• 文献标题:   Directed Neural Stem Cell Differentiation with a Functionalized Graphene Oxide Nanocomposite
  • 文献类型:   Article
  • 作  者:   WEAVER CL, CUI XT
  • 作者关键词:   graphene oxide, conducting polymer, neural stem cell, surface functionalization, neural biomaterial
  • 出版物名称:   ADVANCED HEALTHCARE MATERIALS
  • ISSN:   2192-2640 EI 2192-2659
  • 通讯作者地址:   Univ Pittsburgh
  • 被引频次:   42
  • DOI:   10.1002/adhm.201500056
  • 出版年:   2015

▎ 摘  要

Neural stem cell (NSC) transplantation has the potential to restore function to diseased or damaged nervous tissue, but poor control over cell survival, differentiation, and maturation limits therapeutic prospects. Engineered scaffolds that have the ability to drive neural stem cell behavior can address these limitations facing cell transplantation. Conducting polymers, which have the ability to electrically interface with cells, are attractive scaffolding candidates, but they lack the capacity for simple covalent modification, which would enable surface patterning of biomolecules. In this work, the NSC scaffolding performance of a nanocomposite composed of conducting polymer poly(3,4-ethylenedioxythiophene) (PEDOT) and graphene oxide (GO) nanosheets (GO/PEDOT) is investigated. The GO/PEDOT material is nontoxic and improves NSC differentiation toward the neuronal lineage. Biomolecules interferon- (IFN) and platelet-derived growth factor (PDGF) that selectively promote neuronal or oligodendrocyte lineage differentiation, respectively, are covalently cross-linked to the surface of the GO/PEDOT nanocomposite via carboxylic acid functional groups provided by GO using carbodiimide chemistry. The surfaces support a larger population of neurons when modified with IFN and a larger population of oligodendrocytes when modified by PDGF. This work demonstrates the customizability of GO/PEDOT for cell scaffolding applications and underlines its potential for controlling NSC behavior to improve therapeutic potential.