Takashi Inoue1,2, Kenichi Akashi1, Masako Watanabe1, Yuichi Ikeda3, Shuichi Ashizuka4, Takanori Motoki1, Ryohei Suzuki5, Nagatoshi Sagara5, Noriyuki Yanagida2, Sakura Sato6, Motohiro Ebisawa6, Shoichiro Ohta7, Jyunya Ono8, Kenji Izuhara9, Toshio Katsunuma1. 1. Department of Pediatrics, Jikei University Daisan Hospital, Tokyo, Japan. 2. Department of Pediatrics, Sagamihara National Hospital, Kanagawa, Japan. 3. Central Clinical Laboratory, Jikei University Hospital, Tokyo, Japan. 4. Department of Surgery, Division of Pediatric Surgery, Jikei University School of Medicine, Tokyo, Japan. 5. Department of Pediatrics, Jikei University School of Medicine, Tokyo, Japan. 6. Department of Allergy, Clinical Research Center for Allergy and Rheumatology, Sagamihara National Hospital, Kanagawa, Japan. 7. Department of Laboratory Medicine, Saga Medical School, Saga, Japan. 8. Shino-Test Corporation, Kanagawa, Japan. 9. Division of Medical Biochemistry, Department of Biomolecular Sciences, Saga Medical School, Saga Japan.
Abstract
BACKGROUND: There are some biomarkers for asthma diagnosis but they are often difficult in clinical use, particularly in pediatric cases. Periostin is an extracellular matrix protein, upregulated in response to IL-4 or IL-13. Serum periostin is expected to be used as a non-invasive biomarker for asthma diagnosis and management. METHODS: Twenty-eight children with asthma (BA) and 27 children without asthma (patients with pectus excavatum, etc. as control group) aged 6-16 years were included. Bronchial asthma was diagnosed according to International Study of Asthma and Allergies in Childhood (ISAAC) questionnaire. Fractional exhaled nitric oxide (FeNO), lung function, blood eosinophil counts, total immunoglobulin E (IgE) levels, and serum periostin levels were assessed. Results were compared between BA and controls. Asthma diagnostic accuracies were calculated using receiver operating characteristics (ROC) curve analyses. RESULTS: Serum periostin levels in the BA group were significantly higher than those in the control group [medians (with interquartile ranges), 134.0 (116.3-166.3) vs. 112.0 (97.0-132.0) ng/ml; p = 0.012]. The area under the ROC curve (AUC) for periostin, FeNO, and eosinophil counts were 0.70, 0.72, and 0.84, respectively. After the exclusion of controls with pectus excavatum, AUC for periostin, forced expiratory volume in 1 s (FEV1 ), and maximum mid-expiratory flow rate (MMF) were 0.75, 0.74, and 0.80, respectively. CONCLUSION: Serum periostin levels were significantly higher in children with asthma. ROC AUC values for periostin were equivalent to conventional biomarkers, including FeNO levels and lung function testing, indicating the utility of serum periostin levels in diagnosing asthma in children.
BACKGROUND: There are some biomarkers for asthma diagnosis but they are often difficult in clinical use, particularly in pediatric cases. Periostin is an extracellular matrix protein, upregulated in response to IL-4 or IL-13. Serum periostin is expected to be used as a non-invasive biomarker for asthma diagnosis and management. METHODS: Twenty-eight children with asthma (BA) and 27 children without asthma (patients with pectus excavatum, etc. as control group) aged 6-16 years were included. Bronchial asthma was diagnosed according to International Study of Asthma and Allergies in Childhood (ISAAC) questionnaire. Fractional exhaled nitric oxide (FeNO), lung function, blood eosinophil counts, total immunoglobulin E (IgE) levels, and serum periostin levels were assessed. Results were compared between BA and controls. Asthma diagnostic accuracies were calculated using receiver operating characteristics (ROC) curve analyses. RESULTS: Serum periostin levels in the BA group were significantly higher than those in the control group [medians (with interquartile ranges), 134.0 (116.3-166.3) vs. 112.0 (97.0-132.0) ng/ml; p = 0.012]. The area under the ROC curve (AUC) for periostin, FeNO, and eosinophil counts were 0.70, 0.72, and 0.84, respectively. After the exclusion of controls with pectus excavatum, AUC for periostin, forced expiratory volume in 1 s (FEV1 ), and maximum mid-expiratory flow rate (MMF) were 0.75, 0.74, and 0.80, respectively. CONCLUSION: Serum periostin levels were significantly higher in children with asthma. ROC AUC values for periostin were equivalent to conventional biomarkers, including FeNO levels and lung function testing, indicating the utility of serum periostin levels in diagnosing asthma in children.
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