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miRNA-29b调控骨髓间充质干细胞来源的软骨细胞肥大化的作用研究

, PP. 952-956

Keywords: miR-b,间充质干细胞,软骨细胞,肥大化

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Abstract:

目的探讨miR-29b在骨髓间充质干细胞(bonemarrowmesenchymalstemcells,BMSCs)分化为软骨细胞时,对细胞肥大化进程的调控作用。方法培养BMSCs并进行软骨细胞肥大化方向的诱导,检测软骨细胞标志基因Ⅱ型胶原(ColⅡ)、肥大化细胞标志基因Ⅹ型胶原(ColⅩ和Runx2),并用特异性染色法确定细胞肥大化诱导成功,再检测miR-29b在转录水平的表达情况。然后将实验分为miR-29b过表达(miR-29bmimics)和miR-29b抑制(miR-29b抑制剂)两组,每组分别设置空白对照组,分别检测两处理组中上述软骨细胞和肥大化细胞相关标志的表达变化。结果miR-29b过表达组中,ColⅡ表达与对照组相比显著降低(P<0.05),ColⅩ和Runx2表达显著升高(P<0.05);而miR-29b抑制组中,ColⅡ的表达与对照组相比显著升高(P<0.05),ColⅩ和Runx2显著降低(P<0.05)。结论miR-29可以有效促进BMSCs向肥大化的软骨细胞分化,而抑制miR-29b可降低BMSCs来源的软骨细胞的肥大化。

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