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Int J Nanomed:脂质表面修饰增加间充质干细胞中的中孔二氧化硅纳米颗粒的表面标记

2019-02-04 MedSci MedSci原创

纳米粒子已经成为有前途的细胞标记工具,因为它们可以根据化学和物理特性精确定制。特别地,介孔二氧化硅纳米粒子(MSN)在表面和核心化学方面易于调节,并且能够有效地限制染料和药物分子。本研究旨在探究脂质和聚乙二醇(PEG)表面修饰对MSN干细胞追踪能力的影响。研究人员合成了脂质和PEG表面功能化的MSN,并且在患者来源的间充质干细胞(MSC)中研究了表面功能化对细胞内化、增殖、分化和细胞蛋白质组学的影

纳米粒子已经成为有前途的细胞标记工具,因为它们可以根据化学和物理特性精确定制。特别地,介孔二氧化硅纳米粒子(MSN)在表面和核心化学方面易于调节,并且能够有效地限制染料和药物分子。本研究旨在探究脂质和聚乙二醇(PEG)表面修饰对MSN干细胞追踪能力的影响。

研究人员合成了脂质和PEG表面功能化的MSN,并且在患者来源的间充质干细胞(MSC)中研究了表面功能化对细胞内化、增殖、分化和细胞蛋白质组学的影响。

结果显示,MSN和脂质表面修饰的MSN被> 80%的MSC群体内化,除了用短PEG链修饰的纳米颗粒(分子量750 [MSN-PEG750])。脂质修饰的MSN具有更高的标记效率,在暴露2小时后具有最大摄取,并且与未修饰的MSN相比另外内化17倍,而不会对分化能力产生负面影响。使用基于质谱的无标记定量蛋白质组学方法,我们显示MSN标记导致蛋白质的上调和下调,这对于不同的表面修饰的MSN是独特的。此外,在用MSN,MSN-PEG750和脂质修饰的MSN标记的人MSC中发现功能性富集。

在这里,我们显示脂质和聚乙二醇化的有机修饰可以用作改善MSN标记能力的有希望的策略。特别地,我们显示脂质修饰可以以三种不同的方式优化这些探针:显著改善信号强度,持续释放额外探针的屏障,以及改善的干细胞标记效率。

原始出处:

Rosenbrand R, Barata D, et al., Lipid surface modifications increase mesoporous silica nanoparticle labeling properties in mesenchymal stem cells. Int J Nanomedicine. 2018 Nov 20;13:7711-7725. doi: 10.2147/IJN.S182428. eCollection 2018.

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    2019-02-05 zhangyxzsh
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