首页> 外文期刊>Acta biomaterialia >Impact of co-incorporating laminin peptide dopants and neurotrophic growth factors on conducting polymer properties.
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Impact of co-incorporating laminin peptide dopants and neurotrophic growth factors on conducting polymer properties.

机译:共掺入层粘连蛋白肽掺杂剂和神经营养生长因子对传导聚合物性能的影响。

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摘要

Conductive neural interfaces tailored for cell interaction by incorporation of bioactive factors are hypothesized to produce superior neuroprostheses with improved charge transfer capabilities. This study examined the effect of entrapping nerve growth factor (NGF) within the conducting polymer poly(ethylene dioxythiophene) (PEDOT) during electrodeposition to create a polymer capable of stimulating neurite outgrowth from proximal neural tissue. NGF entrapment was performed on polymers doped with laminin peptides DEDEDYFQRYLI and DCDPGYIGSR and, additionally, a conventional dopant, paratoluene sulphonate (pTS). All polymer coatings were analysed for a range of physical, electrical and mechanical properties, with the biological activity of ligands examined using a PC12 neurite outgrowth assay. NGF was successfully entrapped in PEDOT during electrodeposition and was shown to produce a softer interface than conventional conducting polymers and films without the NGF modification. However, it was found that the use of a peptide dopant combined with NGF entrapment resulted in polymers with diminished electrical and mechanical stability. Entrapped NGF was determined to be biologically active, with PEDOT/pTS/NGF producing neurite outgrowth comparable with control films where NGF was supplied via the medium. Future studies will determine the effect of typical neural prosthetic stimulation regimes on the release of neurotrophins and subsequent cell response.
机译:假设通过结合生物活性因子为细胞相互作用量身定制的传导性神经界面可产生具有改善的电荷转移能力的卓越神经假体。这项研究检查了在电沉积​​过程中在导电聚合物聚(乙烯二氧噻吩)(PEDOT)中包裹神经生长因子(NGF)的作用,以创建一种能够刺激神经突从近端神经组织长出的聚合物。对掺有层粘连蛋白肽DEDEDYFQRYLI和DCDPGYIGSR以及常规掺杂剂对甲苯磺酸盐(pTS)的聚合物进行NGF截留。分析所有聚合物涂层的一系列物理,电气和机械性能,并使用PC12神经突生长测定法检查配体的生物活性。在电沉积过程中,NGF已成功地包裹在PEDOT中,并且与传统的导电聚合物和未经NGF修饰的薄膜相比,其界面更柔软。然而,发现结合使用肽掺杂剂和NGF截留会导致聚合物的电和机械稳定性降低。所捕获的NGF被确定为具有生物活性,PEDOT / pTS / NGF产生的神经突向外生长,与通过介质供应NGF的对照膜相当。未来的研究将确定典型的神经修复刺激方案对神经营养蛋白释放和随后的细胞反应的影响。

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