Tags

Type your tag names separated by a space and hit enter

Cellular and molecular mechanisms in chronic obstructive pulmonary disease: an overview.
Clin Exp Allergy. 2004 Aug; 34(8):1156-67.CE

Abstract

In the last decade, the analysis of bronchial biopsies and lung parenchyma obtained from chronic obstructive pulmonary disease (COPD) patients compared with those from smokers with normal lung function and non-smokers has provided new insights on the role of the different inflammatory and structural cells, their signalling pathways and mediators, contributing to a better knowledge of the pathogenesis of COPD. This review summarizes and discusses the lung pathology of COPD patients with emphasis on inflammatory cell phenotypes that predominate in different clinical conditions. In bronchial biopsies, a cascade of events takes place during progression from mild-to-severe disease. T lymphocytes, particularly CD8+ cells and macrophages are the prevalent inflammatory cells in the lung of healthy smokers and patients with mild COPD, while total and activated neutrophils predominate in severe COPD. The number of CD4+, CD8+ cells and macrophages expressing nuclear factor-kappa B (NF-kappaB), STAT-4 and IFN-gamma proteins as well as endothelial adhesion molecule-1 in endothelium is increased in mild/moderate disease. In contrast, activated neutrophils (MPO+ cells) and increased nitrotyrosine immunoreactivity develops in severe COPD. In bronchial biopsies obtained during COPD exacerbations, some studies have shown an increased T cell and granulocyte infiltration. Regular treatment with high doses of inhaled glucocorticoids does not significantly change the number of inflammatory cells in bronchial biopsies from patients with moderate COPD. The profile in lung parenchyma is similar to bronchial biopsies. 'Healthy' smokers and mild/moderate diseased patients show increased T lymphocyte infiltration in the peripheral airways. Pulmonary emphysema is associated with a general increase of inflammatory cells in the alveolar septa. The molecular mechanisms driving the lymphocyte and neutrophilic prevalence in mild and severe disease, respectively, needs to be extensively studied. Up-regulation of pro-inflammatory transcription factors NF-kappaB and STAT-4 in mild, activated epithelial and endothelial cells in the more severe disease may contribute to this differential prevalence of infiltrating cells.

Authors+Show Affiliations

Salvatore Maugeri Foundation, IRCCS, Medical Center of Rehabilitation, Division of Pulmonary Disease, Veruno (NO), Italy. adistefano@fsm.itNo affiliation info availableNo affiliation info availableNo affiliation info availableNo affiliation info availableNo affiliation info available

Pub Type(s)

Comparative Study
Journal Article
Review

Language

eng

PubMed ID

15298554

Citation

Di Stefano, A, et al. "Cellular and Molecular Mechanisms in Chronic Obstructive Pulmonary Disease: an Overview." Clinical and Experimental Allergy : Journal of the British Society for Allergy and Clinical Immunology, vol. 34, no. 8, 2004, pp. 1156-67.
Di Stefano A, Caramori G, Ricciardolo FL, et al. Cellular and molecular mechanisms in chronic obstructive pulmonary disease: an overview. Clin Exp Allergy. 2004;34(8):1156-67.
Di Stefano, A., Caramori, G., Ricciardolo, F. L., Capelli, A., Adcock, I. M., & Donner, C. F. (2004). Cellular and molecular mechanisms in chronic obstructive pulmonary disease: an overview. Clinical and Experimental Allergy : Journal of the British Society for Allergy and Clinical Immunology, 34(8), 1156-67.
Di Stefano A, et al. Cellular and Molecular Mechanisms in Chronic Obstructive Pulmonary Disease: an Overview. Clin Exp Allergy. 2004;34(8):1156-67. PubMed PMID: 15298554.
* Article titles in AMA citation format should be in sentence-case
TY - JOUR T1 - Cellular and molecular mechanisms in chronic obstructive pulmonary disease: an overview. AU - Di Stefano,A, AU - Caramori,G, AU - Ricciardolo,F L M, AU - Capelli,A, AU - Adcock,I M, AU - Donner,C F, PY - 2004/8/10/pubmed PY - 2004/12/21/medline PY - 2004/8/10/entrez SP - 1156 EP - 67 JF - Clinical and experimental allergy : journal of the British Society for Allergy and Clinical Immunology JO - Clin Exp Allergy VL - 34 IS - 8 N2 - In the last decade, the analysis of bronchial biopsies and lung parenchyma obtained from chronic obstructive pulmonary disease (COPD) patients compared with those from smokers with normal lung function and non-smokers has provided new insights on the role of the different inflammatory and structural cells, their signalling pathways and mediators, contributing to a better knowledge of the pathogenesis of COPD. This review summarizes and discusses the lung pathology of COPD patients with emphasis on inflammatory cell phenotypes that predominate in different clinical conditions. In bronchial biopsies, a cascade of events takes place during progression from mild-to-severe disease. T lymphocytes, particularly CD8+ cells and macrophages are the prevalent inflammatory cells in the lung of healthy smokers and patients with mild COPD, while total and activated neutrophils predominate in severe COPD. The number of CD4+, CD8+ cells and macrophages expressing nuclear factor-kappa B (NF-kappaB), STAT-4 and IFN-gamma proteins as well as endothelial adhesion molecule-1 in endothelium is increased in mild/moderate disease. In contrast, activated neutrophils (MPO+ cells) and increased nitrotyrosine immunoreactivity develops in severe COPD. In bronchial biopsies obtained during COPD exacerbations, some studies have shown an increased T cell and granulocyte infiltration. Regular treatment with high doses of inhaled glucocorticoids does not significantly change the number of inflammatory cells in bronchial biopsies from patients with moderate COPD. The profile in lung parenchyma is similar to bronchial biopsies. 'Healthy' smokers and mild/moderate diseased patients show increased T lymphocyte infiltration in the peripheral airways. Pulmonary emphysema is associated with a general increase of inflammatory cells in the alveolar septa. The molecular mechanisms driving the lymphocyte and neutrophilic prevalence in mild and severe disease, respectively, needs to be extensively studied. Up-regulation of pro-inflammatory transcription factors NF-kappaB and STAT-4 in mild, activated epithelial and endothelial cells in the more severe disease may contribute to this differential prevalence of infiltrating cells. SN - 0954-7894 UR - https://www.unboundmedicine.com/medline/citation/15298554/Cellular_and_molecular_mechanisms_in_chronic_obstructive_pulmonary_disease:_an_overview_ L2 - https://onlinelibrary.wiley.com/resolve/openurl?genre=article&sid=nlm:pubmed&issn=0954-7894&date=2004&volume=34&issue=8&spage=1156 DB - PRIME DP - Unbound Medicine ER -