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Iron-binding proteins in sputum of chronic bronchitis patients with Haemophilus influenzae infections

L Vogel, D Schoonbrood, F Geluk, F Hoek, P Bresser, T Out, H Jansen, J Dankert, L van Alphen
European Respiratory Journal 1997 10: 2327-2333; DOI: 10.1183/09031936.97.10102327
L Vogel
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D Schoonbrood
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F Geluk
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F Hoek
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P Bresser
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T Out
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H Jansen
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J Dankert
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L van Alphen
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Abstract

Airway inflammation during infection is associated with increased transudation of serum proteins and increased production of protein by the airway epithelium. We therefore, assessed whether Haemophilus influenzae infections in patients with chronic bronchitis are associated with increased levels of transferrin and lactoferrin in the sputum compared to uninfected patients. Sputum sol phase and serum samples from 14 infected and 13 uninfected patients with chronic bronchitis and from 12 bronchial asthma patients were included in the study. The median Q-values (the concentration in sputum sol phase/the concentration in serum) x 10(3) of transferrin appeared increased in chronic bronchitis patients with an H. influenzae infection (26.0, n=13) compared to uninfected controls (9.5, n=11) and bronchial asthma patients (4.5, n=6). The ratio of the Q(transferrin)/Q(albumin) was >1 in infected chronic bronchitis patients, indicating local production of transferrin. Growth of H. influenzae was stimulated more in sputum from infected and uninfected patients with chronic bronchitis than in sputum from patients with bronchial asthma. The concentrations of lactoferrin were not significantly different in infected (n=14) and uninfected (n=13) chronic bronchitis patients and bronchial asthma patients (n=12) (median 137.4, 84.6, 87.1 mg x L(-1), respectively). We conclude that in patients with chronic bronchitis with Haemophilus influenzae infections, the levels of transferrin are increased and the levels of lactoferrin are not associated with infections.

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Iron-binding proteins in sputum of chronic bronchitis patients with Haemophilus influenzae infections
L Vogel, D Schoonbrood, F Geluk, F Hoek, P Bresser, T Out, H Jansen, J Dankert, L van Alphen
European Respiratory Journal Oct 1997, 10 (10) 2327-2333; DOI: 10.1183/09031936.97.10102327

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Iron-binding proteins in sputum of chronic bronchitis patients with Haemophilus influenzae infections
L Vogel, D Schoonbrood, F Geluk, F Hoek, P Bresser, T Out, H Jansen, J Dankert, L van Alphen
European Respiratory Journal Oct 1997, 10 (10) 2327-2333; DOI: 10.1183/09031936.97.10102327
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