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Comparison of leukocyte populations from bronchoalveolar lavage and induced sputum in the evaluation of cellular composition and nitric oxide production in patients with bronchial asthma.
Arch. Immunol. Ther. Exp. 2002: 50 (1) s.75-82, il., tab., bibliogr. 34 poz.
Hasła klasyfikacyjne GBL:
dorośli 19-44 r.ż.
dorośli 45-64 r.ż.
dorośli = 65 r.ż.
Bronchoalveolar lavage (BAL) or induced sputum (IS) techniques may provide lukocytes for the evaluation of airway inflammatory response in bronchial asthma. The aim of the present study was to compare features of leukocyte populations obtained by the two diffrent methods regarding the cell types and their activity in patients with bronchial asthma. The nitric oxide (NO) level released from the cells was measured as a marker of their activity. Pulmonary leukocytes were obtained from the BAL and IS of 11 asthmatic patients in stable condition at the time of the study. The BAL and IS leukocyte populations varied in cell count and NO production. Macrophages were the predominant leukocyte population in BAL (median (ME) = 83.0 p.c., range 67.9 - 88.4 p.c.), whereas sputum sediments were found to consist mainly of neutrophils (Me = 55.7 p.c., range 29.0 - 64.9 p.c.). The IS leukocytes released much more NO (p = 0.0022) than the BAL leukocytes released much more NO (p=0.0022) than the BAL leukocytes. In spite of these quantitative differences, a similar pattern of NO production was observed in BAL and in IS cells. Both BAL and IS leukocyte populations producted almost the same amounts of NO before and after lipopolysaccharide stimulation (p=0.9063, p= 0.4801, respectively). Furthermore, a slight positive correlation Spearman's rank (Rs)=0.5578, p=0.0594) was noticed between the neutrophil percentages and NO levels produced by BAL cells, whereas in IS a statistically significant correlation between the percentage of neutrophils and the levels of NO (Rs=0.6643, p=0.0184) was observed...
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