【摘要】 目的:研究氧化低密度脂蛋白诱导的U937泡沫细胞中蛋白质组的差异表达。方法:泡沫细胞模型由人类单核细胞系白血病U937细胞经氧化低密度脂蛋白诱导而成,将对照U937细胞与U937泡沫细胞的蛋白提取物分别进行双向凝胶电泳(2-DE)分离,凝胶经银染后,于PDquest 2-DE图像分析软件中进行图像处理,利用ExPASy蛋白质组学网站中U937细胞的蛋白表达谱信息,对所得的U937泡沫细胞2-DE图谱作进一步鉴定。结果:通过对2-DE蛋白图谱的分析,共150点与参考胶相匹配(匹配率:75％),与U937细胞图谱相比,泡沫细胞中有37个蛋白点表达量有显著性变化(P<0.05),与对照U937细胞相比,在U937泡沫细胞中28个蛋白点表达量上调,9个点表达量下调,其中,8个U937细胞中表达的蛋白点,在U937泡沫细胞中未检测到;而11个在泡沫细胞中表达的蛋白点,未在对照U937细胞中表达。结论:本研究首次建立经氧化低密度脂蛋白诱导的U937泡沫细胞的蛋白差异表达谱,从而提供了对动脉粥样硬化病理过程中巨噬源性泡沫细胞功能性分析研究的新思路。更多还原

【Abstract】 AIM: To study the overall protein expression changes induced by oxidized low-density lipoprotein (ox-LDL) in the U937 foam cells. METHODS: Foam cell model was established by incubating the human monoblastic leukemia (U937) cells with ox-LDL. Each protein samples in U937 control cells and U937 foam cells were separated by twodimensional gel electrophoresis (2-DE). After the gels were stained by silver staining method, the images were analyzed by PDquest 2D-image-analysis software (Bio-Rad). Some of the spots were available via the Internet with links to the U937 proteomic map provided from the ExPASy Proteomics server. RESULTS: Using 2-DE, the overall protein map was obtained, in which 150 spots were matched with the control gel (match ratio: 75%). Compared with U937 cells, 37 spots significantly changed in the foam cells (P<0.05), among which the expression levels in 28 spots increased and those in 9 spots decreased. Especially, 8 spots in U937 cells were absent in the foam cells, while 11 spots in the foam clls were absent in the control cells. CONCLUSION: The changed protein profiles induced by ox-LDL in U937 foam cells were established to support the functional studies on the macrophage-derived foam cells in atherosclerotic pathological states.更多还原