无葡聚糖包被超顺磁性氧化铁纳米颗粒影响骨髓间充质干细胞的增殖  

Effects of non-dextran coated superparamagnetic iron oxide nanoparticles on proliferation of bone marrow mesenchymal stem cells

作　　者：陈鹏[1] 张杰[1] 荣冬明 韩忠宇[2] 袁思捷 田京[1] 

机构地区：[1]南方医科大学珠江医院骨科中心,广东省广州市510282 [2]南方医科大学第二临床医学院,广东省广州市510515

出　　处：《中国组织工程研究》2014年第16期2526-2531,共6页Chinese Journal of Tissue Engineering Research

基　　金：广东省科技计划项目(2011B031800147)~~

摘　　要：背景:目前关于无葡聚糖包被超顺磁性氧化铁纳米颗粒对细胞增殖活性的影响及毒性效应的研究较少。目的:探究无葡聚糖包被超顺磁性氧化铁纳米颗粒对大鼠骨髓间充质干细胞的毒性、增殖等生物学活性的影响。方法:制备含0,25,50,75,100 mg/L无葡聚糖包被超顺磁性氧化铁纳米颗粒的培养液,采用5种质量浓度的培养液培养大鼠骨髓间充质干细胞,24 h后进行普鲁士蓝染色验证超顺磁性氧化铁纳米标记情况,CCK-8法检测细胞增殖,同时检测细胞上清液中乳酸脱氢酶活性及细胞内超氧化物歧化酶活性。结果与结论:普鲁士蓝染色证实,50 mg/L及以上质量浓度的无葡聚糖包被超顺磁性氧化铁纳米颗粒均可100%标记细胞,但25 mg/L组尚无法达到完全标记。随着质量浓度的增高,无葡聚糖包被超顺磁性氧化铁纳米颗粒对细胞的抑制率及毒性逐渐增大,25 mg/L无葡聚糖包被超顺磁性氧化铁纳米颗粒对细胞的影响最小,50 mg/L无葡聚糖包被超顺磁性氧化铁纳米颗粒虽然对细胞生长的影响较25 mg/L组为高,但二者在统计学上无明显差别(P>0.05)。结果表明,50 mg/L无葡聚糖包被超顺磁性氧化铁纳米颗粒对骨髓间充质干细胞标记率高,且细胞毒性及对细胞增殖活性的影响较小。BACKGROUND：Currently, the research about effect of non-dextran coated superparamagnetic iron oxide nanoparticles on cellproliferation and cytotoxicity is relatively much less. OBJECTIVE：To evaluate the effects of 0, 25, 50, 75, 100 mg/L non-dextran coated superparamagnetic iron oxide nanoparticles on the proliferation and cytotoxicity of rat bone marrow mesenchymal stem cels. METHODS：Culture media containing 0, 25, 50, 75, 100 mg/L non-dextran coated superparamagnetic iron oxide nanoparticles were prepared for culture of bone marrow mesenchymal stem cels. After 24 hours of culture, the cels were confirmed using Prussian blue staining, and cellcounting was detected using cellcounting kit-8. Meanwhile, lactate dehydrogenase activity in the supernatant and intracelular superoxide dismutase activity were detected. RESULTS AND CONCLUSION：Loading of non-dextran coated superparamagnetic iron oxide nanoparticles in BMSCs was confirmed by Prussian blue staining. The percentage of cels labeled with non-dextran coated superparamagnetic iron oxide nanoparticles was up to 100% when the cels were incubated with a non-dextran coated superparamagnetic iron oxide nanoparticle solution of 50 mg/L and above, but 25 mg/L was insufficient to label al of the cels. Furthermore, as the concentration of non-dextran coated superparamagnetic iron oxide nanoparticles decreased, the cellproliferation rate decreased gradualy. The 25 mg/L group had a minimum cellproliferation rate, but the 25 and 50 mg/L groups showed no statisticaly significant difference （P 〉 0.05）. Therefore, 50 mg/L is considered as the appropriate concentration of non-dextran coated superparamagnetic iron oxide nanoparticles, under which, the labeling efficiency is higher and the cytotoxicity is lower.

关 键 词：生物材料 纳米材料 无葡聚糖包被的 超顺磁性纳米颗粒 骨髓间充质干细胞 乳酸脱氢酶 超氧化物歧化酶 增殖活性 细胞毒性 普鲁士蓝染色 标记率 

分 类 号：R318[医药卫生—生物医学工程]