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一种用于构建骨软骨移植物时骨髓基质细胞成骨和成软骨分化的最小通用骨软骨细胞分化培养基。

A minimal common osteochondrocytic differentiation medium for the osteogenic and chondrogenic differentiation of bone marrow stromal cells in the construction of osteochondral graft.

作者信息

Li Jian, Mareddy Shobha, Tan Dawn Meifang, Crawford Ross, Long Xing, Miao Xigeng, Xiao Yin

机构信息

Institute of Health and Biomedical Innovation, Queensland University of Technology, Brisbane, Australia.

出版信息

Tissue Eng Part A. 2009 Sep;15(9):2481-90. doi: 10.1089/ten.TEA.2008.0463.

Abstract

To regenerate the complex tissue such as bone-cartilage construct using tissue engineering approach, controllable differentiation of bone marrow stromal cells (BMSCs) into chondrogenic and osteogenic lineages is crucially important. This study proposes to test a minimum common osteochondrocytic differentiation medium (MCDM) formulated by including common soluble supplements (dexamethasone and ascorbic acid) used to induce chondrogenic and osteogenic differentiation. The MCDM coupled with supplemented growth factors was tested for its ability to differentiate BMSCs into osteogenic and chondrogenic lineages in both two-dimensional and three-dimensional culture systems. When transforming growth factor beta3 was added to MCDM, BMSCs differentiated to chondrocyte-like cells, evidenced by the expression of glycosaminoglycans and type II collagen, whereas osteogenic differentiation was induced by supplementing osteogenic protein-1, resulting in detectable expression of osteopontin and osteocalcin. These chondrogenic and osteogenic differentiation markers were significantly enhanced in the three-dimensional cultures compared to the two-dimensional monolayer cultures. The results achieved in this study lay a foundation for future development of osteochondral graft, which could be engineered from bilayered scaffold with spatially loaded growth factors to control BMSC differentiation.

摘要

利用组织工程方法再生诸如骨软骨构建体等复杂组织时,骨髓间充质干细胞(BMSCs)向软骨生成和成骨谱系的可控分化至关重要。本研究旨在测试一种最小通用骨软骨细胞分化培养基(MCDM),该培养基通过添加用于诱导软骨生成和成骨分化的常见可溶性补充剂(地塞米松和抗坏血酸)配制而成。在二维和三维培养系统中,测试了添加生长因子的MCDM将BMSCs分化为成骨和成软骨谱系的能力。当向MCDM中添加转化生长因子β3时,BMSCs分化为类软骨细胞,糖胺聚糖和II型胶原蛋白的表达证明了这一点,而通过补充成骨蛋白-1诱导成骨分化,导致骨桥蛋白和骨钙素的可检测表达。与二维单层培养相比,这些软骨生成和成骨分化标志物在三维培养中显著增强。本研究取得的结果为未来骨软骨移植物的开发奠定了基础,该移植物可以由具有空间加载生长因子的双层支架构建,以控制BMSCs的分化。

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