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中文摘要：
海藻酸钙微胶珠具有良好的生物相容性、可降解、机械强度高、韧性好等优点,已被广泛应用于组织工程研究.骨粉中含有大量的羟基磷灰石及BMP等生长因子,具有良好的骨诱导活性.结合上述两种材料的优点,制备了一种复合海藻酸钙/骨粉微胶珠,并系统研究了人源脂肪干细胞（adipose-derived stemcells,ADSCs）在其中的最佳包埋密度.通过正交实验综合考虑海藻酸钠溶液浓度、氯化钙溶液浓度和骨粉密度对海藻酸钙/骨粉微胶珠机械强度及传质性能的影响,并采用液滴法制备了最优化的用于ADSCs体外增殖分化的微胶珠.结果表明,海藻酸钠溶液的浓度对微胶珠传质能力和机械强度的影响最大,CaCl2溶液浓度其次,骨粉密度的影响最小.当海藻酸钠溶液浓度、CaCl2溶液浓度和骨粉密度分别为2.5%,4.5%和5.0mg/mL时,微胶珠的性能最好.对细胞扩增倍数的比较和死活染色等检测表明,当ADSCs的初始包埋密度为5×10^6cells/mL时,更适于ADSCs的扩增与分化.
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