当前位置: X-MOL 学术Int. J. Biol. Macromol. › 论文详情
Our official English website, www.x-mol.net, welcomes your feedback! (Note: you will need to create a separate account there.)
Fabrication of heparinized bi-layered vascular graft with PCL/PU/gelatin co-electrospun and chitosan/silk fibroin/gelatin freeze-dried hydrogel for improved endothelialization and enhanced mechanical properties
International Journal of Biological Macromolecules ( IF 7.7 ) Pub Date : 2023-09-09 , DOI: 10.1016/j.ijbiomac.2023.126807
Aram Almasi-Jaf 1 , Amir Shamloo 1 , Hossein Shaygani 1 , Saeed Seifi 1
Affiliation  

Fabricating a biocompatible small-diameter vascular graft (< 6 mm) with mechanical properties similar to the natural vein and adding good anti-thrombogenic, endothelialization, and hyperplasia properties remains a challenge. To this end, we fabricated a heparinized bilayer graft to address this problem. The proposed bilayer sample consisted of a heparinized polycaprolactone (PCL), polyurethane (PU), and gelatin (G) co-electrospun inner layer and chitosan, gelatin, and silk fibroin freeze-dried hydrogel crosslinked with 1-ethyl-3-(3-dimethylaminopropyl) carbodiimide (EDC) and N-hydroxysuccinimide (NHS) outer layer. The samples exhibited great ultimate stress, Young's module, and suture retention of 4.16±0.25MPa, 8.24±2.59MPa and 4.83±0.31N, respectively. The heparin release assay indicated a sustained release profile of around 70% after 4weeks, which can be attributed to the excellent control via emulsion. Furthermore, the heparinized samples demonstrated good anti-thrombogenic properties investigated in the platelet adhesion assay. For the outer layer, the hydrogel crosslinked with non-toxic materials was prepared through the freeze-drying method to achieve high porosity (64.63%), suitable for smooth muscle cell activity. Moreover, inner and outer layers showed high cell viability toward endothelial (78.96%) and smooth muscle cells (57.77%), respectively. Overall, the proposed heparinized graft exhibited excellent potential for vascular graft regeneration.

中文翻译:


用 PCL/PU/明胶共静电纺丝和壳聚糖/丝素蛋白/明胶冻干水凝胶制备肝素化双层血管移植物,以改善内皮化和增强机械性能



制造具有与自然静脉相似机械性能的生物相容性小直径血管移植物 (< 6 mm) 并增加良好的抗血栓形成、内皮化和增生性能仍然是一项挑战。为此,我们制造了一种肝素化双层移植物来解决这个问题。拟议的双层样品由肝素化聚己内酯 (PCL)、聚氨酯 (PU) 和明胶 (G) 共静电纺丝内层以及与 1-乙基-3-(3-二甲基氨基丙基)碳二亚胺 (EDC) 和 N-羟基琥珀酰亚胺 (NHS) 外层交联的壳聚糖、明胶和丝素蛋白冻干水凝胶组成。样品表现出较大的极限应力、杨氏模量和缝合保持力,分别为 4.16±0.25MPa、8.24±2.59MPa 和 4.83±0.31N。肝素释放试验表明 4 周后持续释放曲线约为 70%,这可归因于通过乳剂的良好控制。此外,在血小板粘附试验中研究的肝素化样品显示出良好的抗血栓形成特性。外层采用冷冻干燥法制备与无毒物质交联的水凝胶,达到高孔隙率 (64.63%),适合平滑肌细胞活性。此外,内层和外层分别对内皮细胞 (78.96%) 和平滑肌细胞 (57.77%) 表现出较高的细胞活力。总体而言,所提出的肝素化移植物表现出极好的血管移植物再生潜力。
更新日期:2023-09-09
down
wechat
bug