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In vivo In vivo study of alginate hydrogel conglutinating cells to polycaprolactone vascular scaffolds fabricated by electrospinning

机译:在体内研究海藻酸盐水凝胶刚凝集细胞的静电术血管内血管支架的研究

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Abstract Objective The aim of this study was to explore an innovative cell‐seeding technology applied on artificial vascular scaffolds. Methods Scaffolds were fabricated by electrospinning polycaprolactone (PCL) and seeded with rat endothelial progenitor cells differentiated from adipose‐derived stem cells. Then, we modified the PCL scaffolds through the use of alginate hydrogel conglutinating cells (AHCC), a blank alginate hydrogel coating (BAHC), and natural sedimentation seeding cells (NSSC). The blank PCL (BP) scaffolds without any modifications were considered the blank control group. After modification, the scaffolds were implanted in a rat model. The implanted scaffolds were harvested and observed using histological and immunohistochemical methods and scanning electron microscopy (SEM) at 1, 2, and 4?weeks after implantation, respectively. Results The best regeneration and configuration of the endothelium tissue and the most similar morphology to that of natural endangium was observed qualitatively in the AHCC scaffolds. The BP scaffolds had qualitatively the worst regeneration and configuration and the most dissimilar morphology at the same time point. In the AHCC group, cells could adhere directly on the inner surface of the vascular scaffolds, eliminating the time delay via the NSSC method prior to cell adhesion. Conclusion AHCC are an effective method for seeding cells on vascular scaffolds and can eliminate the time delay for cell adhesion. ? 2016 Wiley Periodicals, Inc. J Biomed Mater Res Part B: Appl Biomater, 105B: 2443–2454, 2017.
机译:摘要本研究的目的是探讨应用于人工血管支架上的创新性细胞播种技术。方法通过静电纺丝聚己内酯(PCL)制造支架,并用从脂肪衍生的干细胞分化的大鼠内皮祖细胞接种。然后,我们通过使用藻酸盐水凝胶凝集细胞(AHCC),空白藻酸盐水凝胶涂层(BAHC)和天然沉降播种细胞(NSSC)来修改PCL支架。没有任何修饰的空白PCL(BP)支架被认为是空白对照组。修饰后,在大鼠模型中植入支架。使用组织学和免疫组化方法和扫描电子显微镜(SEM)分别在1,2和4℃下扫描植入的支架并观察到植入的支架。结果在AHCC支架中定性观察到内皮组织的最佳再生和最佳形态与天然止血的最佳形态。 BP支架在同一时间点的最严重的再生和配置以及最不相似的形态。在AHCC组中,细胞可以直接粘附在血管支架的内表面上,在细胞粘附之前通过NSSC方法消除时间延迟。结论AHCC是血管支架上播种细胞的有效方法,可以消除细胞粘附的时间延迟。还2016 Wiley期刊,Inc。J生物保解率B:Appl Biomater,105B:2443-2454,2017。

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