摘要
目的探讨骨形态发生蛋白(rhBMP-2)的聚乳酸聚乙醇酸共聚物(PLGA)体外缓释生物支架对人骨髓间充质干细胞(MSCs)细胞的影响。方法采用粒子沥滤-冷冻干燥复合工艺制备了附载rhBMP-2的PLGA生物支架,并检测了在PLGA的降解过程中rhBMP-2的释药规律;同时分离培养人骨髓间充质干细胞,体外培养后分别接种于附载和未附载rhBMP-2的PLGA支架上。扫描电镜观察不同时间段MSC在支架上的生长情况;MTT法测定细胞增殖情况。结果rhBMP-2能被包裹进PLGA支架中,而且可以在PLGA支架降解过程中持续释放出来并诱导骨发生。结论骨形态发生蛋白的PLGA复合载体是一种较为理想的新型生物支架。
Objective To assess the feasibility of using biodegradable poly(lactic-co-glycolic acid) (PLGA) scaffold with controlled release of rhBMP-2 and its effect on the osteogenic activity of MSCs in vitro. Methods The PLGA scaffolds with rhBMP-2 sustained release system were made by combination of porogen- leaching and freeze-drying. The drug release kinetics was measured by enzyme-linked immunosorbent assay (ELISA) in vitro. MSCs were isolated from the bone marrow of human and cultured for 3 passages. Then, MSCs were seeded onto PLGA scaffolds. PLGA scaffolds without rhBMP-2 were used as experimental controls . Scanning electron microscopy(SEM) was used to observe the morphology of MSCs. The cell proliferation was determined by MTT assay. Results The rhBMP-2 was encapsulated into PLGA scaffolds and it was found to be continuously released from the scaffolds. The scaffolds have evident enhancing effect on ectopia osteogenesis. Conclusion PLGA scaffold containing rhBMP-2 is a new promising tissue engineering scaffold.
出处
《国际生物医学工程杂志》
CAS
北大核心
2010年第3期147-151,共5页
International Journal of Biomedical Engineering
基金
东南大学国家自然科学基金预研项目(XJ0690256)
关键词
骨髓
干细胞
聚乳酸聚乙醇酸共聚物
组织工程
骨形态发生蛋白
Bone marrow
Stem cells
Poly(lactic-co-glycolic acid)
Tissue engineering
Bone morphogenetic proteins