Peptide nanostructures on nanofibers for peripheral nerve regeneration

Manasa Nune, Anuradha Subramanian, Uma Maheswari Krishnan, Swaminathan Sethuraman

Research output: Contribution to journalArticle

Abstract

Self-assembled peptide nanofibrous scaffolds with designer sequences, similar to neurite growth promoting molecules enhance the differentiation of neural stem cells. However, self-assembled peptide nanofibrous scaffolds lack the required mechanical strength to suffice to bridge long critical-sized peripheral nerve defects. Hence, there is a demand for a potential neural substrate, which could be biomimetic coupled with bioactive nanostructures to regrow the denuded axons towards the distal end. In the present study, we developed designer self-assembling peptide-based aligned poly(lactic-co-glycolic acid) (PLGA) nanofibrous scaffolds by simple surface coating of peptides or coelectrospinning. Retention of secondary structures of peptides in peptide-coated and cospun fibers was confirmed by circular dichroism spectroscopy. The rod-like peptide nanostructures enhance the typical bipolar morphology of Schwann cells. Although the peptide-coated PLGA scaffolds exhibited significant increase in Schwann cell proliferation than pristine PLGA and PLGA-peptide cospun scaffolds (p <.05), peptide cospun scaffolds demonstrated better cellular infiltration and significantly higher gene expression of neural cell adhesion molecule, glial fibrillary acidic protein, and peripheral myelin protein22 compared to the pristine PLGA and PLGA-peptide-coated scaffolds. Our results demonstrate the positive effects of aligned peptide coelectrospun scaffolds with biomimetic cell recognition motifs towards functional proliferation of Schwann cells. These scaffolds could subsequently repair peripheral nerve defects by augmenting axonal regeneration and functional nerve recovery.

Original languageEnglish
Pages (from-to)1059-1070
Number of pages12
JournalJournal of Tissue Engineering and Regenerative Medicine
Volume13
Issue number6
DOIs
Publication statusPublished - 01-06-2019

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Nanofibers
Nerve Regeneration
Nanostructures
Peripheral Nerves
Peptides
Scaffolds (biology)
Scaffolds
Acids
Schwann Cells
Biomimetics
Cells
Circular dichroism spectroscopy
Neural Cell Adhesion Molecules
Defects
Molecules
Neural Stem Cells
Glial Fibrillary Acidic Protein
Cell adhesion
Cell proliferation
Neurites

All Science Journal Classification (ASJC) codes

  • Medicine (miscellaneous)
  • Biomaterials
  • Biomedical Engineering

Cite this

Nune, Manasa ; Subramanian, Anuradha ; Krishnan, Uma Maheswari ; Sethuraman, Swaminathan. / Peptide nanostructures on nanofibers for peripheral nerve regeneration. In: Journal of Tissue Engineering and Regenerative Medicine. 2019 ; Vol. 13, No. 6. pp. 1059-1070.
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Peptide nanostructures on nanofibers for peripheral nerve regeneration. / Nune, Manasa; Subramanian, Anuradha; Krishnan, Uma Maheswari; Sethuraman, Swaminathan.

In: Journal of Tissue Engineering and Regenerative Medicine, Vol. 13, No. 6, 01.06.2019, p. 1059-1070.

Research output: Contribution to journalArticle

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