小儿肺炎患者尿液的代谢组学初步研究

利用液相色谱-质谱联用法对小儿肺炎( Childhood pneumonia, CP)患者和健康儿童( Healthy control)的尿液进行分析,发现小儿肺炎患者尿液中的潜在标记物,为其发病机制及早期筛查提供科学依据。筛选10例小儿肺炎患者(age 47.72±2.35 months)及10例健康儿童(age 46.65±1.97 months)尿液样本,采用快速高分辨液相色谱四极杆-飞行时间质谱联用( RRLC-Q TOF/MS)技术对其尿液代谢物进行分析,通过主成分分析方法( PCA)对两组代谢物进行分类,并发现潜在生物标记物。 RRLC-Q TOF/MS检测表明,CP组和Healthy Control组尿液代谢物图谱能得到很好的区分,并鉴定了5种生物标记物,提示嘌呤代谢、氨基酸代谢可能在小儿肺炎发生发展中有重要作用。

A Metabonomics Study of Childhood Pneumonia by Rapid Resolution Liquid Chromatography Quadrupole Time-of-flight Mass Spectrometry

In this study, the rapid resolution liquid chromatography quadrupole time-of-flight mass spectrometry ( RRLC-QTOF/MS ) was used to profile the metabolites of urine samples from Childhood Pneumonia ( CP) patients and healthy controls and find the potential biomarkers which can support evidence to early diagnose and cure the disease. Choose 10 CP patients ( age 47. 72 ± 2. 35 months) and 10 healthy controls ( age 46 . 65 ± 1 . 97 months ) . The urine samples were analyzed by RRLC-QTOF/MS and then the resulting data matrices were analyzed by principal components analysis ( PCA ) to find the potential biomarkers. Urine samples of CP patients were successfully distinguished from those of healthy controls. A total of two significantly changed metabolites have been found and identified as potential biomarkers. It is suggested that the disorder of purine metabolism and amino acid metabolism may play an important role in the mechanism of CP.