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用于创伤愈合应用的负载间充质干细胞的壳聚糖/糖胺聚糖季铵盐水凝胶支架的设计与评价。

Design and evaluation of mesenchymal stem cells seeded chitosan/glycosaminoglycans quaternary hydrogel scaffolds for wound healing applications.

机构信息

Department of Pharmacy and Pharmaceutical Technology, Faculty of Pharmacy, University of Granada, University Campus of Cartuja, 18071 Granada, Spain.

Department of Health Sciences, University of Jaén, 23071 Jaén, Spain; Biopathology and Regenerative Medicine Institute (IBIMER), Centre for Biomedical Research, University of Granada, 18100 Granada, Spain.

出版信息

Int J Pharm. 2019 Oct 30;570:118632. doi: 10.1016/j.ijpharm.2019.118632. Epub 2019 Aug 19.

Abstract

The main goal of this study was the design, development and characterization of a chitosan based scaffolding substrate including three glycosaminoglycans and collagen to provide an optimal microenvironment for human mesemchymal stem cells isolated from adipose tissue (hMSCs). Chitosan scaffolds provide a moist wound environment which promotes healing and epidermal regeneration. Furthermore, the importance of extracellular molecules such as glycosaminoglycans in wound healing makes them essential ingredients in these types of formulations. The physical properties of hydrogels scaffolds and stability were investigated. The scaffolds were evaluated by structural and microscopic assays, as well as cell culture analyses. The hydrogel with best suitable properties was selected as candidate scaffold for hMSCs encapsulation. The viability of hMSCs remained above 75%, indicating good cell viability. The number of living hMSCs in the scaffold reached a steady state up to ~100% at days 5 and 7. Scanning electron microscopy showed irregular compartments with the presence of the hMSCs. These findings indicated that our hydrogel scaffold provided a suitable niche for cell viability which could be considered a promising candidate for further in vivo studies.

摘要

本研究的主要目标是设计、开发和表征一种基于壳聚糖的支架基质,包括三种糖胺聚糖和胶原蛋白,为从脂肪组织中分离出的人间充质干细胞(hMSCs)提供最佳的微环境。壳聚糖支架提供了一个湿润的伤口环境,促进愈合和表皮再生。此外,细胞外分子如糖胺聚糖在伤口愈合中的重要性使它们成为这类配方的必需成分。研究了水凝胶支架的物理性质和稳定性。通过结构和微观分析以及细胞培养分析对支架进行了评估。选择具有最佳性能的水凝胶作为 hMSCs 包封的候选支架。hMSCs 的存活率保持在 75%以上,表明细胞活力良好。在第 5 天和第 7 天,支架中活的 hMSCs 数量达到稳定状态,达到约 100%。扫描电子显微镜显示存在不规则的隔室,其中存在 hMSCs。这些发现表明,我们的水凝胶支架为细胞活力提供了一个合适的小生境,可被视为进一步体内研究的有前途的候选物。

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