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• W3203387478 abstract "The aim is to study the relationship between the level of exhaled nitric oxide (FeNO) and the activity of the fibrogenic cytokine TGF-β1 in blood serum and brush biopsy samples of bronchial mucosa in order to determine their role in the development of irreversible morphological and functional changes in smoking adolescents. Materials and methods. 20 adolescent smokers with chronic bronchitis (CB) (average age – 17.5 ± 0.2 years) were exa­mined. The comparison group consisted of 37 adolescent smokers without respiratory symptoms (average age – 15.9 ± 0.2 years) and 15 healthy adolescents, who never smoked (average age – 15.9 ± 0.4 years). In adolescent smokers the tobacco smoking status was assessed. To confirm active smoking, the nicotine metabolite cotinine was determined in urine. Instrumental methods included spirometry, chest X-ray, tracheobronchoscopy. The FeNO level was measured using a Niox Mino. TGF-β1 level was determined in the blood serum and brush biopsy samples of the bronchial mucosa. Results. The FeNO levels were significantly lower in adolescent smokers with CB in comparison with adolescent smokers without respiratory symptoms (6.1 ± 0.3 ppb versus 8.8 ± 0.6 ppb, P < 0.05). The relationship between the FeNO levels and indicators of the tobacco smoking status has been established in patients with CB and in asymptomatic smokers. There was a significant increase in the TGF-β1 levels in the blood serum in patients with CB compared with asymptomatic smokers (478.7 ± 57.9 pg/ml versus 231.5 ± 23.5 pg/ml, P < 0.05). In smoking adolescents a relationship between a FeNO level and an increased activity of the fibrogenic cytokine TGF-β (r = -0.63; P < 0.05) has been established. In one third of patients the TGF-β1 factor was identified in the bronchial endothelium. The presence of this factor in the bronchial endothelium is a serious prognostic criterion for the risk of developing “inadequate” pneumofibrosis, which can lead to irreversible remodeling processes in the bronchi. Conclusions. Determination of FeNO levels and TGF-β1 in the blood serum in smoking adolescents has a reliable diagnostic value for determining the risk group for the development of irreversible morphological and functional changes in the bronchi and can improve the efficiency of early diagnosis of chronic respiratory pathology." @default.
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• W3203387478 date "2021-08-20" @default.
• W3203387478 modified "2023-10-18" @default.
• W3203387478 title "Relationship between nitric oxide levels and the activity of fibrogenic cytokine TGF-β1 and their role in diagnostics of the development of irreversible morphofunctional changes in bronchi of smoking adolescents" @default.
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• W3203387478 doi "https://doi.org/10.14739/2310-1237.2021.2.225193" @default.
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