摘要
目的：探索大鼠骨髓间充质干细胞（Bone marrow mesenchymal stem cells，BMSCs）的分离、培养及鉴定方法。方法采用贴壁分离方法，分离纯化3～4周龄 SD 大鼠的骨髓间充质干细胞，观察细胞生长状况，分别用免疫荧光染色、流式细胞仪鉴定及4′，6-二脒基-2-苯基吲哚（DAPI）标记细胞核的方法鉴定 BMSCs 纯度及活性。结果原代 BMSCs 呈圆形、大小均一，透光性可，24 h 后开始贴壁，2 d 后开始长出伪足，7～8 d 细胞融合达90％，纯化后 BMSCs 呈梭形，24 h 细胞贴壁率可达99％，前4代细胞传代周期为7 d，之后传代周期逐渐缩短。第3代BMSCs 的表面标志物 CD29阳性表达率为98．9％，CD44阳性表达率为73．3％。DAPI 标记的 BMSCs 胞核可见明亮蓝色荧光，标记率达100％。结论贴壁分离法分离大鼠 BMSCs，可得到纯度较高、活力强的 BMSCs，第3代BMSCs 生物学性状稳定。
Abstract
Objective To explore the methods of separate,culture and identification of rat bone marrow mesenchymal stem cells.Methods By adherent separation method,bone marrow mesenchymal stem cells were isolated and purified from 3-4 weeks old SD rat,then cell growth was observed,respectively by im-munofluorescence staining,flow cytometry and DAPI nuclear staining method for identification of BMSCs purity and activity.Results Primary BMSCs was round,uniform in size and light in transmission.After 24h begin to adherent,2 d began to grow following pseudopodia,90% of the cells were fused on 7-8 d, and purified BMSCs werefusiform.24 h cell adherent rate was 99% and before the 4th generation cell cycle was 7 days.After subculture,cycle gradually shortened.The results of surface markers of the third gener-ation MSCs showed thatthe positive rate of CD29 was 98.9%,and the positive rate of CD44 was 73.3%. DAPI labeled BMSCs,the nucleus can see bright blue fluorescence,labeling rate of 100%.Conclusion Adherent separation of rat BMSCs have high purity and strong vitality of BMSCs,and the third generation of BMSCs shows stable biological character.
基金项目
新疆维吾尔自治区自然科学基金面上项目(2012211A072)
NETL
NSTL
维普
万方数据