系统性红斑狼疮患者外周血单个核细胞蛋白质组学研究

目的 分析系统性红斑狼疮(SLE)患者外周血单个核细胞(PBMCs)蛋白质表达谱的变化.方法 分别抽取SLE患者及健康对照外周血,分离单个核细胞,抽提总蛋白,进行双向电泳、电泳胶银染显色,用ImageMaster 2D Platinum 5.0软件对获得的蛋白图谱进行分析,寻找差异表达的蛋白质.利用基质辅助激光解析电离飞行时间质谱鉴定差异蛋白点.结果 对照组凝胶蛋白点匹配率为(71±4)%,患者组匹配率为(72±4)%.对照组凝胶共检出蛋白点(791±17)个,患者组检出(781±17)个.有11个蛋白点在SLE患者组表达上调,9个表达下调,质谱分析共鉴定5个蛋白.以前的研究显示,我们鉴定的部分蛋白在SLE的发病机制中起潜在的作用.结论 SLE患者外周血单个核细胞蛋白质表达发生了明显改变,为我们从淋巴细胞蛋白质谱变化的整体角度上阐明SLE发生的分子机制及免疫调控通路奠定了基础.

A proteomic study of peripheral blood mononuclear cells in systemic lupus erythematosus

Objective To analyze the changes in the protein expression profile of peripheral blood mononuclear cells in systemic lupus erythematosus patients. Methods Peripheral blood was obtained from SLE patients and healthy controls, then mononuclear cells were isolated and the total protein was extracted by one-step method. Two-dimensional gel electrophoresis was performed and then stained with silver. Protein maps were analyzed and differentially expressed protein spots were detected using ImageMaster 2D Platinum 5.0 software. Results Match rates of (71±4)% and (72±4)% was obtained from gels from controls and pati-ents respectively. 791±17 spots were detected from control gels and 781±17 from patient gels. Eleven protein spots were up-regulated and 9 were down-regulated in SLE patients. Five proteins were identified by MS analysis, some of which had previously been shown to play a potential role in the pathogenesis of SLE. Conclusion There are significant changes in the protein expression of peripheral blood mononuclear cells in systemic lupus erythematosus patients. This study could be used as a preliminary work for better understanding of the pathogenesis and immune regulation pathways of SLE from an integrated lymphocyte protein profile perspective.