Therapeutic microparticles functionalized with biomimetic cardiac stem cell membranes and secretome.

Therapeutic microparticles functionalized with biomimetic cardiac stem cell membranes and secretome.
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用仿生心脏干细胞膜和分泌组功能化的治疗性微粒

DOI:
10.1038/ncomms13724
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发表时间:
2017-01-03
影响因子:
16.6
通讯作者:
Cheng K
Cheng K
中科院分区:
综合性期刊1区
文献类型:
--
作者:
Tang J;Shen D;Caranasos TG;Wang Z;Vandergriff AC;Allen TA;Hensley MT;Dinh PU;Cores J;Li TS;Zhang J;Kan Q;Cheng K

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干细胞疗法在再生医学中是一种很有前景的策略。然而,细胞在使用前需要精心保存和处理。此外,细胞移植存在免疫原性和/或致瘤性风险。越来越多的证据表明,干细胞主要通过(分泌再生因子)以及与受损细胞基于细胞膜的细胞 - 细胞相互作用来发挥其有益作用。在此,我们制造了一种模拟细胞的合成微粒(CMMP),它能重现干细胞在组织修复中的功能。CMMP携带与真正的心脏干细胞相似的分泌蛋白和细胞膜。在心肌梗死小鼠模型中,注射CMMP可使存活心肌得以保留,心脏功能增强,这与心脏干细胞疗法相似。(源自人类细胞的)CMMP不会刺激免疫健全小鼠的T细胞浸润。总之,CMMP可作为“合成干细胞”,在治疗性心脏再生中模拟天然干细胞的旁分泌和生物界面活动。 干细胞通过分泌再生因子发挥其有益作用。在此,作者从心脏干细胞中获取细胞膜和分泌因子,并制造出一种模拟细胞的合成微粒,将其注射到心肌梗死小鼠模型中时,可改善心脏功能。
Stem cell therapy represents a promising strategy in regenerative medicine. However, cells need to be carefully preserved and processed before usage. In addition, cell transplantation carries immunogenicity and/or tumourigenicity risks. Mounting lines of evidence indicate that stem cells exert their beneficial effects mainly through secretion (of regenerative factors) and membrane-based cell–cell interaction with the injured cells. Here, we fabricate a synthetic cell-mimicking microparticle (CMMP) that recapitulates stem cell functions in tissue repair. CMMPs carry similar secreted proteins and membranes as genuine cardiac stem cells do. In a mouse model of myocardial infarction, injection of CMMPs leads to the preservation of viable myocardium and augmentation of cardiac functions similar to cardiac stem cell therapy. CMMPs (derived from human cells) do not stimulate T-cell infiltration in immuno-competent mice. In conclusion, CMMPs act as ‘synthetic stem cells’ which mimic the paracrine and biointerfacing activities of natural stem cells in therapeutic cardiac regeneration. Stem cells exert their beneficial effects through secretion of regenerative factors. Here, the authors take the membranes and secreted factors from cardiac stem cells and generate a synthetic cell-mimicking microparticle, which, on injection in a mouse model of myocardial infarction, improves cardiac function.
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