甲苯职业接触者血清蛋白质谱差异的研究

Study on proteomic profiling changes of workers exposed to methylbenzene and healthy individuals

目的研究甲苯接触工人与健康人群蛋白质图谱差异。方法收集甲苯接触工人(6例)和健康人群(6例)的血清,采用蛋白质组学非标记Label free质谱分析技术进行蛋白鉴定和定量,对甲苯接触组与健康对照组样本差异表达的蛋白质进行分析,应用生物信息学工具分析筛选到的蛋白质功能及其参与生物过程。结果蛋白质组学结果显示甲苯接触工人组与健康对照组之间差异表达超过2倍以上有39个蛋白,其中24个在甲苯接触工人组血清中表达上调,15个蛋白质在甲苯接触工人组表达下调。筛选到的这些蛋白质主要涉及信号转导、丝氨酸内肽酶活力、炎性反应、蛋白修饰、应激反应、凝血反应等过程。结论差异表达的蛋白质为甲苯接触人群的健康评估和早期疾病诊断提供了潜在蛋白标志物,有助于对甲苯早期中毒的分子机制的理解。

ObjectiveThis study focused on the proteomicchanges between workers exposed to methylbenzene (WMB) and healthy individuals (HI) .MethodsThe serum of WMB and HI was collected and the unmarked label free mass spectrometry was utilized for protein identification and quantitative comparison. The differentlyexpressed proteins in WMB and the HI were screened, followed by the analysis of protein and biological functions by bioinformatics tools.ResultsThirty nine proteins were differently expressed between WMB and HI. Compared with HI, 24 proteins were up regulated and 15 proteins were down regulated over 2 fold change in WMB. Theseproteins were mainly involved in signal transduction, serine endopeptidase activity, inflammatory response, protein modification, stress reaction, coagulation reaction and so on.ConclusionThe differently expressed proteins provide a potential protein marker for the health assessment of WMB and early diagnosis of methylbenzene poisioning and expand our understanding of the molecular mechanism of methylbenzene intoxication.