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MEKC of desmosine and isodesmosine in urine of chronic destructive lung disease patients

S Viglio, P Iadarola, A Lupi, R Trisolini, C Tinelli, B Balbi, V Grassi, D Worlitzsch, G Doring, F Meloni, KC Meyer, L Dowson, SL Hill, RA Stockley, M Luisetti
European Respiratory Journal 2000 15: 1039-1045; DOI:
S Viglio
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P Iadarola
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A Lupi
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R Trisolini
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C Tinelli
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B Balbi
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V Grassi
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D Worlitzsch
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G Doring
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F Meloni
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KC Meyer
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L Dowson
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SL Hill
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RA Stockley
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M Luisetti
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Abstract

Degradation of extracellular matrix components is central to many pathological features of chronic destructive lung disorders. Desmosine and isodesmosine are elastin-derived cross-linked amino acids whose urine levels are considered representative of elastin breakdown. The aim of this study was to apply a novel methodology, based on high-performance capillary electrophoresis, to the quantification of desmosine and isodesmosine in 11 patients with stable chronic obstructive pulmonary disease (COPD), 10 with an exacerbation of COPD, nine with alpha1-antitrypsin deficiency, 13 with bronchiectasis, and 11 adults with cystic fibrosis, in comparison to 24 controls. It was found that, in patients with stable COPD, urinary desmosine levels were higher than in controls (p=0.03), but lower than in COPD subjects with an exacerbation (p< or =0.05). The highest desmosine levels were found in subjects with alpha1-antitrypsin deficiency, bronchiectasis and cystic fibrosis (p<0.001 versus stable COPD). In a short-term longitudinal study, five stable COPD patients showed a constant rate of desmosine excretion (mean coefficient of variation <8% over three consecutive days). In conclusion, the present method is simple and suitable for the determination of elastin-derived cross-linked amino acid excretion in urine, giving results similar to those obtained using other separation methods. In addition, evidence is presented that urinary desmosine excretion is increased in conditions characterized by airway inflammation, such as exacerbations of chronic obstructive pulmonary disease, bronchiectasis and cystic fibrosis. Results obtained in subjects with alphal-antitrypsin deficiency suggest that this method might be used to evaluate the putative efficacy of replacement therapy.

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MEKC of desmosine and isodesmosine in urine of chronic destructive lung disease patients
S Viglio, P Iadarola, A Lupi, R Trisolini, C Tinelli, B Balbi, V Grassi, D Worlitzsch, G Doring, F Meloni, KC Meyer, L Dowson, SL Hill, RA Stockley, M Luisetti
European Respiratory Journal Jun 2000, 15 (6) 1039-1045;

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MEKC of desmosine and isodesmosine in urine of chronic destructive lung disease patients
S Viglio, P Iadarola, A Lupi, R Trisolini, C Tinelli, B Balbi, V Grassi, D Worlitzsch, G Doring, F Meloni, KC Meyer, L Dowson, SL Hill, RA Stockley, M Luisetti
European Respiratory Journal Jun 2000, 15 (6) 1039-1045;
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