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Relationship between Sputum Clusterin Levels and Childhood Asthma.

 I. S. Sol  ;  Y. H. Kim  ;  Y. A. Park  ;  K. E. Lee  ;  J. Y. Hong  ;  M. N. Kim  ;  Y. S. Kim  ;  M. S. Oh  ;  S. H. Yoon  ;  M. J. Kim  ;  K. W. Kim  ;  M. H. Sohn  ;  K. E. Kim 
 Clinical and Experimental Allergy, Vol.46(5) : 688-695, 2016 
Journal Title
 Clinical and Experimental Allergy 
Issue Date
Adolescent ; Asthma/diagnosis ; Asthma/immunology* ; Asthma/metabolism* ; Biomarkers ; Bronchial Provocation Tests ; Case-Control Studies ; Child ; Child, Preschool ; Clusterin/metabolism* ; Disease Progression ; Eosinophils ; Female ; Forced Expiratory Volume ; Humans ; Leukocyte Count ; Male ; Spirometry ; Sputum/metabolism*
airway inflammation ; asthma exacerbation ; clusterin ; stable asthma
BACKGROUND: Clusterin is a sensitive cellular biosensor of oxidative stress and has been studied as a biomarker for inflammation-associated diseases. Clusterin levels in childhood asthma have not been evaluated. OBJECTIVES: (1) To evaluate sputum clusterin levels in children with asthma compared to a control group. (2) To assess the relationships between sputum clusterin levels and airway inflammation, pulmonary function, and bronchial hyperresponsiveness. METHODS: This study included 170 children aged 5-18 years with stable asthma (n = 91), asthma exacerbation (n = 29), or no asthma (healthy controls; n = 50). Induced sputum, pulmonary function, and methacholine challenge tests were performed. Stable asthma was classified into two groups according to the severity. Clusterin levels in sputum were measured using an enzyme-linked immunosorbent assay. RESULTS: Children with stable asthma had a higher clusterin level than healthy controls [4540 (3872-5651) pg/mL vs. 3857 (1054-4369) pg/mL, P < 0.001]. The clusterin level was also more elevated in eosinophil-dominant sputum than in non-eosinophilic sputum in stable asthma [5094 (4243-6257) pg/mL vs. 4110 (1871-4839) pg/mL, P = 0.0017]. Clusterin levels were associated with asthma severity. Paradoxically, clusterin levels were lower during asthma exacerbation than in stable asthma [1838 (350-4790] pg/mL vs. 4540 (3872-5651) pg/mL, P < 0.001]. Clusterin levels were strongly correlated with the methacholine concentration that caused a 20% decrease in the forced expiratory volume in 1 s (r = -0.617, P < 0.001); there was no significant correlation between clusterin levels and other pulmonary function parameters. CONCLUSIONS AND CLINICAL RELEVANCE: Clusterin levels were altered in children with stable asthma and asthma exacerbation because of its antioxidant and anti-inflammatory effects. Clusterin may be a marker that reflects airway inflammation and severity of symptoms, and it can be used in the assessment and management of childhood asthma.
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1. College of Medicine (의과대학) > Dept. of Pediatrics (소아청소년과학교실) > 1. Journal Papers
Yonsei Authors
김경원(Kim, Kyung Won) ORCID logo https://orcid.org/0000-0003-4529-6135
김규언(Kim, Kyu Earn)
김민정(Kim, Min Jung) ORCID logo https://orcid.org/0000-0002-5634-9709
김윤희(Kim, Yoon Hee) ORCID logo https://orcid.org/0000-0002-2149-8501
박영아(Park, Young A)
설인숙(Sol, In Suk) ORCID logo https://orcid.org/0000-0003-2470-9682
손명현(Sohn, Myung Hyun) ORCID logo https://orcid.org/0000-0002-2478-487X
윤서희(Yoon, Seo Hee) ORCID logo https://orcid.org/0000-0002-8361-9815
홍정연(Hong, Jung Yeon) ORCID logo https://orcid.org/0000-0003-0406-9956
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