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具有天然胶原支架的生物真皮模板可为入侵细胞提供导向脊,可能促进有结构的真皮伤口愈合。

Biological dermal templates with native collagen scaffolds provide guiding ridges for invading cells and may promote structured dermal wound healing.

机构信息

Department of Clinical Sciences, Division of Infection Medicine, Lund University, Lund, Sweden.

Colzyx AB, Lund, Sweden.

出版信息

Int Wound J. 2020 Jun;17(3):618-630. doi: 10.1111/iwj.13314. Epub 2020 Feb 11.

Abstract

Dermal substitutes are of major importance in treating full thickness skin defects. They come in a variety of materials manufactured into various forms, such as films, hydrocolloids, hydrogels, sponges, membranes, and electrospun micro- and nanofibers. Bioactive dermal substitutes act in wound healing either by delivery of bioactive compounds or by being constructed from materials having endogenous activity. The healing success rate is highly determined by cellular and physiological processes at the host-biomaterial interface during crucial wound healing steps. Hence, it is important to design appropriate wound treatment strategies with the ability to work actively with tissues and cells to enhance healing. Therefore, in this study, we investigated biological dermal templates and their potential to stimulate natural cell adherence, guidance, and morphology. The most pronounced effect was observed in biomaterials with the highest content of native collagen networks. Cell attachment and proliferation were significantly enhanced on native collagen scaffolds. Cell morphology was more asymmetrical on such scaffolds, resembling native in vivo structures. Importantly, considerably lower expression of myofibroblast phenotype was observed on native collagen scaffolds. Our data suggest that this treatment strategy might be beneficial for the wound environment, with the potential to promote improved tissue regeneration and reduce abnormal scar formation.

摘要

皮肤替代物在治疗全层皮肤缺损方面具有重要意义。它们有多种材料制成,呈各种形式,如膜、水胶体、水凝胶、海绵、膜和电纺微/纳米纤维。生物活性皮肤替代物通过输送生物活性化合物或由具有内源性活性的材料构建来在伤口愈合中发挥作用。愈合成功率在很大程度上取决于宿主-生物材料界面在关键伤口愈合步骤中的细胞和生理过程。因此,设计具有与组织和细胞积极协同作用以增强愈合能力的适当伤口治疗策略非常重要。因此,在这项研究中,我们研究了生物皮肤模板及其刺激天然细胞黏附、导向和形态的潜力。在含有最高含量天然胶原网络的生物材料中观察到最显著的效果。细胞附着和增殖在天然胶原支架上显著增强。在这些支架上,细胞形态更加不对称,类似于体内的天然结构。重要的是,在天然胶原支架上观察到肌成纤维细胞表型的表达明显降低。我们的数据表明,这种治疗策略可能对伤口环境有益,有可能促进组织再生的改善和减少异常瘢痕形成。

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