desmosine has been researched along with Hyperoxia* in 2 studies
2 other study(ies) available for desmosine and Hyperoxia
Article | Year |
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Cathepsin S deficiency confers protection from neonatal hyperoxia-induced lung injury.
Bronchopulmonary dysplasia (BPD) is a chronic lung disease that adversely affects long-term pulmonary function as well as neurodevelopmental outcomes of preterm infants. Elastolytic proteases have been implicated in the pathogenesis of BPD. Cathepsin S (cat S) is a cysteine protease with potent elastolytic activity. Increased levels and activity of cat S have been detected in a baboon model of BPD.. To investigate whether deficiency of cat S alters the course of hyperoxia-induced neonatal lung injury in mice.. Newborn wild-type and cat S-deficient mice were exposed to 80% oxygen for 14 days. Histologic and morphometric analysis were performed and bronchoalveolar lavage protein and cells were analyzed. Lung elastin was assessed by real-time polymerase chain reaction, in situ hybridization, desmosine analysis, and Hart's stain. Distribution of myofibroblasts was analyzed by immunofluorescence. Hydroxyproline content of lung tissues was measured.. Hyperoxia-exposed cat S-deficient mice were protected from growth restriction and had improved alveolarization, decreased septal wall thickness, lower number of macrophages, and lower protein concentration in bronchoalveolar lavage fluid. alpha-Smooth muscle actin-expressing myofibroblasts accounted for at least some of the increased interstitial cellularity in hyperoxia-exposed mouse lungs and were significantly less in cat S-deficient lungs. Lung hydroxyproline content was increased in hyperoxia-exposed wild-type, but not in cat S-deficient lungs. Desmosine content was significantly reduced in both genotypes with hyperoxia.. Cathepsin S deficiency improves alveolarization, and attenuates macrophage influx and fibroproliferative changes in hyperoxia-induced neonatal mouse lung injury. Topics: Animals; Animals, Newborn; Bronchoalveolar Lavage Fluid; Bronchopulmonary Dysplasia; Cathepsins; Collagen; Desmosine; Disease Models, Animal; Elastin; Humans; Hydroxyproline; Hyperoxia; Infant, Newborn; Lung; Lung Injury; Macrophages, Alveolar; Mice; Proteins; Pulmonary Alveoli; RNA, Messenger | 2007 |
Measurement of urinary desmosine as an indicator of acute pulmonary disease.
A modified radioimmunoassay (RIA) for desmosine in the urine was investigated as a tool for the rapid estimation of lung elastin catabolism. Cystic fibrosis (CF) and oxygen toxicity were chosen as conditions that might show altered elastin destruction. Using an antibody bound to magnetic particles the RIA was adapted to handle large numbers of samples requiring only 50 microliters or urine. The experiments show that it was not necessary to hydrolyze or extract the urine prior to assay and that collecting spot urines and normalizing the data to urine creatinine gives the same interpretation of the data as total desmosine in a 24-hour collection. Urine desmosine levels were elevated in 10 of 16 patients with CF; however, daily fluctuations were considerable in some subjects, varying as much as 5-fold and underlining the importance of assaying several consecutive days of urine in acute disorders for an accurate estimate of desmosine excretion. The RIA for desmosine is a rapid and sensitive assay that requires no sample preparation and could be applied to clinical situations that require large numbers of samples. Topics: Acute Disease; Adolescent; Adult; Child; Child, Preschool; Cystic Fibrosis; Desmosine; Humans; Hyperoxia; Male; Radioimmunoassay; Sensitivity and Specificity | 1995 |