Biomaterials:与pDNA和shRNA复合的基因调控纳米粒子的转染可控制hMSCs的多向分化

2018-06-22 MedSci MedSci原创

为了达到治疗目的,过表达和敲低特定蛋白可以控制干细胞分化。在本研究中,我们制备了RUNX2,SOX9和C/EBPα质粒DNA(pDNAs)和ATF4靶向shRNA(shATF4),以诱导人骨髓间充质干细胞(hMSCs)的成骨、软骨形成和脂肪形成。pDNA和shATF4与TRITC基因调控纳米颗粒(GRN)复合。在共递送shATF4和SOX9或C/EBPαpDNA之后的早期(12h)和晚期(36h)

为了达到治疗目的,过表达和敲低特定蛋白可以控制干细胞分化。在本研究中,我们制备了RUNX2,SOX9和C/EBPα质粒DNA(pDNAs)和ATF4靶向shRNA(shATF4),以诱导人骨髓间充质干细胞(hMSCs)的成骨、软骨形成和脂肪形成。

pDNA和shATF4与TRITC基因调控纳米颗粒(GRN)复合。在共递送shATF4和SOX9或C/EBPαpDNA之后的早期(12h)和晚期(36h),成骨相关基因表达降低,且这些hMSCs的成骨受到抑制。相反,在共递送RUNX2和ATF4 pDNAs后,成骨相关基因高度表达。GRN中的DEX增强软骨形成分化。在用RUNX2和ATF4 pDNAs,shATF4和SOX9 pDNA以及shATF4和C/EBPαpDNA复合72h的NPs转染的hMSCs中,骨生成、软骨形成和脂肪生成相关基因的表达均高于对照hMSCs。此外,这些NPs的递送还增加骨生成、软骨形成和脂肪生成相关蛋白的表达。

综上所述,这些表达改变导致形态学改变,表明hMSCs分化成成骨细胞、软骨细胞和脂肪细胞。

原始出处:

Kim HJ, Yi SW, et al., Transfection of gene regulation nanoparticles complexed with pDNA and shRNA controls multilineage differentiation of hMSCs. Biomaterials. 2018 May 29;177:1-13. doi: 10.1016/j.biomaterials.2018.05.035. 

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    2018-09-27 sunylz
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    2018-06-24 huanbaofeng
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    2018-06-24 zhanfl
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    2018-06-22 changjiu

    学习一下谢谢

    0