比较可疑哮喘患者因乙酰甲胆碱和腺苷的气道高反应性和气道炎症标志物
2011/07/06
摘要
背景:支气管高反应性常常采用直接(乙酰甲胆碱)和间接(腺苷)支气管激发试验来检测。较少研究对这两种物质进行比较,而且结果也存在着不一致。
目的:本研究在哮喘相关症状人群中比较两者检测的结果,研究两者与支气管炎症标志物的关系。
方法:79名年龄为14~81岁的研究对象入选。采用潮气量法进行支气管激发试验。计算乙酰甲胆碱的PC20和腺苷的PC15和PC20。此外,检测诱导痰液和呼出气一氧化氮含量。
结果:69%的患者存在特应性。32名患者乙酰甲胆碱PC20和腺苷PC15阳性(40.5%),两者的敏感性为73%。一致性的百分比为45.45%,κ指数仅为0.369。腺苷PC20具有较低的敏感性和一致性。乙酰甲胆碱PC20和腺苷PC15间无显著相关。腺苷激发试验阳性患者,其呼出气一氧化氮分数与痰液嗜酸性细胞计数均较高。采用腺苷PC15或PC20不改变与炎症标志物的关系。
结论:两种技术的一致性较低。乙酰甲胆碱不是一个预测腺苷诱导气道高反应的可靠指标,因此该研究结果提示两个试验在临床上可同时应用,因为两者具有互补性,而不具备可替换性。此外,对两种支气管收缩剂的反应并不表明存在气道异常。间接刺激可能更好地反映气道炎症。
(刘国梁 审校)
J Asthma. 2011 May;48(4):335-40.
Comparison of bronchial hyperresponsiveness to methacholine and adenosine and airway inflammation markers in patients with suspected asthma.
Manso L, Madero MF, Ruiz-García M, Fernández-Nieto M, Sastre J.
Source
Allergy Department, Fundación Jiménez Díaz and CIBER de Enfermedades Respiratorias (CIBERES), Madrid, Spain.
Abstract
BACKGROUND: Bronchial hyperresponsiveness is usually measured by bronchial challenge test with direct (e.g., methacholine) and indirect (e.g., adenosine) agonists. There are few studies comparing both types of agents and they have had conflicting concordance.
OBJECTIVE: We sought to compare the results of both tests in a population with symptoms suggestive of asthma so as to determine their relationship with bronchial inflammatory markers.
METHODS: Seventy-nine patients whose age ranged from 14 to 81 years were recruited for this study. Challenge tests were performed using the tidal volume method. PC(20) methacholine and PC(15) and PC(20) adenosine were calculated. Induced sputum and fraction of exhaled nitric oxide measurements were also performed.
RESULTS: Atopy was found in 69% of the patients. Methacholine PC(20) and adenosine PC(15) were positive in 32 patients (40.5%), both having a sensitivity of 73%. Percentage of agreement was 45.45% and κ index was only 0.369. Adenosine PC(20) elicited lower sensitivity and agreement. No correlation between methacholine PC(20) and adenosine PC(15) was observed. Higher fraction of exhaled nitric oxide values and sputum eosinophil counts were seen in patients with positive adenosine challenge results. The use of adenosine PC(15) or PC(20) did not alter the association with inflammatory markers.
CONCLUSIONS: The concordance between both techniques was low. Methacholine is not a reliable predictor of hyperresponsiveness to adenosine, leading us to conclude that the two tests are complementary but not interchangeable in clinical practice. Additionally, responsiveness to the two bronchoconstrictor stimuli does not indicate presence of the same airway abnormality. Indirect stimuli provide a better reflection of bronchial inflammation.
J Asthma. 2011 May;48(4):335-40.
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健康相关生活质量评价对可疑重度哮喘患儿的临床益处
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哮喘患儿乙酰甲胆碱与单磷酸腺苷 (AMP)反应性与支气管扩张剂后FEV(1)/FVC比值的关系