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首页> 外文期刊>Biomaterials >The in vivo stability of electrospun polycaprolactone-collagen scaffolds in vascular reconstruction.
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The in vivo stability of electrospun polycaprolactone-collagen scaffolds in vascular reconstruction.

机译:电纺聚己内酯-胶原蛋白支架在血管重建中的体内稳定性。

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摘要

To avoid complications of prosthetic vascular grafts, engineered vascular constructs have been investigated as an alternative for vascular reconstruction. The scaffolds for vascular tissue engineering remain a cornerstone of these efforts and yet many currently available options are limited by issues of inconsistency, poor adherence of vascular cells, or inadequate biomechanical properties. In this study, we investigated whether PCL/collagen scaffolds could support cell growth and withstand physiologic conditions while maintaining patency in a rabbit aortoiliac bypass model. Our results indicate that electrospun scaffolds support adherence and growth of vascular cells under physiologic conditions and that endothelialized grafts resisted adherence of platelets when exposed to blood. When implanted in vivo, these scaffolds were able to retain their structural integrity over 1 month of implantation as demonstrated by serial ultrasonography. Further, at retrieval, these scaffolds continued to maintain biomechanical strength that was comparable to native artery. This study suggests that electrospun scaffolds combined with vascular cells may become an alternative to prosthetic vascular grafts for vascular reconstruction.
机译:为了避免人工血管移植物的并发症,已经研究了工程化的血管结构作为血管重建的替代方法。用于血管组织工程的支架仍然是这些努力的基石,然而许多当前可用的选择受到不一致,血管细胞粘附性差或生物力学特性不足的问题的限制。在这项研究中,我们调查了PCL /胶原蛋白支架是否可以支持细胞生长并承受生理条件,同时在兔主动脉旁路模型中保持通畅。我们的结果表明,电纺支架在生理条件下支持血管细胞的粘附和生长,而内皮移植的移植物在暴露于血液时可抵抗血小板的粘附。当在体内植入时,这些支架能够在植入的1个月内保持其结构完整性,这是通过系列超声检查证实的。此外,在取回时,这些支架继续保持与天然动脉相当的生物力学强度。这项研究表明,电纺支架与血管细胞的结合可能会替代人工血管移植物以进行血管重建。

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