家兔血清蛋白质组双向凝胶电泳技术的建立

Establishment of two-dimensional gelelectrophoresis technique for rabbit serum proteomics

背景:家兔血清是基础研究中常用的实验样品,双向凝胶电泳是蛋白质组学中最经典的蛋白分离技术,因此建立稳定的家兔血清蛋白质组双向凝胶电泳技术体系非常重要。目的:建立家兔血清蛋白分离的双向凝胶电泳技术体系。设计、时间及地点:单一样本观察,实验于2008-06/07在武警医学院天津市职业与环境危害生物标志物重点实验室完成。材料:健康家兔6只,由唐山市职业技术学院动物中心提供。方法:去除高丰度蛋白前后的健康家兔血清样品,分别加入水化上样液使样品中的蛋白充分裂解,还原烷基化后上样,被动水化14h。等电聚焦电泳后进行SDS-PAGE电泳。凝胶银染后用PDQuest7.4软件进行分析。主要观察指标:①高丰度蛋白去除效率。②2-DE图谱。结果:双向电泳图谱清晰,分辨率高,重复性好。未去除高丰度蛋白的血清2-DE图效果优于去除高丰度蛋白后的血清2-DE图。结论:成功建立家兔血清蛋白质双向凝胶电泳技术,将为进一步开展疾病的血清蛋白质组学研究奠定基础。

BACKGROUND： Rabbit serum samples are widely used in basic researches, and two-dimensional gelelectrophoresis （2-DE） is the most classic technique for protein separation. Therefore, it is of great significance to establish a stable technique system of 2-DE for rabbit serum. OBJECTIVE： To establish a 2-DE technique system for rabbit serum protein separation. DESIGN, TIME AND SETTING： A single sample observational experiment was performed at Tianjin Key Laboratory of Biomarkers for Occupational and Environmental Hazard of Chinese People＇s Armed Police Forces Medical College from June to July in 2008. MATERIALS： Six healthy rabbits were provided by the Animal Experimental Center of Tangshan Vocational Technical College METHODS： Health rabbit serum was dissolved in rehydration sample loading buffer before and after eliminating high abundance proteins to make proteins in it schizolysis adequately. After reductive alkylation, the samples were loaded into the rehydration tray to undergo passive rehydration for 14 hours. Isoelectric focusing （IEF） electrophoresis was followed by sodium dodecyl sulfate-polyacrylamide gel electrophoresis （SDS-PAGE）. After sliver staining, the gel was analyzed by PDQuest7.4. MAIN OUTCOME MEASURES： （1）Efficiency of eliminating high abundance proteins. （2）Two-dimensional electrophoregrams （2-D electrophoregrams） RESULTS： Distinct 2-D electrophoregrams were obtained with high resolution and good reproducibility. The removal of high abundance proteins in serum failed to result in better 2-D electrophoregrams. CONCLUSION： We have successfully established a 2-DE technique for rabbit serum proteome, which can lay the foundation for the further study of serum proteomics of diseases.