[Metabonomics of Syndrome Markers in Infantile Bronchial Asthma Episode].

Objective To analyze urinary metabolites of bronchial asthma children patients with phlegm-heat obstructing Fei syndrome (PHOFS) and non-PHOFS using gas chromatography-mass spec- trometry/mass spectrometer ( GC-MS/MS) , thus performing research on syndrome markers. Methods Totally 44 bronchial asthma children patients with PHOFS and non-PHOFS in onset of asthma were recrui- ted. Another 29 healthy children were also recruited. Their urine samples were analyzed by GC-MS/MS. The profiles were analyzed using orthogonal partial least squares-discriminant analysis (OPLS-DA) , vari- able importance in the projection (VIP) , and non-parametric test to determine intergroup differential metabolites. Abnormal metabolic pathways were determined by Metaboanalyst. Results Compared with the health control group, contents of fourteen substances like inositol, uric acid, stearic acid, and so on de- creased, and mino-malonic acid content increased in asthma episode children (P <0. 05). The process was mainly involved in 5 metabolic pathways such as lysine degradation and biosynthesis, pyruvate me- tabolism, and so on. Compared with the non-PHOFS group in bronchial asthma episode, contents of nine substances like oxalic acid, L-threonine, pyrimidine, and so on decreased in the PHOFS group (P < 0. 05). The process was mainly involved in 5 metabolic pathways such as pentose phosphate pathway, inositol phosphate metabolism, and so on. Conclusions Urinary metabolites are different in infantile bronchial asthma episode and healthy children. Metabolic biomarkers and pathways exist in different syn- dromes in bronchial asthma episode.