室温湿法合成载不同浓度黄芪多糖(APS)的羟基磷灰石(HA/APS),通过X射线衍射(XRD)表征APS对HA晶体结构、结晶度及晶粒尺寸的影响;用透射电子显微镜(TEM)表征HA和HA/APS的晶体形貌,用激光粒度仪和比表面积仪分别检测HA的粒度及比表面积;体外培养MC3T3-E1成骨细胞,进行Alamar Blue、噻唑蓝(MTT)及碱性磷酸酶(ALP)检测,光镜观察细胞形貌,研究APS对成骨细胞作用的有效浓度范围及HA/APS对成骨细胞活性及分化的影响.结果表明:所载APS对HA晶体结构、结晶度和晶粒尺寸没有明显影响,晶体形貌没有变化,HA平均粒径为1.17μm,比表面积为132.194 m2/g;APS对成骨细胞的作用呈剂量和时间依赖关系,80～200 μg/mL促进细胞活性及ALP表达,HA/APS增强细胞活性,细胞形貌完整.因此,0.5 g HA载入100～250μg APS时明显促进成骨细胞活性,HA/APS具有作为临床骨缺损填充材料的潜能.
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