Content of Markers of Respiratory Tract Remodeling in Exhaled Breath Condensate in Children Suffering from Bronchial Asthma

Abstract

This study investigated to detect the content of remodeling markers of the respiratory tract in the exhaled breath condensate (EBC) of children with bronchial asthma (BA). Materials and Methods: The study was in clinical groups of children with BA were formed on the indices in sputum supernatant: the Group I ‑ “a high risk group” of bronchial remodeling (37 patients with vascular endothelial growth factor (VEGF) more than 80 ng/ml, and matrix metalloproteinase‑9 (MMP‑9) more than 5.2 ng/ml), the Group ІІ ‑ “a moderate risk” of bronchial remodeling (41 patients with VEGF more than 80 ng/ml, and MMP‑9 <5.2 ng/ml, or VEGF <80 ng/ml, and MMP‑9 more than 5.2 ng/ml), the Group ІІІ ‑ “a low risk” of bronchial remodeling (38 patients with VEGF did not achieve 80 ng/ml, and ММР‑9 <5.2 ng/ml). Results: The results obtained enable to believe that in EBC of children with a high risk of bronchial remodeling was higher azoalbumin olysis (1.8 ml/h comparison of Group II ‑ 1.5 ml/h, P = 0.038, and Group III ‑ 1.4 ml/h, P = 0.007), high catalase activity (81.26 comparison of other group ‑ 50.7, P = 0.06, and 47.07, P = 0.052 μmol/min/mg of protein). Furthermore, in the clinical Group I, the content of nitrogen monoxide metabolites (53.5 mcmol/L) comparison of Group II of children (48.7 mcmol/L, P = 0.28) and the Group III (41.7 mcmol/L, P = 0.085). Conclusions: In children with a “high risk” of respiratory tract remodeling more significant inflammatory process in the bronchi is found than in children with a “low risk.”