PMID: 9534676Apr 16, 1998Paper

Nitric oxide metabolites in cystic fibrosis lung disease

Archives of Disease in Childhood
Hartmut GrasemannFelix Ratjen

Abstract

Although the activity of nitric oxide (NO) synthases are increased in lung tissue of patients with cystic fibrosis, the concentrations of nasal and exhaled NO have recently been found to be decreased in cystic fibrosis. This could either be due to reduced NO formation or metabolism of NO within airway fluids. In this study, the stable NO metabolites, nitrate and nitrite, were determined in the saliva and sputum of 18 stable cystic fibrosis patients, 21 cystic fibrosis patients during a pulmonary exacerbation, and in saliva and endotracheal secretions of normal controls. Median saliva concentrations of NO metabolites (nitrate plus nitrite) were 704 mumol/l (95% confidence interval (CI) 419 to 1477) in stable cystic fibrosis patients, 629 mumol/l (95% CI 382 to 1392) in cystic fibrosis patients presenting with pulmonary exacerbation, and 313 mumol/l (95% CI 312 to 454) in controls. Median sputum NO metabolite concentration in stable cystic fibrosis was 346 mumol/l (95% CI 311 to 504). This was not significantly different from cystic fibrosis patients presenting with pulmonary exacerbation (median 184 mumol/l, 95% CI 249 to 572), but significantly higher than in endotracheal secretions of controls (median 144 mumol/l, 95% CI 96 to...Continue Reading

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