健康新生儿尿嗜酸性粒细胞蛋白X增加早于6岁内特应症的出现
2011/08/11
摘要
原理:对特应性疾病的靶向预防措施需要能预测特应性疾病发展的生物标志物,而且有必要研究疾病的病理学发生是否早于症状发作。
目的:研究6岁内,健康新生儿尿液嗜酸性粒细胞蛋白X、白三烯C4/D4/E4和11β-前列腺素F2α(前列腺素D2代谢产物)增加,是否早于特应性疾病的发生。
方法:在哥本哈根儿童哮喘前瞻性研究(COPSAC)中,对1个月大婴儿检测尿嗜酸性粒细胞蛋白X(n=369)、白三烯C4/D4/E4(n=367)和11β-前列腺素F2α(n=366)。收集6岁以内相关临床信息,包括过敏性致敏、过敏性鼻炎、鼻嗜酸性粒细胞增多、血嗜酸性粒细胞增多、湿疹、肺部症状(明显咳嗽或喘息或呼吸困难)和哮喘。采用一般估计方程、logistic回归和Cox回归分析尿液生物标志物与特应性疾病的发生之间的关系。
主要结果:无症状的1个月大新生儿中,尿液嗜酸性粒细胞蛋白X与过敏性致敏显著相关(OR:1.49; 95% CI, 1.08-1.89),与鼻嗜酸性粒细胞增多显著相关(OR:3.2; 95% CI, 1.2-8.8),与湿疹显著相关(HR:1.4; 95% CI, 1.0-2.0),但与过敏性鼻炎、哮喘和血嗜酸性粒细胞增多无关。白三烯C4/D4/E4和11β-前列腺素F2α均与任何特应性表现型无关。
结论:无症状新生儿尿液嗜酸性粒细胞蛋白X可以作为一个生物标志物,与6岁内发生的过敏反应、鼻嗜酸性粒细胞增多和湿疹相关。这些结果表明,生命早期嗜酸性粒细胞活化早于特应性相关症状的出现。
(林江涛 审校)
Am J Respir Crit Care Med. 2011 Jun 16. [Epub ahead of print]
Elevated Eosinophil Protein X in Urine from Healthy Neonates Precedes Development of Atopy in the First 6 Years of Life.
Chawes BL, Bønnelykke K, Bisgaard H.
Source
Copenhagen Prospective Studies on Asthma in Childhood; Health Sciences, University of Copenhagen & Copenhagen University Hospital; Gentofte, Copenhagen, Denmark.
Abstract
Rationale Biomarkers predicting development of atopic disease are needed for targeted preventive measures and to study if disease pathology may be active prior to onset of symptoms. Objective To investigate whether eosinophil protein-X, leukotriene-C4/D4/E4 and 11β-prostaglandin-F2α (prostaglandin D2 metabolite) assessed in urine from healthy at-risk neonates precede development of atopic disease during the first 6 years of life. Methods We measured eosinophil protein-X (N=369), leukotriene-C4/D4/E4 (N=367), and 11β-prostaglandin-F2α (N=366) in urine from 1-month-old children participating in the Copenhagen Prospective Studies on Asthma in Childhood (COPSAC) birth cohort. Clinical data on development of allergic sensitization, allergic rhinitis, nasal eosinophilia, blood eosinophilia, eczema, troublesome lung symptoms (significant cough or wheeze or dyspnoea) and asthma were collected prospectively untill age 6 years. Associations between urinary biomarkers and development of atopic traits were investigated using general estimating equations, logistic regression and Cox regression. Measurements and Main Results Eosinophil protein-X in the urine of the asymptomatic 1-month-old neonates was significantly associated with development of allergic sensitization (Odds ratio, 1.49; 95% CI, 1.08-1.89), nasal eosinophilia (Odds ratio, 3.2; 95% CI, 1.2-8.8), and eczema (Hazard ratio, 1.4; 95% CI, 1.0-2.0), but not with allergic rhinitis, asthma or blood eosinophilia. Neither leukotriene-C4/D4/E4 nor 11β-prostaglandin-F2α was associated with any of the atopic phenotypes. Conclusion Eosinophil protein-X in urine from asymptomatic neonates is a biomarker significantly associated with later development of allergic sensitization, nasal eosinophilia and eczema during the first 6 years of life. These findings suggest activation of eosinophil granulocytes early in life prior to development of atopy-related symptoms.
Am J Respir Crit Care Med. 2011 Jun 16. [Epub ahead of print]
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