AU - Givskov, M
AU - Høiby, N
AU - Jensen, Peter Østrup
N1 - Keywords: Adult; Bronchi; Chronic Disease; Cystic Fibrosis; Female; Humans; Male; Middle Aged; NADPH Oxidase; Neutrophils; Oxygen Consumption; Phagocytosis; Pseudomonas Infections; Pseudomonas aeruginosa; Reactive Oxygen Species; Respiratory Burst; Sputum; Superoxides; Young Adult
PY - 2010/1/1
Y1 - 2010/1/1
N2 - BACKGROUND: Chronic lung infection with Pseudomonas aeruginosa is the most severe complication for patients with cystic fibrosis (CF). This infection is characterised by endobronchial mucoid biofilms surrounded by numerous polymorphonuclear leucocytes (PMNs). The mucoid phenotype offers protection against the PMNs, which are in general assumed to mount an active respiratory burst leading to lung tissue deterioration. An ongoing respiratory burst by the PMNs has, however, not been demonstrated previously in endobronchial secretions from chronically infected patients with CF. OBJECTIVE: Based on the accumulating evidence for depletion of molecular oxygen (O(2)) in the mucus in infected CF bronchi, it was hypothesised that the O(2) depletion in the mucus in infected CF bronchi may be accelerated by the respiratory burst of the PMNs due to the reduction of O(2) to the superoxide anion (O(-)(2)) by the phagocyte NADPH oxidase (Phox). METHODS: Methods were established to isolate the O(2) consumption by the respiratory burst from aerobic respiration in freshly expectorated sputum from chronically infected patients with CF. RESULTS: Inhibition of the Phox with diphenylene iodonium (DPI) delayed O(2) depletion, nearly abolished staining of O(-)(2)-producing PMNs with hydroethidine and inhibited the rapid luminol-enhanced chemiluminescence in sputum. Furthermore, the total O(2) consumption was correlated to the concentration of PMNs in the sputum samples. CONCLUSION: The results demonstrate that CF sputum contains PMNs with an active consumption of O(2) for O(-)(2) production and suggest that the respiratory burst is ongoing and causes accelerated O(2) depletion due to formation of O(-)(2) in the lungs of chronically infected patients with CF.
AB - BACKGROUND: Chronic lung infection with Pseudomonas aeruginosa is the most severe complication for patients with cystic fibrosis (CF). This infection is characterised by endobronchial mucoid biofilms surrounded by numerous polymorphonuclear leucocytes (PMNs). The mucoid phenotype offers protection against the PMNs, which are in general assumed to mount an active respiratory burst leading to lung tissue deterioration. An ongoing respiratory burst by the PMNs has, however, not been demonstrated previously in endobronchial secretions from chronically infected patients with CF. OBJECTIVE: Based on the accumulating evidence for depletion of molecular oxygen (O(2)) in the mucus in infected CF bronchi, it was hypothesised that the O(2) depletion in the mucus in infected CF bronchi may be accelerated by the respiratory burst of the PMNs due to the reduction of O(2) to the superoxide anion (O(-)(2)) by the phagocyte NADPH oxidase (Phox). METHODS: Methods were established to isolate the O(2) consumption by the respiratory burst from aerobic respiration in freshly expectorated sputum from chronically infected patients with CF. RESULTS: Inhibition of the Phox with diphenylene iodonium (DPI) delayed O(2) depletion, nearly abolished staining of O(-)(2)-producing PMNs with hydroethidine and inhibited the rapid luminol-enhanced chemiluminescence in sputum. Furthermore, the total O(2) consumption was correlated to the concentration of PMNs in the sputum samples. CONCLUSION: The results demonstrate that CF sputum contains PMNs with an active consumption of O(2) for O(-)(2) production and suggest that the respiratory burst is ongoing and causes accelerated O(2) depletion due to formation of O(-)(2) in the lungs of chronically infected patients with CF.
U2 - 10.1136/thx.2009.114512
DO - 10.1136/thx.2009.114512
M3 - Journal article
C2 - 19846469
SN - 0040-6376
VL - 65
SP - 57
EP - 62
JO - Thorax
JF - Thorax
IS - 1
ER -