摘要
人们对间充质干细胞(mesenchymal stem cell,MSC)的生物学特性,已经进行了广泛的体外研究。然而,由于MSC缺乏特异性的表面标志,这类细胞在体内存在的具体部位仍不清楚。既往的研究表明,人和小鼠骨实质中存在MSC。为观察此现象是否见于其他动物,收集Wistar大鼠、Beagle犬、C57小鼠及新西兰白兔股骨,用I型胶原酶将其骨片消化;去除消化细胞后,将消化后的骨碎片接种于人骨髓MSC培养体系中。结果表明,数天后可见成纤维细胞样细胞从骨片中迁移,并逐渐形成致密的贴壁层,可传代培养,且均一表达间充质细胞标志波形蛋白。分化实验表明,细胞具有明显的体外成骨和成脂肪能力。鉴于骨实质结构简单,本研究结果为MSC体内分布特性研究提供了有意义的数据。
The biological properties of cultured mesenchyrnal stem cells （MSC） have been intensively investigated, while there is still a paucity of information about the defmite in vivo sites that harbor these stem ceils due to the lack of specific surface markers. Previous data have demonstrated that human and murine MSC can be isolated from the compact bones. To investigate if it is the case for other species, the femurs from Wistar rats, Beagles, C57 mice and New Zealand rabbits were collected, minced and digested with collagenase type I. The digested bone fragments were seeded into the medium for human bone marrow culture after removal of the suspended cells in the digestion. The results showed that the fibroblast-like cells were observed to migrate from the bone fragments after several days of culture, and they gradually formed an adherent confluent layer. The adherent cells could be passaged and expressed homogenously the mesenchymal cell marker vimentin. Differentiation assays showed that these cells had the capacity to differentiate into osteoblasts and adipocytes. In conclusion, the results here provide new information for the further investigations on the in vivo biological features of MSC in the context of the simplicity of the compact bone structure.
出处
《中国实验血液学杂志》
CAS
CSCD
2010年第1期151-154,共4页
Journal of Experimental Hematology
基金
国家自然科学基金资助项目(编号30873018)
国家"863"资助课题(编号2007AA02Z454)
科学研究重大项目资助课题(编号2009zx09503-019)资助
