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Correlation between levels of exhaled hydrogen sulfide and airway inflammatory phenotype in patients with chronic persistent asthma.
MedLine Citation:
PMID:  25168466     Owner:  NLM     Status:  Publisher    
BACKGROUND AND OBJECTIVE: Endogenous hydrogen sulfide (H2 S) may be a biomarker of asthma severity and activity. However, the relationship between exhaled H2 S and airway inflammation phenotypes in asthma remains unclear. This study examined associations between endogenous H2 S and chronic airway inflammatory phenotypes in patients with chronic persistent asthma.
METHODS: One hundred forty-eight patients (47 males, 101 females, 47.4 ± 15.3 years old) with chronic persistent asthma were enrolled. Induced sputum cells were examined, and patients were grouped according to sputum inflammatory cell composition. Baseline demographics, Asthma Control Test (ACT) scores, spirometry data and H2 S levels in exhaled air and plasma were obtained for all patients.
RESULTS: The eosinophilic, neutrophilic, mixed granulocytic and paucigranulocytic inflammation groups included 57 (38.5%), 28 (18.9%), 23 (15.5%) and 40 (27%) subjects, respectively. The paucigranulocytic group had the best lung function, and patients with eosinophilic inflammation had lower ACT scores than patients with paucigranulocytic findings. In the eosinophilic group, lower exhaled H2 S were found and exhaled H2 S levels were negatively correlated with sputum eosinophil counts (R = -0.428, P < 0.01). Exhaled H2 S levels were positively correlated with percent of predicted forced expiratory volume in 1 s (R = 0.567, P < 0.01) and ACT score (R = 0.519, P < 0.01).
CONCLUSIONS: Exhaled H2 S may be a useful marker of airway inflammation in asthma.
Jing Zhang; Xinmao Wang; Yahong Chen; Wanzhen Yao
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Publication Detail:
Type:  JOURNAL ARTICLE     Date:  2014-8-28
Journal Detail:
Title:  Respirology (Carlton, Vic.)     Volume:  -     ISSN:  1440-1843     ISO Abbreviation:  Respirology     Publication Date:  2014 Aug 
Date Detail:
Created Date:  2014-8-29     Completed Date:  -     Revised Date:  -    
Medline Journal Info:
Nlm Unique ID:  9616368     Medline TA:  Respirology     Country:  -    
Other Details:
Languages:  ENG     Pagination:  -     Citation Subset:  -    
Copyright Information:
© 2014 Asian Pacific Society of Respirology.
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