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首页> 外文期刊>Cell and Tissue Research >Multi-potent progenitors in freshly isolated and cultured human mesenchymal stem cells: a comparison between adipose and dermal tissue.
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Multi-potent progenitors in freshly isolated and cultured human mesenchymal stem cells: a comparison between adipose and dermal tissue.

机译:新鲜分离和培养的人间充质干细胞中的多能祖细胞:脂肪和皮肤组织之间的比较。

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Mesenchymal stem cells (MSCs) from human adult adipose tissue (A-MSCs) have a better differentiative ability than MSCs derived from the derma (D-MSCs). To test whether this difference is associated with differences in the content of multi-potent progenitors in A-MSCs, the number and the differentiative properties of multi-potent progenitors have been analyzed in various preparations of A-MSCs and D-MSCs. Adipogenic and osteogenic differentiation performed on colony-forming units have revealed that adipogenic and osteogenic progenitors are similar in the two populations, with only a slighty better performance of A-MSCs over D-MSCs from passages p0 to p15. An analysis of the presence of tri-, bi-, uni- and nulli-potent progenitors isolated immediately after isolation from tissues (p0) has shown comparable numbers of tri-potent and bi-potent progenitors in MSCs from the two tissues, whereas a higher content in uni-potent cells committed to adipocytes and a lower content in nulli-potent cells has been observed in A-MSCs. Furthermore, we have characterized the progenitors present in A-MSCs after six passages in vitro to verify the way in which in vitro culture can affect content in progenitor cells. We have observed that the percentage of tri-potent cells in A-MSCs at p6 remains similar to that observed at p0, although bi-potent and uni-potent progenitors committed to osteogenic differentiation increase at p6, whereas nulli-potent cells decrease at p6. These data indicate that the greater differentiative ability of A-MSC populations does not correlate directly with the number of multi-potent progenitors, suggesting that other factors influence the differentiation of bulk populations of A-MSCs.
机译:来自成人脂肪组织(A-MSC)的间充质干细胞(MSC)具有比源自皮肤的MSC(D-MSC)更好的分化能力。为了测试这种差异是否与A-MSC中多能祖细胞含量的差异有关,已经在各种A-MSC和D-MSC制剂中分析了多能祖细胞的数量和分化特性。在菌落形成单位上进行的成脂和成骨分化表明,在这两个种群中成脂和成骨祖细胞相似,从传代p0到p15,A-MSC的性能仅优于D-MSC。从组织中分离后立即分离出的三,双,单能和无能祖细胞的分析(p0)显示,来自两种组织的MSC中三能和双能祖细胞的数量相当。在A-MSC中,已观察到定型为脂肪细胞的单能细胞的含量较高,而无能细胞的含量较低。此外,我们已经表征了体外传代六次后A-MSC中存在的祖细胞,以验证体外培养可影响祖细胞含量的方式。我们已经观察到,尽管在p6致力于成骨分化的双能和单能祖细胞在p6处增加,而在p6处的A-MSC中三能细胞的百分比仍与在p0处观察到的相似。 。这些数据表明,A-MSC群体更大的分化能力与多能祖细胞的数量没有直接关系,这表明其他因素会影响A-MSC群体的分化。

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