Reference : The relationship between airways inflammation and asthma severity.
Scientific journals : Article
Human health sciences : Cardiovascular & respiratory systems
The relationship between airways inflammation and asthma severity.
Louis, Renaud mailto [Centre Hospitalier Universitaire de Liège - CHU > > Pneumologie-Allergologie >]
Lau, L. C. [> > > >]
Bron, A. O. [> > > >]
Roldaan, A. C. [> > > >]
Radermecker, Maurice [Université de Liège - ULg > > Pneumologie-Allergologie >]
Djukanovic, R. [> > > >]
American Journal of Respiratory & Critical Care Medicine
American Thoracic Society
Yes (verified by ORBi)
New York
[en] Adult ; Albumins/metabolism ; Asthma/drug therapy/metabolism/physiopathology ; Biological Markers ; Blood Proteins/metabolism ; Bronchial Hyperreactivity/drug therapy/metabolism/physiopathology ; Chymases ; Eosinophil Granule Proteins ; Eosinophils/metabolism/pathology ; Female ; Glucocorticoids/therapeutic use ; Humans ; Male ; Mast Cells/enzymology/pathology ; Methacholine Compounds/diagnostic use ; Neutrophils/enzymology/pathology ; Peroxidase/metabolism ; Respiratory Function Tests ; Ribonucleases ; Serine Endopeptidases/metabolism ; Severity of Illness Index ; Sputum/cytology/metabolism ; Tryptases
[en] In order to investigate the relationship between airways inflammation and disease severity, and improve the understanding of persistent asthma, 74 asthmatics, with disease severity ranging from intermittent, to mild to moderate and severe persistent (classified according to the Global Initiative for Asthma [GINA] guidelines), and 22 nonatopic control subjects were studied using the method of induced sputum. Sputum was analyzed for total and differential cell counts concentrations of albumin, and levels of eosinophil cationic protein (ECP), myeloperoxidase (MPO), and tryptase, inflammatory mediators reflecting eosinophil, neutrophil, and mast cell activation. Asthma severity (assessed by FEV(1), peak expiratory flow [PEF] variability, and daily symptom scores) and methacholine airways responsiveness were related to sputum eosinophilia and ECP. In addition, sputum neutrophilia and MPO levels correlated, albeit weakly, with PEF variability and symptom scores, respectively. Tryptase concentrations were raised in mild to moderate asthmatics. Albumin concentrations were significantly raised across the spectrum of asthma severity and correlated with those of tryptase and ECP. Despite treatment with either high doses of inhaled corticosteroids or oral corticosteroids, prominent eosinophilic inflammation with raised ECP was noted. This study points to persistent, disease severity-related airways inflammation in asthma, involving eosinophils, mast cells, and neutrophils, which is evident despite treatment with corticosteroids.

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