Objective: To investigate the effects of titanium dioxide nanoparticles (TiO(2) NPs) on urine metabolites in occupationally exposure people based on metabolomics technology, and to explore the mechanism of early health effects of TiO(2) NPs on occupational exposure. Methods: In October 2019, the TiO(2) NPs occupational exposure population was selected as the research object, of which 64 people were in the exposure group who had been engaged in TiO(2) NPs exposure positions for more than 1 year; the control group was 62 people, who were logistics administrative staff of the same company. The urine of the research subjects before class was collected, using the ultra-high performance liquid chromatography time-of-flight mass spectrometer to collect the metabolism data of the urine, Progenesis QI software for data preprocessing and metabolite identification, SIMCA-P software for the principal component analysis of the data and potential biomarkers screening, MetaboAnalyst 4.0 software for metabolic pathway enrichment analysis. Results: The urine metabolism profile of workers in the exposure group was different from the control group, and 44 potential biomarkers were screened and identified. These potential biomarkers were significantly enriched in three pathways (P<0.05) , namely D-arginine and D-ornithine metabolism pathway, nitrogen metabolism pathway and D-glutamine and D-glutamate metabolism pathways. Conclusion: The occupational exposure of TiO(2) NPs can affect the concentration of metabolites in people urine and metabolic pathways, which provides a direction for the study of occupational hazard mechanisms of TiO(2) NPs and the monitoring of health risks.
目的： 基于代谢组学技术探讨纳米二氧化钛颗粒（TiO(2) NPs）对职业接触人群尿液中代谢产物的影响，探讨TiO(2) NPs职业接触致机体早期健康效应的机制。 方法： 于2019年10月，选取TiO(2) NPs职业接触人群为研究对象，其中接触组64人，从事TiO(2) NPs接触岗位1年以上；对照组62人，为同企业后勤行政人员。收集研究对象班前尿液，利用超高效液相色谱飞行时间质谱联用仪采集尿液的代谢数据，Progenesis QI软件进行数据的预处理和代谢物的鉴定，SIMCA-P软件对数据进行主成分分析并筛选潜在生物标志物，MetaboAnalyst 4.0软件进行代谢通路富集分析。 结果： 接触组工人的尿液代谢轮廓不同于对照组，筛选并鉴定出44个潜在生物标志物，且在3条通路明显富集（P<0.05），分别为D-精氨酸和D-鸟氨酸代谢通路、氮代谢通路以及D-谷氨酰胺和D-谷氨酸代谢通路。 结论： TiO(2) NPs职业接触会对人群尿液中代谢物的浓度和代谢通路产生影响，为TiO(2) NPs职业危害机制的研究和健康风险的监测提供了方向。.
Keywords: Biomarkers; Metabolomics; Occupational exposure; Titanium dioxide nanoparticles; Ultra-high performance liquid chromatography time-of-flight mass spectrometry; Urine.