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Nanotopographic Cell Culture Substrate: Polymer-Demixed Nanotextured Films Under Cell Culture Conditions

机译:纳米形细胞培养底物:细胞培养条件下聚合物分解的纳米织构薄膜

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Modulating physical cell culture environments via nanoscale substrate topographic modification has recently been of significant interest in regenerative medicine. Many studies have utilized a polymer-demixing technique to produce nanotextured films and showed that cellular adhesion, proliferation, and differentiation could be regulated by the shape and scale of the polymer-demixed nanotopographies. However, little attention has been paid to the topographic fidelity of the polymer-demixed films when exposed to cell culture conditions. In this brief article, two polymer-demixing systems were employed to assess topographic changes in polymer-demixed films after fibronectin (FN) extracellular matrix protein adsorption and after incubation in phosphate-buffered saline at 37°C. We showed that FN adsorption induced very small variations (2?nm) to the polystyrene/polybromostyrene (PS/PBrS)-demixed nanoisland textures, not substantially altering the nanotopographies given by the polymer demixing. In addition, poly(L-lactic acid)/PS (PLLA/PS)-demixed nanoisland topographies using PLLA with M w=50×103 did not show notable degradation up to day 24.
机译:通过纳米尺度的底物形貌修饰调节物理细胞培养环境最近在再生医学中引起了极大的兴趣。许多研究已经利用聚合物脱附技术来生产纳米结构化薄膜,并表明细胞粘附,增殖和分化可以通过聚合物脱附的纳米形貌的形状和规模来调节。然而,当暴露于细胞培养条件下时,聚合物脱膜的膜的保真度很少受到关注。在这篇简短的文章中,采用了两种聚合物脱氨系统来评估纤连蛋白(FN)细胞外基质蛋白吸附后和在37°C的磷酸盐缓冲液中孵育后聚合物脱膜的形貌变化。我们表明,FN吸附对聚苯乙烯/聚溴苯乙烯(PS / PBrS)脱除的纳米岛织构引起很小的变化(<2?nm),而不会显着改变由聚合物混合得到的纳米形貌。此外,使用M w = 50×10 3 的PLLA对聚(L-乳酸)/ PS(PLLA / PS)进行了消解的纳米岛形貌没有显示出明显的降解。直到第24天。

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