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Accelerated wound repair and promoted angiogenesis in a tropoelastin modified dermal regeneration template

机译:在原弹性蛋白修饰的皮肤再生模板中加速伤口修复并促进血管生成

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Severe burn injury results in substantial skin loss and cannot be treated by autografts. The Integra Dermal Regeneration Template (IDRT) is the leading synthetic skin substitute because it allows for wound bed regeneration and wound healing. However, all substitutes suffer from slow blood vessel ingrowth and would benefit considerably from enhanced vascularization to nurture tissue repair. It is shown here that by incorporating the human elastic protein tropoelastin into a dermal regeneration template (TDRT) we can promote angiogenesis in wound healing. In small and large animal models comprising mice and pigs, the hybrid TDRT biomaterial and IDRT show similar contraction to autografts and decrease wound contraction compared to open wounds. In mice, TDRT accelerates early stage angiogenesis by 2 weeks, as evidenced by increased angiogenesis fluorescent radiant efficiency in live animal imaging and the expression of endothelial cell adhesion marker CD146. In the pig, a full thickness wound repair model confirms increased numbers of blood vessels in the regenerating areas of the dermis closest to the hypodermis and immediately below the epidermis at 2 weeks postsurgery. It is concluded that including tropoelastin in a dermal regeneration template has the potential to promote wound repair through enhanced vascularization.
机译:严重烧伤会导致大量皮肤损失,无法通过自体移植进行治疗。整合式皮肤再生模板(IDRT)是领先的合成皮肤替代品,因为它可以伤口床再生和伤口愈合。然而,所有替代品均受血管向内生长缓慢的困扰,并且将从增强血管形成以培育组织修复中获益良多。在此表明,通过将人弹性蛋白原弹性蛋白掺入皮肤再生模板(TDRT)中,我们可以促进伤口愈合中的血管生成。在包括小鼠和猪的小型和大型动物模型中,与开放性伤口相比,TDRT混合生物材料和IDRT的收缩表现出与自体移植相似的收缩,并且减少了伤口收缩。在小鼠中,TDRT将早期血管生成加速了2周,这在活体动物成像中血管生成荧光辐射效率的提高和内皮细胞粘附标记CD146的表达中得到了证明。在猪中,全厚度伤口修复模型证实了术后2周时最靠近皮下并在表皮正下方的真皮再生区域中血管的数量增加。结论是,在皮肤再生模板中包含原弹性蛋白具有通过增强血管生成促进伤口修复的潜力。

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