title: Urinary excretion of protein and non-protein hydroxyproline in patients with sarcoidosis and interstitial pulmonary fibrosis.
abstract: The determination of total hydroxyproline (Hyp) with separation into protein and non-protein fractions was carried out in 24-hour urine samples of healthy persons, patients with sarcoidosis and patients with interstitial pulmonary fibrosis (i.p.f.). In the group of sarcoidosis Hyp excretion was evaluated taking into account progression of pulmonary changes and disease activity. It was found that total and non-protein Hyp excretion correlated positively in healthy persons as well as in those with sarcoidosis, and interstitial pulmonary fibrosis. An increased excretion of total and non-protein Hyp occurred in 24% of the patients with sarcoidosis while excretion of protein Hyp remained within the normal range. In 30% of the patients with interstitial pulmonary fibrosis increased excretion of total and non-protein Hyp was demonstrated. The excretion of protein Hyp in these patients did not deviate from normal values. The results of our study indicate that determination of total and nonprotein Hyp in urine may be useful in the evaluation of fibrotic changes in the pulmonary diseases mentioned above. However, these parameters are not usefull in differentiation between sarcoidosis and interstitial pulmonary fibrosis.
authors.affiliation: Department of Medical Analysis, Medical Academy, Wrocław, Poland.
authors.forename: B
authors.initials: B
authors.lastname: Podwysocki
authors.forename: J
authors.initials: J
authors.lastname: Zwoliński
authors.forename: E
authors.initials: E
authors.lastname: Szklarz
mesh_terms: D000328:Adult; D003094:Collagen / Q000378:metabolism; D005260:Female; D006801:Humans; D006909:Hydroxyproline / Q000652:urine*; D008297:Male; D008875:Middle Aged; D011507:Proteinuria / Q000209:etiology*; D011658:Pulmonary Fibrosis / Q000175:diagnosis / Q000652:urine*; D012507:Sarcoidosis / Q000175:diagnosis / Q000652:urine*
chemical_list: D003094:Collagen; D006909:Hydroxyproline