利用尿白三烯E4水平鉴别被动吸烟儿童的哮喘急性发作风险
2011/10/13
摘要
背景:哮喘患儿二手烟(SHS)的暴露,使其哮喘急性发作的风险显著增加,但有关SHS暴露易感性的生物标志物尚未有报道。
目的:本试验旨在评价尿白三烯E4(uLTE4)水平在预测需要急诊就医(ED)或紧急治疗(UC)的哮喘严重恶化中的有效性。
方法:44名患中重度哮喘的学龄期儿童入选,这些患儿采用皮质激素吸入治疗,对其随访5个月,随访期间反复检测uLTE4,并检测ED和UC就诊。SHS暴露状态通过采用试验前问卷调查和试验中的尿可替宁检测来证实。
结果:20名SHS暴露的儿童中有9名(45%)出现哮喘严重的急性发作,需要ED或UC就诊,而24名无明显SHS暴露的患儿中仅3名(12.5%)需要ED或UC就诊(RR:3.6; 95% CI, 1.1-11.5; P = .02)。SHS 暴露的儿童中,uLTE4水平是哮喘急性发作风险的重要预测因素(曲线下面积:0.85; P =0.003)。其他预测指标,如夜间症状频率、支气管收缩剂使用前后的肺功能、呼出气一氧化氮水平,均与该组哮喘恶化无关。在预测SHS暴露儿童ED或UC就诊时,uLTE4≥106 pg/mg具有67% (6/9)的敏感性和100% (11/11)的特异性。
结论:即使采用皮质激素吸入治疗,儿童SHS暴露仍能增加严重哮喘恶化的风险。uLTE4水平能鉴别SHS暴露儿童的哮喘恶化高风险。
(陈欣 审校)
J Allergy Clin Immunol. 2011 Aug;128(2):323-7.
Urinary leukotriene E(4) levels identify children with tobacco smoke exposure at risk for asthma exacerbation.
Rabinovitch N, Reisdorph N, Silveira L, Gelfand EW.
Source
Department of Pediatrics, National Jewish Health, Denver, Colo.
Abstract
BACKGROUND: Children with asthma exposed to secondhand smoke (SHS) might be at higher risk for severe exacerbations, but biomarkers of susceptibility to SHS exposure have not been previously reported.
OBJECTIVES: We sought to assess the usefulness of urinary leukotriene E(4) (uLTE(4)) levels in the prediction of increased risk of severe asthma exacerbations requiring emergency department (ED) or urgent care (UC) visits.
METHODS: Forty-four schoolchildren with moderate-to-severe asthma receiving inhaled corticosteroids were followed for 5 months with repeated measurements of uLTE(4) and monitoring of ED and UC visits. SHS exposure status was determined by using prestudy questionnaires and repeated measurements of urinary cotinine during the study.
RESULTS: Nine (45%) of 20 children with SHS exposure experienced a severe exacerbation requiring an ED or UC visit compared with 3 (12.5%) of 24 children without significant SHS exposure (relative risk, 3.6; 95% CI, 1.1-11.5; P = .02). The uLTE(4) level was a significant predictor of exacerbation risk in children exposed to SHS (area under the curve, 0.85; P = .003). Other predictors, such as nighttime symptom frequency, prebronchodilator and postbronchodilator lung function, and exhaled nitric oxide levels, were not related to exacerbations in this group. uLTE(4) levels at or greater than 106 pg/mg achieved 67% (6/9) sensitivity and 100% (11/11) specificity for predicting children with SHS exposure who required an ED or UC visit.
CONCLUSIONS: Children exposed to SHS are at increased risk for severe asthma exacerbations, despite use of inhaled corticosteroids. uLTE(4) levels identify children exposed to SHS at high risk for asthma exacerbations
J Allergy Clin Immunol. 2011 Aug;128(2):323-7.
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强迫振荡技术在重度肥胖患者减肥手术前后气道反应性检测中的应用
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大部分夜间哮喘症状出现在哮喘急性发作期以外且与哮喘发病相关