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Culture of neural stem cells on conductive and microgrooved polymeric scaffolds fabricated via electrospun fiber-template lithography

Authors
 Madhumita Patel  ;  Ji Hong Min  ;  Min-Ho Hong  ;  Hyo-Jung Lee  ;  Seungmin Kang  ;  Seong Yi  ;  Won-Gun Koh 
Citation
 BIOMEDICAL MATERIALS, Vol.15(4) : 045007, 2020-07 
Journal Title
 BIOMEDICAL MATERIALS 
ISSN
 1748-6041 
Issue Date
2020-07
Abstract
We developed polymeric scaffolds that can provide both topographical and electrical stimuli on mouse neural stem cells (mNSCs) for potential use in nerve tissue engineering. In contrast to conventional patterning techniques such as imprinting, soft/photolithography, and three-dimensional printing, microgroove patterns were generated by using aligned electrospun fibers as templates, via a process denoted as electrospun fiber-template lithography. The preparation of polyvinylpyrrolidone fibers, followed by the deposition of poly(lactic-co-glycolic acid) (PLGA) and the removal of the fiber template, produced freestanding PLGA scaffolds with microgrooves having widths of 1.72 ± 0.24 μm. The subsequent deposition of polypyrrole (PPy) via chemical oxidative polymerization added conductivity to the microgrooved PLGA scaffolds. The resultant scaffolds were cytocompatible with mNSCs. The microgroove patterns enhanced the alignment and elongation of mNSCs, and the PPy layer promoted the interaction of cells with the surface by forming more and longer filopodia compared with the nonconductive surface. Finally, the neuron differentiation of mNSCs was evaluated by monitoring the Tuj-1 neuronal gene expression. The presence of both microgrooves and the conductive PPy layer enhanced the neuronal differentiation of mNSCs even without electrical stimulation, and the neuronal differentiation was further enhanced by stimulation with a sufficient electrical pulse (1.0 V).
Full Text
https://iopscience.iop.org/article/10.1088/1748-605X/ab763b
DOI
10.1088/1748-605X/ab763b
Appears in Collections:
1. College of Medicine (의과대학) > Dept. of Neurosurgery (신경외과학교실) > 1. Journal Papers
Yonsei Authors
Yi, Seong(이성)
URI
https://ir.ymlib.yonsei.ac.kr/handle/22282913/179597
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