Engineering PCL/lignin nanofibers as an antioxidant scaffold for the growth of neuron and Schwann cell

Jing Wang, Lingling Tian, Baiwen Luo, Seeram Ramakrishna, Dan Kai, Xian Jun Loh, In Hong Yang, G. Roshan Deen, Xiumei Mo

Research output: Contribution to journalArticle

Abstract

Antioxidant is critical for the successful of nerve tissue regeneration, and biomaterials with antioxidant activity might be favorable for peripheral nerve repair. Lignin, a biopolymer from wood with excellent antioxidant properties, is still “unexplored” as biomaterials. To design an antioxidative bioscaffold for nerve regeneration, here we synthesized lignin-polycaprolactone (PCL) copolymers via solvent free ring-opening polymerization (ROP). Then such lignin-PCL copolymers were incorporated with PCL and engineered into nanofibrous scaffolds for supporting the growth of neuron and Schwann cell. Our results showed that the addition of lignin-PCL enhanced the mechanical properties of PCL nanofibers and endowed them with good antioxidant properties (up to 98.3 ± 1.9% free radical inhibition within 4 h). Cell proliferation assay showed that PCL/lignin-PCL nanofibers increased cell viability compared to PCL fibers, especially after an oxidative challenge. Moreover, Schwann cells and dorsal root ganglion (DRG) neurons cultured on the nanofibers to assess their potential for nerve regeneration. These results suggested that nanofibers with lignin copolymers promoted cell proliferation of both BMSCs and Schwann cells, enhanced myelin basic protein expressions of Schwann cells and stimulated neurite outgrowth of DRG neurons. In all, these sustainable, intrinsically antioxidant nanofibers may be a potential candidate for nerve TE applications.

Original languageEnglish (US)
Pages (from-to)356-365
Number of pages10
JournalColloids and Surfaces B: Biointerfaces
Volume169
DOIs
StatePublished - Sep 1 2018
Externally publishedYes

Keywords

  • Electrospinning
  • Lignin
  • Neuron
  • Ring-opening polymerization
  • Schwann cell

ASJC Scopus subject areas

  • Biotechnology
  • Surfaces and Interfaces
  • Physical and Theoretical Chemistry
  • Colloid and Surface Chemistry

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  • Cite this

    Wang, J., Tian, L., Luo, B., Ramakrishna, S., Kai, D., Loh, X. J., Yang, I. H., Deen, G. R., & Mo, X. (2018). Engineering PCL/lignin nanofibers as an antioxidant scaffold for the growth of neuron and Schwann cell. Colloids and Surfaces B: Biointerfaces, 169, 356-365. https://doi.org/10.1016/j.colsurfb.2018.05.021