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Eur Respir J ; 37(3): 516-22, 2011 Mar.
Article in English | MEDLINE | ID: mdl-20595148

ABSTRACT

The soluble receptor for advanced glycation end-products (sRAGE) has anti-inflammatory properties, and deficiency of circulating sRAGE is associated with various human diseases. Whether sRAGE concentrations are reduced in chronic obstructive pulmonary disease (COPD) has not been determined. The aim of this study was to determine plasma levels of sRAGE in COPD patients and establish whether sRAGE varies in relation to forced expiratory volume in 1 s (FEV(1)) and other inflammatory markers. 61 COPD patients and 42 healthy controls were recruited. Plasma sRAGE, C-reactive protein (CRP) and serum amyloid A (SAA) were measured in patients with stable COPD. A subgroup had measurements during acute exacerbations of COPD (AECOPD). sRAGE was significantly lower in stable COPD than in healthy controls (p<0.001), while CRP (p<0.001) and SAA (p = 0.015) were higher in stable COPD than in healthy controls. Multiple linear regression confirmed that COPD was negatively associated with sRAGE (p<0.001). Plasma sRAGE was positively correlated with FEV(1) (r(2) = 0.530, p<0.001), while CRP and SAA were inversely proportional to FEV(1). Multiple linear regression analysis showed that only sRAGE was a strong predictor of FEV(1). AECOPD were associated with even lower sRAGE levels that increased with convalescence. Circulating sRAGE is lower in COPD and shows a strong correlation to the degree of airflow limitation.


Subject(s)
Gene Expression Regulation , Glycation End Products, Advanced/metabolism , Pulmonary Disease, Chronic Obstructive/metabolism , Receptor for Advanced Glycation End Products/metabolism , Aged , Biomarkers/metabolism , Case-Control Studies , Female , Forced Expiratory Volume , Humans , Inflammation , Male , Middle Aged , Respiratory Function Tests , Surveys and Questionnaires
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