Persistent airway inflammation and bronchial hyperresponsiveness in patients with totally controlled asthma

被引:19
|
作者
Hanxiang, N. [1 ]
Jiong, Y. [1 ]
Yanwei, C. [1 ]
Dunshuang, W. [2 ]
Xuhong, D. [1 ]
Xiaojun, W. [1 ]
Changsheng, L. [1 ]
机构
[1] Wuhan Univ, Renmin Hosp, Dept Resp Med, Wuhan 130060, Peoples R China
[2] Hubei Zhongshan Hosp, Dept Resp Med, Wuhan, Peoples R China
关键词
D O I
10.1111/j.1742-1241.2007.01373.x
中图分类号
R5 [内科学];
学科分类号
1002 ; 100201 ;
摘要
Objective: A proportion of asthmatic patients can achieve total control according to the Global Initiative for Asthma/National Institute of Health guidelines. The aim of this study was to investigate whether total control of asthma is accompanied by the remission of airway inflammation and bronchial hyperresponsiveness. Methods: We assessed the number of eosinophil and the levels of eosinophil cationic protein (ECP) and interleukin (IL)-5 in induced sputum and bronchial responsiveness to methacholine in 76 patients with totally controlled asthma in comparison with 30 current untreated asthmatics and 20 healthy subjects. Results: We found significantly higher number of eosinophil and higher levels of ECP and IL-5 in the total control group than those in healthy subjects (6.9% +/- 3.6% and 1.3% +/- 1.1%, 129.0 +/- 53.8 mu g/l and 48.9 +/- 20.4 mu g/l, 22.1 +/- 15.2 mu g/l and 10.6 +/- 5.2 mu g/l, respectively; p < 0.001), but lower than those in current asthma group (16.2% +/- 8.6%, 362.2 +/- 151.6 mu g/l, 50.6 +/- 25.8 mu g/l, respectively; p < 0.001). Sixty-five (85.5%) patients with totally controlled asthma showed positive methacholine challenge test. In the total control group, number of eosinophil and the levels of ECP and IL-5 in induced sputum of patients with negative methacholine challenge test were significantly lower than those in subjects with positive methacholine challenge test (p < 0.001), whereas sputum number of eosinophil and the levels of ECP and IL-5 in patients with negative methacholine challenge test and those of healthy subjects were similar (p > 0.05). Conclusion: The results of this study suggest that airway inflammation and bronchial hyperresponsiveness still persisted during total control of asthma.
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收藏
页码:599 / 605
页数:7
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