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Self-assembled cell sheets composed of mesenchymal stem cells and gelatin nanofibers for the treatment of full-thickness wounds

机译:由间充质干细胞和明胶纳米纤维组成的自组装细胞片,用于治疗全厚伤口

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摘要

Cell sheet engineering has attracted great attention because thin layers of tissue can be easily transplanted to defect sites. Wound-dressing materials are required to support fast re-epithelization, both with keratinocytes and fibroblasts, to enhance the prognosis and therapeutic outcomes. We prepared self-assembled cell sheets composed of adipocyte-derived stem cells (ADSCs) and surface-engineered nanofibrils (NFs). NFs were surface-engineered with multilayers of gelatin so that the cell sheets could spontaneously assemble within 3 days in cell culture plates. Dorsal wounds transplanted with the cell sheets exhibited higher wound-healing rates when a high concentration of gelatin was immobilized on the surfaces of the NFs. Histochemical staining revealed that those with gelatin-immobilized NFs showed a higher expression of cytokeratin and collagen in the re-epithelized epidermis. Keratinocytic differentiation of the epidermis was molecularly evidenced by the higher expression of keratinocyte-specific genes.
机译:蜂窝板工程引起了极大的关注,因为薄层组织可以容易移植到缺陷位点。需要伤口敷料材料来支持与角质形成细胞和成纤维细胞的快速重塑化,以增强预后和治疗结果。我们制备了由脂肪细胞衍生的干细胞(ADSCs)和表面设计的纳米纤维(NFS)组成的自组装细胞片。 NFS与明胶多层进行表面设计,使得细胞片可以在细胞培养板中3天内自发组装。当用细胞片移植的背部伤口表现出更高的伤口愈合速率,当高浓度的明胶固定在NFS的表面上时。组织化学染色表明,具有明胶 - 固定的NFS的那些在重新上皮的表皮中表达了细胞角蛋白和胶原蛋白的表达。表皮的角质质节细胞分化是通过表皮细胞特异性基因的较高表达的分子证明。

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