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首页> 外文期刊>Cell biology international. >Characterization of mesenchymal stem cells isolated from the human umbilical cord.
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Characterization of mesenchymal stem cells isolated from the human umbilical cord.

机译:从人脐带分离的间充质干细胞的特征。

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Numerous papers have reported that mesenchymal stem cells (MSCs) can be isolated from various sources such as bone marrow, adipose tissue and others. Nonetheless it is an open question whether MSCs isolated from different sources represent a single cell lineage or if cells residing in different organs are separate members of a family of MSCs. Subendothelial tissue of the umbilical cord vein has been shown to be a promising source of MSCs. The aim of this study was to isolate and characterize cells derived from the subendothelial layer of umbilical cord veins as regards their clonogenicity and differentiation potential. The results from these experiments show that cells isolated from the umbilical cord vein displayed fibroblast-like morphology and grew into colonies. Immunophenotyping by flow cytometry revealed that the isolated cells were negative for the hematopoietic line markers HLA-DR and CD34 but were positive for CD29, CD90 and CD73. The isolated cells were also positive for survivin, Bcl-2, vimentin and endoglin, as confirmed by RT-PCR and immunofluorescence. These cells can be induced to differentiate into osteogenic and adipogenic cells, but a new finding is that these cells can be induced to differentiate into endothelial cells expressing CD31, vWF and KDR-2, and also form vessel-like structures in Matrigel. The differentiated cells stopped expressing survivin, thus showing a diminished proliferative potential. It can be assumed that the subendothelial layer of the umbilical cord vein contains a population of cells with the overall characteristics of MSCs, with the additional capability to transform into endothelial cells.
机译:许多论文报道,间充质干细胞(MSCs)可以从各种来源分离,例如骨髓,脂肪组织等。尽管如此,从不同来源分离的MSC是否代表单个细胞谱系还是驻留在不同器官中的细胞是否是MSC家族的独立成员,这是一个悬而未决的问题。脐静脉的内皮下组织已被证明是有希望的MSC来源。这项研究的目的是就脐带静脉的内皮下层的克隆形成能力和分化潜能进行分离和鉴定。这些实验的结果表明,从脐带静脉分离出的细胞表现出成纤维细胞样的形态并长成菌落。流式细胞术免疫分型显示,分离的细胞对造血细胞系标记物HLA-DR和CD34阴性,但对CD29,CD90和CD73阳性。如RT-PCR和免疫荧光所证实,分离的细胞还对survivin,Bcl-2,波形蛋白和内皮糖蛋白呈阳性。可以诱导这些细胞分化为成骨和成脂细胞,但是一个新发现是,可以诱导这些细胞分化为表达CD31,vWF和KDR-2的内皮细胞,并在基质胶中形成血管样结构。分化的细胞停止表达survivin,因此显示增殖潜能降低。可以假设,脐带静脉的内皮下层包含具有MSC总体特征的细胞群,并具有转化为内皮细胞的额外能力。

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