用免疫磁性微球从骨髓中分离癌细胞

用物理吸附结合化学键共价结合的方法,将抗人膀胱癌单克隆抗体连接到预先制备的聚苯乙烯磁性微球表面,构建了能特异地与靶细胞结合并赋予其以磁响应性的免疫磁性微球(immunomagnetic microspheres,IMMS)。间接免疫荧光检测和IMMS与细胞的结合实验证明,所构建的IMMS可有效地和靶细胞结合。研究了聚苯乙烯磁性微球和抗体反应的质量比、IMMS与靶细胞比例对IMMS与细胞结合效果的影响。用IMMS从动物骨髓中分离癌细胞的初步实验表明,IMMS可有效清除癌细胞,而骨髓细胞仅有很少量的损失。

SEPARATION OF HUMAN BLADDER CANCER CELLS FROM BONE MARROW WITH A KIND OF IMMUNOMAGNETIC MICROSHPERES

By binding a monoclonal antibody BDI-1 to polystyrene magnetic micospheres using physical and chemical methods together, a kind of immunomagnetic microspheres (IMMS), which can specifically bind target cells and give it magnetic response, was sucessfully constituted. The results of indirect immunofluorescence and cell binding suggest that IMMS can effectively bind target cells while do not have non-specific binding activity. The influence of antibody added and the ratio between IMMS and cells were also studied. After purging cancer cells from bone marrow of mice with IMMS, the cancer cells were effectively removed while most of the bone marrow cells were recovered.