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Determination of Osteopontin at Trace Levels by Non-Gel Sieving Capillary Electrophoresis
Author(s): 
Pages: 520-523
Year: Issue:  5
Journal: CHINESE JOURNAL OF CHROMATOGRAPHY

Keyword:  毛细管电泳聚乙二醇20000无胶筛分骨桥蛋白血管平滑肌细胞;
Abstract: 采用非涂层毛细管,以150 mmol/L硼酸盐缓冲液为电泳缓冲液,30 g/L聚乙二醇(PEG)20000为筛分介质,经对分离条件进行优化,成功地建立了用无胶筛分毛细管电泳检测微量蛋白质的方法.用所建立的方法测定骨桥蛋白,其批内、批间迁移时间的相对标准偏差均小于5%,回收率大于95%,被检测样品中骨桥蛋白的含量与其峰面积呈良好的线性关系(相关系数为0.996),最低检测限为0.079 g/L.考察了无血清饥饿培养对血管平滑肌细胞分泌骨桥蛋白的影响,结果表明无血清饥饿培养24 h骨桥蛋白的合成与分泌达到高峰,此后随时间延长含量随之降低,此结果与采用Western blot方法检测的结果一致.该方法具有进样量小(nL级)、检测速度快、可自动化等优点,是一种简便、快捷的检测微量蛋白质的好方法.
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