Analysis of growth factors in serum and induced sputum from patients with asthma

Zou,Hui; Fang,Qiu‑Hong; Ma,Ying‑Min; Wang,Xue‑Yan

doi:10.3892/etm.2014.1759

Analysis of growth factors in serum and induced sputum from patients with asthma

Authors:
- Hui Zou
- Qiu‑Hong Fang
- Ying‑Min Ma
- Xue‑Yan Wang
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Affiliations: Department of Allergy, Beijing Shijitan Hospital, Capital Medical University, Beijing 100038, P.R. China, Department of Pulmonary and Intensive Care Unit, Beijing Shijitan Hospital, Capital Medical University, Beijing 100038, P.R. China
Published online on: June 4, 2014 https://doi.org/10.3892/etm.2014.1759
Pages: 573-578

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Abstract

Epidermal growth factor (EGF), basic fibroblast growth factor (bFGF), the AA and BB isoforms of platelet‑derived growth factor (PDGF) and vascular endothelial growth factor (VEGF) are involved in the pathogenesis of airway inflammation in asthma. In the present study, the associations between asthmatic phenotypes and the expression levels of these mediators in induced sputum and serum were investigated. A total of 62 asthmatic patients were divided into eosinophilic or neutrophilic phenotypes by cytological classification of the induced sputum. In addition, patients were classified according to lung function (FEV1/FVC >70% or FEV1/FVC <70%) and asthma severity (mild, moderate or severe). The concentrations of EGF, bFGF, PDGF‑AA, PDGF‑BB and VEGF in the serum and induced sputum were measured using sandwich enzyme immunoassays. VEGF levels in the serum and induced sputum were higher in patients with an eosinophilic phenotype compared with those with a neutrophilic phenotype. In addition, VEGF expression was higher in patients with an FEV1/FVC value of <70% as compared with patients with an FEV1/FVC value of >70%. Furthermore, the levels of VEGF were higher in patients with severe asthma compared with the patients with mild and moderate asthma. There were no statistically significant differences observed with regard to EGF, bFGF, PDGF‑AA and PDGF‑BB levels among the various phenotypes. Therefore, the observations of the present study indicated that increased VEGF expression in the serum and induced sputum of patients may be associated with eosinophilic airway inflammation, severe airflow limitation and the severity of asthma.

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