3-D tissue-engineered epidermis against human primary keratinocytes apoptosis via relieving mitochondrial oxidative stress in wound healing.

IF 6.7 1区 工程技术 Q1 CELL & TISSUE ENGINEERING
Shan He, Han Wu, Junqun Huang, Qingyan Li, Zijie Huang, Huangding Wen, Zhiqing Li
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Abstract

The tissue-engineered epidermal (TEE), composed of biocompatible vectors and autogenous functional cells, is a novel strategy to solve the problem of shortage of donor skin sources. The human primary keratinocyte (HPK), the major skin components, are self-evident vital in wound healing and was considered as one of the preferred seed cells for TEEs. Since the process of separating HPKs from the skin triggers a stress state of the cells, achieving its rapid adhesion and proliferation on biomaterials remains challenging. The key to the clinical application is to ensure the normal function of cells while improving the proliferation ability in vitro, and to complete the complex mesenchymal epithelialization to achieve tissue remodeling after vivo implantation. Herein, in order to aid HPKs adhesion and proliferation in vitro and promoting wound healing, we developed a three dimensional collagen scaffold with Y-27632 sustainedly released from the nanoplatform, hollow mesoporous organosilica nanoparticles (HMON). The results showed that the porous structure within the TEE supports the implanted HPKs expanding in a three-dimensional mode to jointly construct the tissue-engineered epidermis in vitro and inhibited the mitochondria-mediated cell apoptosis. It was confirmed that the TEEs with suitable degradation rate could maintain drug release after implantation and could accelerate vascularization of wound base and further revealed the involvement of mesenchymal transformation of transplanted HPKs during skin regeneration in a nude mouse model with full-thickness skin resection. In conclusion, our study highlights the great potential of constructing TEE using a nanoparticle platform for the treatment of large-area skin defects.

3-D组织工程表皮通过缓解线粒体氧化应激在伤口愈合中抑制人原代角质形成细胞凋亡。
由生物相容性载体和自体功能细胞组成的组织工程表皮(TEE)是解决供体皮肤来源不足的一种新策略。人原代角质细胞(HPK)是皮肤的主要成分,在伤口愈合中起着不言而喻的重要作用,被认为是tee的首选种子细胞之一。由于从皮肤中分离HPKs的过程会触发细胞的应激状态,因此实现其在生物材料上的快速粘附和增殖仍然具有挑战性。临床应用的关键是在体外提高细胞增殖能力的同时保证细胞的正常功能,并在体内植入后完成复杂的间质上皮化,实现组织重塑。为了促进hks在体外的粘附和增殖,促进伤口愈合,我们在纳米平台上持续释放Y-27632,开发了一种三维胶原支架——中空介孔有机二氧化硅纳米颗粒(HMON)。结果表明,TEE内的多孔结构支持植入的HPKs在体外三维扩张模式下共同构建组织工程表皮,并抑制线粒体介导的细胞凋亡。在全层皮肤切除裸鼠模型中证实了适当降解率的tee能够维持植入后的药物释放,并能加速创面的血管化,进一步揭示了移植HPKs在皮肤再生过程中的间质转化参与。总之,我们的研究强调了利用纳米粒子平台构建TEE治疗大面积皮肤缺陷的巨大潜力。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
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来源期刊
Journal of Tissue Engineering
Journal of Tissue Engineering Engineering-Biomedical Engineering
CiteScore
11.60
自引率
4.90%
发文量
52
审稿时长
12 weeks
期刊介绍: The Journal of Tissue Engineering (JTE) is a peer-reviewed, open-access journal dedicated to scientific research in the field of tissue engineering and its clinical applications. Our journal encompasses a wide range of interests, from the fundamental aspects of stem cells and progenitor cells, including their expansion to viable numbers, to an in-depth understanding of their differentiation processes. Join us in exploring the latest advancements in tissue engineering and its clinical translation.
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