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J Biomater Appl:3D打印介孔生物活性玻璃/海藻酸钠/明胶缓释支架可有效进行骨修复

2018-11-17 MedSci MedSci原创

药物输送和释放是骨组织工程所面临的一大挑战。在这项研究中,我们通过3D打印技术制备了由介孔生物活性玻璃、海藻酸钠和明胶复合的新型缓释水凝胶支架。柚皮苷和降钙素基因相关肽用作药物,通过直接打印或表面吸收制备载药支架。研究支架的物理化学性质和两种载药模型的药物释放曲线。检测支架的生物相容性,以及药物释放对人成骨细胞样MG-63细胞的增殖和成骨分化的影响。结果表明,支架具有较高的孔隙率(约80%),具有

药物输送和释放是骨组织工程所面临的一大挑战。在这项研究中,我们通过3D打印技术制备了由介孔生物活性玻璃、海藻酸钠和明胶复合的新型缓释水凝胶支架。柚皮苷和降钙素基因相关肽用作药物,通过直接打印或表面吸收制备载药支架。

研究支架的物理化学性质和两种载药模型的药物释放曲线。检测支架的生物相容性,以及药物释放对人成骨细胞样MG-63细胞的增殖和成骨分化的影响。

结果表明,支架具有较高的孔隙率(约80%),具有相互连接的立方孔结构,粗糙的表面形态,生物活性和强大的生物相容性。此外,共同打印到支架中的柚皮苷或降钙素基因相关肽在没有初始突释的情况下显示出长达21天的稳定持续释放行为,而吸附在支架表面上的柚皮苷和降钙素基因相关肽均为两天内完全释放。与含有释放药物的提取物一起培养的MG-63细胞与无药物提取物相比,可更有效地促进细胞增殖和成骨相关基因的表达。

因此,这些结果表明,本研究所制备的中孔生物活性玻璃/海藻酸钠/明胶缓释支架为骨组织工程提供了潜在的应用。

原始出处:

Wu J, Miao G, et al., 3D printing mesoporous bioactive glass/sodium alginate/gelatin sustained release scaffolds for bone repair. J Biomater Appl. 2018 Nov 14:885328218810269. doi: 10.1177/0885328218810269.

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    2019-05-16 sunylz
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    2019-04-06 axin020
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