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A Protein Composite Neural Scaffold Modulates Astrocyte Migration and Transcriptome Profile.

Li Yao1,2, Ryan Brice1,2, Teresa Shippy1,2

  • 1Department of Biological Sciences, Wichita State University, 1845 Fairmount Street, Wichita, KS, 67260, USA.

Macromolecular Bioscience
|January 11, 2022
PubMed
Summary

A novel glutenin-collagen bioscaffold enhances astrocyte migration and reduces glial scar formation, promoting neural regeneration after injury. This biomaterial shows promise for improving functional recovery in spinal cord and peripheral nerve repair.

Keywords:
astrocytecell motilitychondroitin sulfate proteoglycansgluteninneural scaffolds

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Area of Science:

  • Biomaterials Science
  • Neuroscience
  • Tissue Engineering

Background:

  • Bioscaffold implantation aids neural tissue repair but yields limited functional recovery.
  • Astrocytes migrate to injury sites, remodeling neural tissue post-injury.
  • Glial scar formation by astrocytes inhibits neural regeneration.

Purpose of the Study:

  • To develop and evaluate a novel glutenin-collagen bioscaffold for neural tissue regeneration.
  • To investigate the effect of glutenin-collagen scaffolds on human astrocyte behavior and gene expression.
  • To assess the potential of this bioscaffold in promoting neural repair by modulating astrocyte activity.

Main Methods:

  • Fabrication of glutenin-collagen and collagen-only scaffolds.
  • Culturing human astrocytes on the developed scaffolds.
  • Assessing astrocyte motility, proliferation, and gene expression via RNA sequencing.
  • Analysis of differentially expressed genes in KEGG pathways related to cell migration and adhesion.

Main Results:

  • Human astrocytes exhibited higher motility and lower proliferation on glutenin-collagen scaffolds compared to collagen scaffolds.
  • RNA sequencing identified differential gene expression in pathways regulating astrocyte migration (actin cytoskeleton, focal adhesion).
  • Expression of chondroitin sulfate proteoglycans (aggrecan, versican), which inhibit axonal growth, was downregulated on glutenin-collagen scaffolds.

Conclusions:

  • Glutenin-collagen bioscaffolds enhance astrocyte migration, a crucial step in neural tissue remodeling.
  • These scaffolds reduce the expression of axonal growth inhibitors, potentially mitigating glial scar formation.
  • Glutenin-collagen scaffolds show potential for promoting neural regeneration and improving functional recovery after nerve injury.