首页> 外文期刊>Acta biomaterialia >Bone marrow mesenchymal stem cell-derived exosomes promote tendon regeneration by facilitating the proliferation and migration of endogenous tendon stem/progenitor cells
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Bone marrow mesenchymal stem cell-derived exosomes promote tendon regeneration by facilitating the proliferation and migration of endogenous tendon stem/progenitor cells

机译:骨髓间充质干细胞衍生的外泌体通过促进内源性肌腱茎/祖细胞的增殖和迁移来促进肌腱再生

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Mesenchymal stem cells (MSCs)-derived exosomes are being increasingly focused as the new biological pro-regenerative therapeutic agents for various types of tissue injury. Here, we explored the potential of a novel exosome-based therapeutic application combined with a local fibrin delivery strategy for tendon repair. After discovering that bone marrow mesenchymal stem cells-derived exosomes (BMSCs-exos) promoted the proliferation, migration and tenogenic differentiation of tendon stem/progenitor cells (TSPCs) in vitro, we embedded BMSCs-exos in fibrin and injected it into the defect area of rat patellar tendon, and the results showed that the exosomes could be controlled-released from the fibrin, retained within the defect area, and internalized by TSPCs. BMSCs-exos embedded in fibrin significantly improved the histological scores, enhanced the expression of mohawk, tenomodulin, and type I collagen, as well as the mechanical properties of neotendon, and also promoted the proliferation of local TSPCs in vivo. Overall, we demonstrated the beneficial role of BMSCs-exos in tendon regeneration, and that fibrin-exosomes delivery system represents a successful local treatment strategy of exosomes. This study brings prospects in the potential application of exosomes in novel therapies for tendon injury.
机译:间充质干细胞(MSCs)的前除剂越来越聚焦为新的生物促再生治疗剂,用于各种类型的组织损伤。在这里,我们探讨了新型外科治疗申请的潜力,所述潜在应用与肌腱修复的局部纤维蛋白输送策略相结合。在发现骨髓间充质干细胞衍生的外泌体(BMSCS-EXOS)促进体外增殖,迁移和祖细胞(TSPCS)的增殖,迁移和遗传分化,我们嵌入纤维蛋白中的BMSCS-EXOS并将其注入缺陷区域大鼠髌骨肌腱,结果表明,外来物可以从纤维蛋白控制释放,保留在缺陷区域内,并通过TSPCS内化。 BMSCS-EXOS嵌入纤维蛋白中显着改善了组织学评分,增强了莫霍克,替敦素和I型胶原蛋白的表达,以及Neotendon的机械性能,并且还促进了体内局部Tspcs的增殖。总体而言,我们证明了BMSCS-EXOS在肌腱再生中的有益作用,并且纤维蛋白 - 外泌素输送系统代表了外来物的成功局部治疗策略。该研究为外来肌腱疗法潜在应用的前景潜在应用于肌腱损伤的新疗法中。

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