Eur Cell Mater:人脂肪干细胞在三维条件下的成骨分化

2019-05-25 不详 网络

体外脂肪来源的干细胞(ADSCs)的扩增和分化通常在二维(2D)环境中进行。研究假设是利用模拟天然干细胞生态位的三维(3D)培养条件可能会增加ADSC的成骨分化。将人ADSC接种在缺乏生物活性物质组分的3D培养系统中:球状体和聚苯乙烯支架。与2D培养物相比,ALP活性(早期成骨的标志物)在接种在聚苯乙烯支架上的ADSC球状体和ADSC中更高。此外,与聚苯乙烯支架和2D培养相比,成骨细胞标记基因Ru

体外脂肪来源的干细胞(ADSCs)的扩增和分化通常在二维(2D)环境中进行。研究假设是利用模拟天然干细胞生态位的三维(3D)培养条件可能会增加ADSC的成骨分化。

将人ADSC接种在缺乏生物活性物质组分的3D培养系统中:球状体和聚苯乙烯支架。与2D培养物相比,ALP活性(早期成骨的标志物)在接种在聚苯乙烯支架上的ADSC球状体和ADSC中更高。此外,与聚苯乙烯支架和2D培养相比,成骨细胞标记基因Runt相关转录因子2(RUNX2),osterix和整联蛋白结合唾液蛋白(IBSP)的表达在球状体中显著上调。通过蛋白质印迹和免疫荧光分别在蛋白质水平证实了球状体中RUNX2和IBSP水平的升高。在第14天,球状体中的骨矿物质产量低于聚苯乙烯支架和2D培养物。与2D培养相比,奇怪地,脂肪细胞分化在球状体中下调。最后,为了诱导晚期分化事件,在7天成骨预分化培养后细胞与球状体解离,并在成骨细胞成熟培养基中重新进行2D培养。在随后的成熟14天后,细胞产生骨矿物质和骨钙蛋白,这是晚期成骨细胞标记物。

综上所述,目前的工作表明,3D环境可能为ADSCs对成骨谱系的分化提供额外的刺激。此外,当设计制备用于骨再生临床研究的ADSC的方案时,所呈现的数据可能是有价值的。

原始出处:

Rumiński S, Kalaszczyńska I, et al., Osteogenic differentiation of human adipose-derived stem cells in 3D conditions - comparison of spheroids and polystyrene scaffolds. Eur Cell Mater. 2019 May 17;37:382-401. doi: 10.22203/eCM.v037a23.

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    2020-01-22 维他命
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    2019-05-27 zhaojie88
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