药用水基磁流体的一步法制备及其细胞相容性研究

目的制备药用水基磁流体并评价其细胞相容性。方法利用微乳液制备技术,以一步表面活性剂处理法制备药用水基磁流体,并使用透射电镜和光子相关光谱仪研究其形态和粒径分布;分别采用四甲基偶氮唑盐比色试验、乳酸脱氢酶释放试验测定不同浓度药用水基磁流体对正常人肝细胞株(L-02)的体外细胞相容性;运用红外光谱法、热重法、差示热重法、差示扫描量热法对所制备的单层与双层正癸酸包覆的磁流体固态样品进行表征。结果药用水基磁流体粒径在10nm~20nm之间;其放置1y未见发生相分离及明显的数均粒径变化;其对L-02细胞不具有毒性,细胞相容性好。结论药用水基磁流体可用于磁性靶向给药系统。

Preparation of Medicinal Water-based Magnetic Fluid by One-step Method and Study on Its Cyto-compatibility

OBJECTIVE:To prepare medicinal water-based magnetic fluid and to study its cyto-compatibility.METHODS:Medicinal water-based magnetic fluids were prepared with microemulsion preparative technique by an one-step surface acting agent management method,the appearances and size distributions of which were detected by transmission elec-tron microscope and photon-related spectrograph.The influences of different concentrations of magnetic fluids on the in vitro cyto-compatibility of normal human liver cell strain(L-02)were detected by methyl thiazolyl tetrazolium(MTT)colorimetric assay and lactate dehydrogenase(LDH)delivery test,respectively.The characterization of the prepared solid magnetic fluid samples coated with monolayer and bilayer capric acid were conducted by infrared spectrometry,thermogravimetry,differential thermogravimetry and differential scanning calorimetry.RESULTS:The results showed that the grain size of the medicinal water-based magnetic fluids ranged from10nm to20nm.Phase separation or marked change in mean particle sizes were failed to be noted after storage for1year.The MTT and LDH tests results showed that medicinal water-based magnetic fluids were of no cytotoxicity to L-02but have good cyto-compatibility.CONCLUSION:Medicinal water-based magnetic fluids can be used in magnetic targeting drugs delivery system.