Stem Cells Int:机械牵张可促进骨的缺损修复

2019-07-31 不详 网络

促红细胞生成素(EPO)对骨髓间充质干细胞(BMSCs)机械牵张行为的影响尚不清楚。因此,本研究旨在确定EPO刺激对大鼠骨髓间充质干细胞的剂量反应效应,并研究机械拉伸联合EPO对骨髓间充质干细胞增殖和成骨分化的影响。采用不同浓度的EPO检测大鼠骨髓间充质干细胞的增殖和成骨分化。此后,使用Flexcell菌株单元将BMSC进行10%伸长,并与20IU/ml EPO组合。通过细胞计数试剂盒-8,集落形

促红细胞生成素(EPO)对骨髓间充质干细胞(BMSCs)机械牵张行为的影响尚不清楚。因此,本研究旨在确定EPO刺激对大鼠骨髓间充质干细胞的剂量反应效应,并研究机械拉伸联合EPO对骨髓间充质干细胞增殖和成骨分化的影响。

采用不同浓度的EPO检测大鼠骨髓间充质干细胞的增殖和成骨分化。此后,使用Flexcell菌株单元将BMSC进行10%伸长,并与20IU/ml EPO组合。通过细胞计数试剂盒-8,集落形成试验和细胞周期试验检测BMSCs的增殖;同时,通过逆转录和实时定量PCR(qPCR)检测Ets-1,C-myc,Ccnd1和C-fos的mRNA表达水平。通过碱性磷酸酶(ALP)染色检测BMSCs的成骨分化,并通过qPCR检测ALP,OCN,COL和Runx2的mRNA表达水平。通过Western印迹检查细胞外信号调节激酶1/2(ERK1/2)在通过机械牵张和20IU/ml EPO刺激的BMSC的成骨中的作用。

结果显示,EPO对BMSC的作用包括剂量-反应关系,20IU/ml EPO产生最大。机械牵张结合20IU/ml EPO促进BMSCs的增殖和成骨分化。由机械牵张-EPO组合诱导的ALP,矿物质沉积和成骨细胞基因的增加被ERK1/2抑制剂U0126抑制。

综上所述,该研究结果表明,EPO能够促进BMSCs的增殖和成骨分化,并且当与机械拉伸结合时这些效果得到增强。潜在的机制可能与ERK1/2信号传导途径的激活有关。

原始出处:

He YB, Liu SY, et al., Mechanical Stretch Promotes the Osteogenic Differentiation of Bone Mesenchymal Stem Cells Induced by Erythropoietin. Stem Cells Int. 2019 Jul 7;2019:1839627. doi: 10.1155/2019/1839627. eCollection 2019.

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    2020-04-11 维他命
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