Document Detail

Interleukin-6 and interleukin-8 blood levels' poor association with the severity and clinical profile of ex-smokers with COPD.
MedLine Citation:
PMID:  25114519     Owner:  NLM     Status:  In-Data-Review    
BACKGROUND: The role of interleukins in the severity and clinical profile of chronic obstructive pulmonary disease (COPD) is not known, but evidence supports the contribution of systemic inflammation to disease pathophysiology. This study evaluated the relationship of serum biomarkers to the severity and clinical parameters of COPD.
METHODS AND FINDINGS: Serum levels of high-sensitivity C-reactive protein, interleukin-6 (IL-6), and interleukin-8 (IL-8) were measured in 50 patients with stable COPD and in 16 controls. The levels of these biomarkers were compared with parameters of severity, such as the grading of flow obstruction using the recommendations of the Global initiative for chronic Obstructive Lung Disease, the BMI (body mass index), obstruction, dyspnea, exercise capacity (health index) index, the number of exacerbations within the last year, and peripheral oxygen saturation after the six-minute walk test, and with clinical parameters, such as bronchitis and non-bronchitis phenotypes, the number of associated comorbidities, and the smoking burden. COPD patients exhibited higher levels of IL-6 and IL-8 compared to the control group. Higher levels of IL-6 occurred in COPD groups with body mass index <21 kg/m(2), with more than two exacerbations in the past year, with a higher smoking burden, and with bronchitis. The increase in serum IL-8 was found only in the group with the highest number of exacerbations within the previous year.
CONCLUSION: Increased IL-6 was mainly associated with smoking burden, in patients who had smoked for more than 30 pack-years and exhibited a bronchitis phenotype. No direct association was observed for both IL-6 and IL-8 blood levels with the severity of COPD in ex-smokers.
Maria Rosedália de Moraes; Adeliane Castro da Costa; Krislainy de Sousa Corrêa; Ana Paula Junqueira-Kipnis; Marcelo Fouad Rabahi
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Publication Detail:
Type:  Journal Article     Date:  2014-07-29
Journal Detail:
Title:  International journal of chronic obstructive pulmonary disease     Volume:  9     ISSN:  1178-2005     ISO Abbreviation:  Int J Chron Obstruct Pulmon Dis     Publication Date:  2014  
Date Detail:
Created Date:  2014-08-12     Completed Date:  -     Revised Date:  -    
Medline Journal Info:
Nlm Unique ID:  101273481     Medline TA:  Int J Chron Obstruct Pulmon Dis     Country:  New Zealand    
Other Details:
Languages:  eng     Pagination:  735-43     Citation Subset:  IM    
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