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Anti-inflammatory deficiencies in neutrophilic asthma: reduced galectin-3 and IL-1RA/IL-1β.
- Source :
- Respiratory Research; 2015, Vol. 16 Issue 1, p1-10, 10p, 6 Charts, 1 Graph
- Publication Year :
- 2015
-
Abstract
- Background: Galectin-3 (gal-3), a member of the β-galactoside-binding animal lectins, is involved in the recruitment, activation and removal of neutrophils. Neutrophilic asthma is characterized by a persistent elevation of airway neutrophils and impaired efferocytosis. We hypothesized that sputum gal-3 would be reduced in neutrophilic asthma and the expression of gal-3 would be associated with other markers of neutrophilic inflammation. Methods: Adults with asthma (n = 80) underwent a sputum induction following clinical assessment and blood collection. Sputum was dispersed for a differential cell count and ELISA assessment of gal-3, gal-3 binding protein (BP), interleukin (IL)-1β, IL-1 receptor antagonist (RA), IL-8 and IL-6. Gal-3 and gal-3BP immunoreactivity were assessed in mixed sputum cells. Results: Sputum gal-3 (median, (q1,q3)) was significantly reduced in neutrophilic asthma (183 ng/mL (91,287)) compared with eosinophilic (293 ng/mL (188,471), p = 0.021) and paucigranulocytic asthma (399 ng/mL (213,514), p = 0.004). The gal-3/gal-3BP ratio and IL-1RA/IL-1β ratio were significantly reduced, while gal-3BP and IL-1β were significantly elevated in neutrophilic asthma compared with eosinophilic and paucigranulocytic asthma. Conclusion: Patients with neutrophilic asthma have impairment in anti-inflammatory ratio of gal-3/gal-3BP and IL-1RA/IL-1β which provides a further framework for exploration into pathologic mechanisms of asthma phenotypes. [ABSTRACT FROM AUTHOR]
- Subjects :
- GALECTINS
ASTHMA -- Immunological aspects
GALACTOSIDES
NEUTROPHILS
SPUTUM
Subjects
Details
- Language :
- English
- ISSN :
- 14659921
- Volume :
- 16
- Issue :
- 1
- Database :
- Complementary Index
- Journal :
- Respiratory Research
- Publication Type :
- Academic Journal
- Accession number :
- 101777655
- Full Text :
- https://doi.org/10.1186/s12931-014-0163-5