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Effect of functionalized micropatterned PLGA on guided neurite growth.

机译:功能化的微图案PLGA对神经突生长的影响。

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摘要

When coaptation is not possible in the repair of nerve injuries, a bridge of biomaterial scaffold provides a structural support for neuronal cell growth and guides nerve regeneration. Poly(lactide-co-glycolide) (PLGA) scaffolds have been widely investigated for neural tissue engineering applications. In order to investigate guided neurite growth, we have fabricated micropatterns on PLGA films using laser ablation methods. The micropatterned PLGA films were coated with collagen type I or laminin peptide (PPFLMLLKGSTR) to promote axon growth. Micropatterned PLGA films provide a guidance effect on both early stage neurite outgrowth and elongation. Small (5 microm) grooves showed more statistically significant parallel neurite growth compared with larger size grooves (10 microm). Micropatterned PLGA films coated with laminin peptide showed more parallel neurite growth compared with those coated with collagen type I. Primary neurite number and total neurite length per cell decreased on micropatterned PLGA films compared with the controls. Neurites showed a preference for growth in the microgrooves rather than on the spaces. This study indicates that surface micropatterned structures with conjugated functional molecules can be used to guide neurite growth.
机译:当无法在神经损伤的修复中进行适应时,生物材料支架的桥梁将为神经元细胞的生长提供结构支持,并指导神经再生。聚(丙交酯-共-乙交酯)(PLGA)支架已被广泛研究用于神经组织工程应用。为了研究引导的神经突生长,我们使用激光烧蚀方法在PLGA膜上制作了微图案。微图案化的PLGA薄膜涂有I型胶原蛋白或层粘连蛋白肽(PPFLMLLKGSTR),以促进轴突生长。微图案化的PLGA膜对早期神经突的生长和伸长均具有指导作用。与较大尺寸的凹槽(10微米)相比,较小的凹槽(5微米)显示出更显着的平行神经突生长。层粘连蛋白肽包被的微图案PLGA膜与I型胶原包被的膜相比显示出更多的平行神经突生长。与对照组相比,微图案PLGA膜上的初级神经突数目和每个细胞的总神经突长度减少。神经突表现出对微沟槽而不是空隙中生长的偏好。该研究表明具有共轭功能分子的表面微图案结构可用于指导神经突生长。

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