多能干细胞来源的间充质干细胞衍生的细胞外囊泡在分化过程中获得了基质调节的蛋白质组模式。

Extracellular vesicles from pluripotent stem cell-derived mesenchymal stem cells acquire a stromal modulatory proteomic pattern during differentiation.

机构信息

LIAN-CONICET, FLENI, Ruta 9 Km 52,5 - (B1625XAF), Belén de Escobar, Buenos Aires, Argentina.

Agencia Nacional de Promoción Científica y Tecnolígica (ANPCyT), Buenos Aires, Argentina.

出版信息

Exp Mol Med. 2018 Sep 10;50(9):1-12. doi: 10.1038/s12276-018-0142-x.

Abstract

Mesenchymal stem/stromal cells (MSCs) obtained from pluripotent stem cells (PSCs) constitute an interesting alternative to classical MSCs in regenerative medicine. Among their many mechanisms of action, MSC extracellular vesicles (EVs) are a potential suitable substitute for MSCs in future cell-free-based therapeutic approaches. Unlike cells, EVs do not elicit acute immune rejection, and they can be produced in large quantities and stored until ready to use. Although the therapeutic potential of MSC EVs has already been proven, a thorough characterization of MSC EVs is lacking. In this work, we used a label-free liquid chromatography tandem mass spectrometry proteomic approach to identify the most abundant proteins in EVs that are secreted from MSCs derived from PSCs (PD-MSCs) and from their parental induced PSCs (iPSCs). Next, we compared both datasets and found that while iPSC EVs enclose proteins that modulate RNA and microRNA stability and protein sorting, PD-MSC EVs are rich in proteins that organize extracellular matrix, regulate locomotion, and influence cell-substrate adhesion. Moreover, compared to their respective cells, iPSCs and iPSC EVs share a greater proportion of proteins, while the PD-MSC proteome appears to be more specific. Correlation and principal component analysis consistently aggregate iPSCs and iPSC EVs but segregate PD-MSC and their EVs. Altogether, these findings suggest that during differentiation, compared with their parental iPSC EVs, PD-MSC EVs acquire a more specific set of proteins; arguably, this difference might confer their therapeutic properties.

摘要

多能干细胞(PSCs)来源的间充质干细胞/基质细胞(MSCs)在再生医学中构成了经典 MSCs 的一种有趣替代物。在其众多作用机制中,MSC 细胞外囊泡(EVs)是未来无细胞治疗方法中替代 MSC 的潜在合适替代品。与细胞不同,EVs 不会引起急性免疫排斥,并且可以大量生产并储存,直到准备使用。尽管 MSC EVs 的治疗潜力已经得到证实,但对 MSC EVs 的全面表征仍缺乏。在这项工作中,我们使用无标记液相色谱串联质谱蛋白质组学方法来鉴定源自 PSCs(PD-MSCs)及其亲本诱导 PSCs(iPSCs)的 MSC EVs 中分泌的最丰富的蛋白质。接下来,我们比较了这两个数据集,发现虽然 iPSC EVs 包含调节 RNA 和 microRNA 稳定性和蛋白质分类的蛋白质,但 PD-MSC EVs 富含组织细胞外基质、调节运动和影响细胞-底物附着的蛋白质。此外,与各自的细胞相比,iPSCs 和 iPSC EVs 共享更多比例的蛋白质,而 PD-MSC 蛋白质组似乎更具特异性。相关性和主成分分析一致地将 iPSCs 和 iPSC EVs 聚集在一起,但将 PD-MSC 和它们的 EVs 分开。总之,这些发现表明,在分化过程中,与它们的亲本 iPSC EVs 相比,PD-MSC EVs 获得了一组更特异的蛋白质;可以说,这种差异可能赋予了它们治疗特性。

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