TY - JOUR
T1 - Airflow limitation in chronic bronchitis is associated with T-lymphocyte and macrophage infiltration of the bronchial mucosa
AU - Di Stefano, Antonino
AU - Turato, Graziella
AU - Maestrelli, Piero
AU - Mapp, Cristina E.
AU - Ruggieri, Maria Paola
AU - Roggeri, Alberto
AU - Boschetto, Piera
AU - Fabbri, Leonardo M.
AU - Saetta, Marina
PY - 1996
Y1 - 1996
N2 - To investigate whether the airway inflammatory process is different in patients with chronic bronchitis with airflow limitation and those with chronic bronchitis without airflow limitation, we obtained bronchial biopsies from 14 subjects with chronic sputum production and fixed airway obstruction, and from 10 subjects with chronic sputum production and normal FEV1, all with a history of cigarette smoking. Paraffin-embedded and frozen bronchial biopsies were examined by immunohistochemistry to identify the number of neutrophils (neutrophil-elastase), eosinophils (antieosinophil cationic protein [EG-2]), mast cells (tryptase), T-lymphocytes (CD3), T-lymphocyte subpopulations (CD4 and CD8), B-lymphocytes, and macrophages (CD68) in the submucosa. Subjects with chronic bronchitis with airflow limitation had a greater number of T-lymphocytes (p <0.01) and macrophages (p <0.05) than subjects with chronic bronchitis without airflow limitation, whereas the T- lymphocyte subpopulations and the numbers of B-lymphocytes, neutrophils, eosinophils, and mast cells were similar in the two groups. When all the subjects were considered together, the number of T-lymphocytes correlated inversely with the values of FEV1 (r = 0.46, p <0.02). In conclusion, airflow limitation in subjects with chronic bronchitis is associated with an increased number of T-lymphocytes and macrophages in the bronchial mucosa.
AB - To investigate whether the airway inflammatory process is different in patients with chronic bronchitis with airflow limitation and those with chronic bronchitis without airflow limitation, we obtained bronchial biopsies from 14 subjects with chronic sputum production and fixed airway obstruction, and from 10 subjects with chronic sputum production and normal FEV1, all with a history of cigarette smoking. Paraffin-embedded and frozen bronchial biopsies were examined by immunohistochemistry to identify the number of neutrophils (neutrophil-elastase), eosinophils (antieosinophil cationic protein [EG-2]), mast cells (tryptase), T-lymphocytes (CD3), T-lymphocyte subpopulations (CD4 and CD8), B-lymphocytes, and macrophages (CD68) in the submucosa. Subjects with chronic bronchitis with airflow limitation had a greater number of T-lymphocytes (p <0.01) and macrophages (p <0.05) than subjects with chronic bronchitis without airflow limitation, whereas the T- lymphocyte subpopulations and the numbers of B-lymphocytes, neutrophils, eosinophils, and mast cells were similar in the two groups. When all the subjects were considered together, the number of T-lymphocytes correlated inversely with the values of FEV1 (r = 0.46, p <0.02). In conclusion, airflow limitation in subjects with chronic bronchitis is associated with an increased number of T-lymphocytes and macrophages in the bronchial mucosa.
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M3 - Article
C2 - 8564109
AN - SCOPUS:0030061718
VL - 153
SP - 629
EP - 632
JO - American Journal of Respiratory and Critical Care Medicine
JF - American Journal of Respiratory and Critical Care Medicine
SN - 1073-449X
IS - 2
ER -