摘要
背景:支气管扩张剂反应性(BDR)和嗜酸性粒细胞性炎症是哮喘的特征性表现。
目的:本试验在哮喘患儿中研究乙酰甲胆碱或5’腺苷单磷酸(AMP)激发后的BDR与嗜酸性粒细胞标记物的关系。
方法:对69名轻度间歇性至中度持续性哮喘患儿进行乙酰甲胆碱和AMP激发试验。通过第一秒用力呼气体积变化计算BDR,表示为各自激发即刻及沙丁胺醇吸入后的变化百分数。同时检测每名患者的血清总IgE水平、血液嗜酸性粒细胞计数和血清嗜酸性粒细胞阳离子蛋白(ECP)水平。
结果:仅在AMP激发(R2 = 0.345, p = 0.001),而非乙酰甲胆碱激发后(R2 = 0.007, p = 0.495),血清总IgE水平与BDR成正相关。AMP激发后,外周血嗜酸性粒细胞计数与BDR的相关性(R2 = 0.212, P=0.001),强于乙酰甲胆碱激发后的相关性(R2 = 0.002, P=0.724)。乙酰甲胆碱激发后的BDR(R2 = 0.063, P=0.038)和AMP激发后的BDR(R2 = 0.192, P=0.001)与血清ECP水平显著相关。
结论:与乙酰甲胆碱激发后相比,AMP激发后的BDR与嗜酸性粒细胞性炎症的关系更紧密。
(苏楠 审校)
J Asthma. 2012 Jul 3. [Epub ahead of print]
Bronchodilator Responses after Methacholine and Adenosine 5’-Monophosphate (AMP) Challenges in Children with Asthma: Their Relationships with Eosinophil Markers.
Yoo Y, Seo SC, Kim YI, Chung BH, Song DJ, Choung JT.
Source
Department of Pediatrics, College of Medicine, Korea University , Seoul , Korea.
Abstract
BACKGROUND:Bronchodilator responsiveness (BDR) and eosinophilic inflammation are characteristic features of asthma.
OBJECTIVE:The aim of this study was to compare the relationships of BDR after methacholine challenge or adenosine 5’-monophosphate (AMP) challenge to blood eosinophil markers in children with asthma.
METHODS:Methacholine and AMP challenges were performed on 69 children with mild intermittent to moderate persistent asthma. BDR was calculated as the change in forced expiratory volume in 1 second, expressed as percentage change of the value immediately after the each challenge and the value after inhalation of salbutamol. Serum total IgE levels, blood eosinophil counts, and serum eosinophil cationic protein (ECP) levels were determined for each subject.
RESULTS:A positive relationship between serum total IgE levels and BDR was found only after the AMP challenge (R(2) = 0.345, p = .001) rather than after the methacholine challenge (R(2) = 0.007, p = .495). Peripheral blood eosinophil counts correlated more significantly with BDR after AMP challenge (R(2) = 0.212, p = .001) than BDR after methacholine challenge (R(2) = 0.002, p = .724). Both BDR after methacholine challenge (R(2) = 0.063, p = .038) and BDR after AMP challenge (R(2) = 0.192, p = .001) were significantly correlated with serum ECP levels.
CONCLUSION:BDR after AMP challenge may be more closely related to eosinophilic inflammation, compared with that after methacholine challenge.
J Asthma. 2012 Jul 3. [Epub ahead of print]
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