负载柚皮苷壳聚糖/β-磷酸三钙支架的表征及生物学性能

被引:1
作者
袁茜
张昊
庞杰
机构
[1] 十堰市人民医院(湖北医药学院附属人民医院)口腔科
关键词
柚皮苷; 壳聚糖; β-磷酸三钙; 支架; 骨缺损修复; 骨组织工程; 工程化骨材料;
D O I
暂无
中图分类号
R318.08 [生物材料学];
学科分类号
100103 [病原生物学];
摘要
背景:柚皮苷具有促进骨髓间充质干细胞增殖及成骨分化的能力,可用于治疗骨质疏松及促进骨折愈合,然而其生物利用率低,临床应用受限。目的:制备负载柚皮苷的壳聚糖/β-磷酸三钙支架,表征其生物学性能。方法:采用冷冻干燥和化学交联法制备壳聚糖/β-磷酸三钙支架,将壳聚糖/β-磷酸三钙支架浸泡于含柚皮苷的无水乙醇溶液中3 h,真空冷冻干燥后得到壳聚糖/β-磷酸三钙/柚皮苷支架,表征支架的孔径、孔隙率、溶胀率、降解率、机械性能及柚皮苷的体外释放能力。将大鼠骨髓间充质干细胞分别接种于壳聚糖/β-磷酸三钙支架与壳聚糖/β-磷酸三钙/柚皮苷支架表面,检测细胞增殖、黏附、活性及成骨诱导分化后的碱性磷酸酶活性。结果与结论:(1)扫描电镜下可见壳聚糖/β-磷酸三钙/柚皮苷支架具有多孔网状结构,平均孔径为(106.82±25.22)μm,孔隙率为(76.26±4.81)%,24 h溶胀率为(796.17±31.76)%,4周时体外降解率为7.71%,体外可释放柚皮苷长达9 d,壳聚糖/β-磷酸三钙/柚皮苷支架的平均孔径、孔隙率、24 h溶胀率、4周时体外降解率、压缩强度、压缩模量与壳聚糖/β-磷酸三钙支架比较差异均无显著性意义(P> 0.05);(2)大鼠骨髓间充质干细胞在两种支架表面黏附良好,并具有良好的活性,相较于壳聚糖/β-磷酸三钙支架,壳聚糖/β-磷酸三钙/柚皮苷支架可促进大鼠骨髓间充质干细胞的增殖(P <0.05),提高成骨诱导分化后的骨髓间充质干细胞碱性磷酸酶活性(P <0.05);(3)结果表明,壳聚糖/β-磷酸三钙/柚皮苷支架具有良好的物理性能,可促进骨髓间充质干细胞的增殖及成骨分化。
引用
收藏
页码:424 / 432
页数:9
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