Abstract Title:

Increased serum IL-17 is an independent risk factor for severe asthma.

Abstract Source:

Respir Med. 2010 Mar 23. Epub 2010 Mar 23. PMID: 20338742

Abstract Author(s):

Ioana Agache, Cristina Ciobanu, Costel Agache, Mariana Anghel

Article Affiliation:

Transylvania University, Faculty of Medicine, Department of Allergy and Clinical Immunology; B-ul Eroilor 29, Brasov 500036, Romania.

Abstract:

BACKGROUND: IL-17 expression was found to be associated with many inflammatory diseases in humans, such as rheumatoid arthritis, asthma, systemic lupus erythematosus and allograft rejection and many in vitro studies have indicated a proinflammatory function for IL-17. OBJECTIVE: Prognostic value of increased serum IL-17 in asthma patients. METHODS: Serum IL-17 (ELISA) was measured in 85 asthma patients (pts), mean age 46.99 +/- 14.1 years, 61% females, 23 mild persistent, 26 moderate persistent and 36 severe persistent asthma. Using multiple regression analysis (STATISTICA 7), increased serum IL-17 (>20 pg/ml) was tested as risk factor for severe asthma in comparison with "traditional" risk factors: smoke, NSAID intolerance, obesity, chronic rhinosinusitis, blood eosinophilia, FEV(1) at baseline<50% predicted (low FEV(1)). RESULTS: Medium serum IL-17 values were 14.21 pg/ml in mild asthma, 12.22 pg/ml in moderate asthma and 24.72 pg/ml in severe asthma. IL-17 values>20 pg/ml were encountered in 3(13%) mild asthma pts (p<0.001 vs. severe asthma), 2(8%) moderate asthma pts. (p<0.001 vs. severe asthma), and in 11(31%) severe asthma pts. For severe asthma multiple regression analysis revealed as independent risk factors IL-17 (p = 0.000290), NSAID intolerance (p = 0.000585) and low FEV(1) (p = 0.000059). CONCLUSIONS: IL-17 is increased in severe asthma compared to mild/moderate forms of the disease and values above 20 pg/ml are an independent risk factor for severe asthma.

Study Type : Human Study

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