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Oxidative stress and airway inflammation in severe exacerbations of COPD.
Thorax. 2005 Apr; 60(4):293-300.T

Abstract

BACKGROUND

A study was undertaken to assess both oxidative stress and inflammation in the lungs of patients with chronic obstructive pulmonary disease (COPD) during severe and very severe exacerbations compared with those with stable COPD, healthy smokers, and non-smokers. Two sites within the lungs were compared: the large airways (in sputum) and the peripheral airways (by bronchoalveolar lavage (BAL)).

METHODS

BAL fluid cell numbers and levels of tumour necrosis factor (TNFalpha) and interleukin (IL)-8 were measured as markers of airway inflammation and glutathione (GSH) levels as a marker of antioxidant status. Nuclear translocation of the pro-inflammatory transcription factors nuclear factor-kappaB (NF-kappaB) and activator protein 1 (AP-1) were also measured by electromobility shift assay in BAL fluid leucocytes and lung biopsy samples.

RESULTS

Influx of inflammatory cells into the peripheral airways during exacerbations of COPD was confirmed. Increased IL-8 levels were detected in BAL fluid from patients with stable COPD compared with non-smokers and healthy smokers, with no further increase during exacerbations. In contrast, IL-8 levels in the large airways increased during exacerbations. GSH levels were increased in the BAL fluid of smokers (444%) and patients with stable COPD (235%) compared with non-smokers and were reduced during exacerbations (severe 89.2%; very severe 52.3% compared with stable COPD). NF-kappaB DNA binding in BAL leucocytes was decreased in healthy smokers compared with non-smokers (41.3%, n = 9, p<0.001) but did not differ in COPD patients, whereas AP-1 DNA binding was significantly decreased during exacerbations of COPD.

CONCLUSION

There is evidence of increased oxidative stress in the airways of patients with COPD that is increased further in severe and very severe exacerbations of the disease. This is associated with increased neutrophil influx and IL-8 levels during exacerbations.

Authors+Show Affiliations

ELEGI Laboratory, MRC Centre for Inflammation Research, University of Edinburgh, Medical School, Teviot Place, Edinburgh EH8 9AG, UK. Ellen.Drost@ed.ac.ukNo affiliation info availableNo affiliation info availableNo affiliation info availableNo affiliation info availableNo affiliation info availableNo affiliation info available

Pub Type(s)

Journal Article
Research Support, Non-U.S. Gov't

Language

eng

PubMed ID

15790984

Citation

Drost, E M., et al. "Oxidative Stress and Airway Inflammation in Severe Exacerbations of COPD." Thorax, vol. 60, no. 4, 2005, pp. 293-300.
Drost EM, Skwarski KM, Sauleda J, et al. Oxidative stress and airway inflammation in severe exacerbations of COPD. Thorax. 2005;60(4):293-300.
Drost, E. M., Skwarski, K. M., Sauleda, J., Soler, N., Roca, J., Agusti, A., & MacNee, W. (2005). Oxidative stress and airway inflammation in severe exacerbations of COPD. Thorax, 60(4), 293-300.
Drost EM, et al. Oxidative Stress and Airway Inflammation in Severe Exacerbations of COPD. Thorax. 2005;60(4):293-300. PubMed PMID: 15790984.
* Article titles in AMA citation format should be in sentence-case
TY - JOUR T1 - Oxidative stress and airway inflammation in severe exacerbations of COPD. AU - Drost,E M, AU - Skwarski,K M, AU - Sauleda,J, AU - Soler,N, AU - Roca,J, AU - Agusti,A, AU - MacNee,W, PY - 2005/3/26/pubmed PY - 2005/4/21/medline PY - 2005/3/26/entrez SP - 293 EP - 300 JF - Thorax JO - Thorax VL - 60 IS - 4 N2 - BACKGROUND: A study was undertaken to assess both oxidative stress and inflammation in the lungs of patients with chronic obstructive pulmonary disease (COPD) during severe and very severe exacerbations compared with those with stable COPD, healthy smokers, and non-smokers. Two sites within the lungs were compared: the large airways (in sputum) and the peripheral airways (by bronchoalveolar lavage (BAL)). METHODS: BAL fluid cell numbers and levels of tumour necrosis factor (TNFalpha) and interleukin (IL)-8 were measured as markers of airway inflammation and glutathione (GSH) levels as a marker of antioxidant status. Nuclear translocation of the pro-inflammatory transcription factors nuclear factor-kappaB (NF-kappaB) and activator protein 1 (AP-1) were also measured by electromobility shift assay in BAL fluid leucocytes and lung biopsy samples. RESULTS: Influx of inflammatory cells into the peripheral airways during exacerbations of COPD was confirmed. Increased IL-8 levels were detected in BAL fluid from patients with stable COPD compared with non-smokers and healthy smokers, with no further increase during exacerbations. In contrast, IL-8 levels in the large airways increased during exacerbations. GSH levels were increased in the BAL fluid of smokers (444%) and patients with stable COPD (235%) compared with non-smokers and were reduced during exacerbations (severe 89.2%; very severe 52.3% compared with stable COPD). NF-kappaB DNA binding in BAL leucocytes was decreased in healthy smokers compared with non-smokers (41.3%, n = 9, p<0.001) but did not differ in COPD patients, whereas AP-1 DNA binding was significantly decreased during exacerbations of COPD. CONCLUSION: There is evidence of increased oxidative stress in the airways of patients with COPD that is increased further in severe and very severe exacerbations of the disease. This is associated with increased neutrophil influx and IL-8 levels during exacerbations. SN - 0040-6376 UR - https://www.unboundmedicine.com/medline/citation/15790984/Oxidative_stress_and_airway_inflammation_in_severe_exacerbations_of_COPD_ L2 - https://thorax.bmj.com/lookup/pmidlookup?view=long&amp;pmid=15790984 DB - PRIME DP - Unbound Medicine ER -