Stem Cell Research Center, Tabriz University of Medical Sciences, Tabriz, Iran; Department of Medicinal Chemistry, Faculty of Pharmacy, Tabriz University of Medical Sciences, Tabriz, Iran.
Stem Cell Research Center, Tabriz University of Medical Sciences, Tabriz, Iran.
Eur J Pharm Biopharm. 2022 Feb;171:50-59. doi: 10.1016/j.ejpb.2021.11.002. Epub 2021 Nov 15.
The treatment of unhealable and chronic cutaneous wounds is a significant challenge for the healthcare system. Hence, there has been heightened interest in the development of innovative therapeutic approaches for the acceleration of wound healing. Regenerative medicine based on mesenchymal stem cells (MSCs) has shown appropriate potential in skin repair. The regenerative properties of stem cells are mainly attributed to paracrine effects of secreted products, including exosomes. There are advantages to using exosomes as a cell-free approach instead of direct application of stem cells. Exosomes have the nanoscale dimension and are immune-tolerant. They can easily endocytose, and transfer the cargo content to recipient cells. They contribute to the regulation of the wound healing process by activating specific signaling pathways. To preserve exosome bioactivity and controlled release of effective concentration during prolonged wound care, the design of an optimized delivery system is necessary. Accordingly, hydrogels with their unique properties are promising candidates as exosome delivery and wound management products. This article investigates the characteristics of exosomes, their molecular mechanism in wound healing, and the advantages of the hydrogel delivery system. Also, published reports on the potential of exosome-loaded hydrogels in skin regeneration have been reviewed.
治疗无法愈合和慢性皮肤创伤是医疗体系面临的重大挑战。因此,人们对开发创新治疗方法以加速创伤愈合产生了浓厚的兴趣。基于间充质干细胞(MSCs)的再生医学在皮肤修复方面显示出了适当的潜力。干细胞的再生特性主要归因于分泌产物(包括外泌体)的旁分泌作用。与直接应用干细胞相比,使用外泌体作为无细胞方法具有优势。外泌体具有纳米级尺寸和免疫耐受性。它们可以容易地被内吞,并将货物内容转移到受体细胞。它们通过激活特定的信号通路来促进伤口愈合过程的调节。为了在长时间的伤口护理过程中保持外泌体的生物活性和有效浓度的控制释放,有必要设计优化的输送系统。因此,具有独特性质的水凝胶是作为外泌体输送和伤口管理产品的有前途的候选物。本文研究了外泌体的特性、它们在伤口愈合中的分子机制,以及水凝胶输送系统的优势。此外,还综述了载外泌体水凝胶在皮肤再生方面的潜在应用。
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