Airway iron and iron-regulatory cytokines in cystic fibrosis

The European Respiratory Journal
David W ReidE Haydn Walters

Abstract

Iron availability is critical to Pseudomonas aeruginosa. The current authors determined sputum iron, ferritin, microalbumin levels and total cell counts (TCC) in 19 adult patients with cystic fibrosis (CF) during an acute exacerbation and repeated analyses following a median of 12 days antibiotic treatment. The current authors also determined sputum interleukin (IL)-1beta and tumour necrosis factor (TNF)-alpha levels because of their putative role in intracellular iron homeostasis. Additional data were obtained from 17 stable CF patients, eight patients with stable chronic obstructive pulmonary disease (COPD) and six normal subjects. Overall, sputum iron, ferritin, microalbumin, IL-1beta and TNF-alpha concentrations and TCCs were significantly elevated in the CF patients compared to those with COPD and normal controls. Sputum ferritin levels were significantly elevated in acute versus stable CF patients and there was a trend for sputum TCC to be higher, but all other inflammatory indices were similar. In the CF patients, sputum iron was positively and strongly related to IL-1beta, TNF-alpha, ferritin and microalbumin levels, but negatively related to forced expiratory volume in one second % predicted. In those acute patients wh...Continue Reading

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