中文摘要：

利用锂钙硼玻璃在磷酸盐溶液中的原位转化反应制备表面多孔且中空的羟基磷灰石（HA）微球,将重组人骨形态发生蛋白2（rhBMP-2）装载到微球中,研究了微球中rhBMP-2的体外缓释行为,并采用体外细胞培养技术,将载有rhBMP-2的微球和大鼠骨髓间充质干细胞（MSCs）一起培养,测定细胞的碱性磷酸酶（ALP）活性,并与单纯rhBMP-2的作用进行比较.结果显示,微球中所装载的rhBMP-2具有明显的缓释效应,体外释放周期达到1000h以上,该微球缓释系统具有一定的生物活性,其作用效果优于单纯使用rhBMP-2.

英文摘要：

Hollow hydroxyapatite microspheres consisted of a hollow core and a porous shell were prepared by converting Li2O-CaO-B2O3 glass microspheres in dilute phosphate solution at 37℃.Human bone morphogenetic protein（rhBMP-2） was loaded in the resultant microspheres,and the in vitro release behavior of rhBMP-2 was studied.Furthermore,cell culture technique and ALP kit were used to investigate the effect of the released rhBMP-2 on cell activity.After incubation with rhBMP-2 loaded microspheres,the alkaline phosphatase（ALP） activity of the rat bone marrow mesenchymal stem cells（MSCs） was evaluated.It was found that rhBMP-2 could be released slowly from the hollow HA microspheres for an extended period time up to 1000h.The present delivery system es-tablished possessed higher biological activity as compared with pure rhBMP-2.