首页> 外文会议>Advances in structures, properties and applications of biological and bioinspired materials >A Novel Injectable Chitosan Sponge Containing Brain Derived Neurotrophic Factor (BDNF) to Enhance Human Oligodendrocyte Progenitor Cells' (OPC) Differentiation
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A Novel Injectable Chitosan Sponge Containing Brain Derived Neurotrophic Factor (BDNF) to Enhance Human Oligodendrocyte Progenitor Cells' (OPC) Differentiation

机译:新型的含有脑源性神经营养因子(BDNF)的注射用壳聚糖海绵增强人少突胶质祖细胞(OPC)的分化。

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We developed a rapidly-gelling chitosan sponge crosslinked with Guanosine 5'-Diphosphate (GDP). GDP has not been previously explored as an anionic crosslinker, and it was used in this application since the nucleoside guanosine has been shown to improve remyelination in situ, and thus its presence in the sponge composition was hypothesized to induce Oligodendrocyte Progenitor Cells' (OPC) differentiation. In addition to the chemical composition tailored to target OPCs, the developed chitosan sponge possesses a wide range of desirable physicochemical properties such as: rapid gelation, high porosity with interconnected pores, moduli of elasticity resembling that of soft tissue and cytocompatibility with many cell types. Moreover, protein encapsulation into the sponges was possible with high encapsulation efficiencies (e.g. BMP-7 and NT-3). In this study, BDNF was encapsulated in the chitosan sponges with an encapsulation efficiency greater than 80% and a sustained release over a 16-day period was achieved. We demonstrate here for the first time, the attachment of human fetal OPCs to the sponges and their differentiation after 12 days of culture. Overall, this newly-introduced injectable sponge is a promising therapeutic modality that can be used to enhance remyelination post-spinal cord injuries.
机译:我们开发了与鸟苷5'-二磷酸酯(GDP)交联的快速凝胶化壳聚糖海绵。 GDP以前尚未被开发为阴离子交联剂,并且已被用于该应用中,因为已证明核苷鸟苷可改善原位的髓鞘再生,因此推测其在海绵组合物中的存在可诱导少突胶质祖细胞(OPC)。差异化。除了针对目标OPC定制的化学成分外,开发的壳聚糖海绵还具有广泛的理想理化特性,例如:快速凝胶化,具有连通孔的高孔隙率,类似于软组织的弹性模量以及与许多细胞类型的细胞相容性。此外,可以以高的包封效率(例如,BMP-7和NT-3)将蛋白包封到海绵中。在这项研究中,BDNF被封装在壳聚糖海绵中,其封装效率大于80%,并在16天的时间内实现了持续释放。我们首次在这里展示了人类胎儿OPC在海绵上的附着及其在培养12天后的分化。总体而言,这种新推出的可注射海绵是一种很有前途的治疗方式,可用于增强脊髓脊髓损伤后的髓鞘再生。

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