透明质酸掺杂聚(3,4-亚乙基二氧噻吩)/壳聚糖/明胶(PEDOT-HA/Cs/Gel)多孔导电支架用于神经再生。

Hyaluronic acid doped-poly(3,4-ethylenedioxythiophene)/chitosan/gelatin (PEDOT-HA/Cs/Gel) porous conductive scaffold for nerve regeneration.

机构信息

Dalian R&D Center for Stem Cell and Tissue Engineering, Dalian University of Technology, Dalian 116024, P.R. China.

Dalian R&D Center for Stem Cell and Tissue Engineering, Dalian University of Technology, Dalian 116024, P.R. China.

出版信息

Mater Sci Eng C Mater Biol Appl. 2017 Feb 1;71:308-316. doi: 10.1016/j.msec.2016.10.029. Epub 2016 Oct 17.

Abstract

Conducting polymer, as a "smart" biomaterial, has been increasingly used to construct tissue engineered scaffold for nerve tissue regeneration. In this study, a novel porous conductive scaffold was prepared by incorporating conductive hyaluronic acid (HA) doped-poly(3,4-ethylenedioxythiophene) (PEDOT-HA) nanoparticles into a chitosan/gelatin (Cs/Gel) matrix. The physicochemical characteristics of Cs/Gel scaffold with 0-10wt% PEDOT-HA were analyzed and the results indicated that the incorporation of PEDOT-HA into scaffold increased the electrical and mechanical properties while decreasing the porosity and water absorption. Moreover, in vitro biodegradation of scaffold displayed a declining trend with the PEDOT-HA content increased. About the biocompatibility of conductive scaffold, neuron-like rat phaeochromocytoma (PC12) cells were cultured in scaffold to evaluate cell adhesion and growth. 8% PEDOT-HA/Cs/Gel scaffold had a higher cell adhesive efficiency and cell viability than the other conductive scaffolds. Furthermore, cells in the scaffold with 8wt% PEDOT-HA expressed higher synapse growth gene of GAP43 and SYP compared with Cs/Gel control group. These results suggest that 8%PEDOT-HA/Cs/Gel scaffold is an attractive cell culture conductive substrate which could support cell adhesion, survival, proliferation, and synapse growth for the application in nerve tissue regeneration.

摘要

导电聚合物作为一种“智能”生物材料,已越来越多地用于构建用于神经组织再生的组织工程支架。在这项研究中,通过将导电透明质酸(HA)掺杂的聚(3,4-亚乙基二氧噻吩)(PEDOT-HA)纳米颗粒掺入壳聚糖/明胶(Cs/Gel)基质中,制备了一种新型多孔导电支架。分析了含有 0-10wt%PEDOT-HA 的 Cs/Gel 支架的物理化学特性,结果表明,PEDOT-HA 的掺入增加了支架的电和机械性能,同时降低了孔隙率和吸水率。此外,支架的体外生物降解显示出随 PEDOT-HA 含量增加而下降的趋势。关于导电支架的生物相容性,将大鼠嗜铬细胞瘤(PC12)神经元样细胞培养在支架中以评估细胞粘附和生长。与其他导电支架相比,8%PEDOT-HA/Cs/Gel 支架具有更高的细胞粘附效率和细胞活力。此外,在含有 8wt%PEDOT-HA 的支架中的细胞表达的突触生长基因 GAP43 和 SYP 高于 Cs/Gel 对照组。这些结果表明,8%PEDOT-HA/Cs/Gel 支架是一种有吸引力的细胞培养导电基底,可支持细胞粘附、存活、增殖和突触生长,可用于神经组织再生。

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