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Bioactive hydrogel-filament scaffolds for nerve repair and regeneration
K D Newman1, C R McLaughlin, D Carlsson
1University of Ottawa Eye Institute, Ottawa Hospital, General Campus, Ottawa, Ontario, Canada.
The International Journal of Artificial Organs
|December 13, 2006
Summary
Incorporating fibers into collagen-terpolymer scaffolds significantly enhanced nerve regeneration and neurite extension. These novel biosynthetic scaffolds show promise for peripheral nerve repair and tissue engineering applications.
Area of Science:
- Biomaterials Science
- Tissue Engineering
- Neuroscience
Background:
- Novel biomaterials are essential for advancing tissue engineering in nerve regeneration.
- Collagen-terpolymer (collagen-TERP) scaffolds, previously successful in corneal repair, were investigated for nerve growth.
- The laminin pentapeptide YIGSR was grafted onto scaffolds to promote nerve regeneration.
Purpose of the Study:
- To enhance neuronal growth on collagen-TERP scaffolds by incorporating supporting fibers.
- To evaluate the effect of fiber incorporation on neurite extension, morphology, and function.
- To assess the potential of these modified scaffolds as conduits for peripheral nerve repair.
Main Methods:
- Development and evaluation of novel biosynthetic scaffolds: collagen crosslinked with poly(N-isopropylacrylamide) (PNiPAAm) terpolymer.
- In vitro assessment of neuronal growth using isolated dorsal root ganglia on collagen-TERP scaffolds with and without incorporated fibers.
- Statistical analysis using one-way ANOVA to determine significance.
Main Results:
- Fiber incorporation into collagen-TERP scaffolds significantly increased neurite extension (p<0.05).
- Neurite growth habit varied with fiber type, showing directional growth along certain fibers.
- Fibers influenced neurite morphology and function, with increased Na channel expression observed.
Conclusions:
- Incorporation of supporting fibers enhances neurite outgrowth on collagen-TERP scaffolds.
- Scaffold surface properties are critical for promoting and guiding nerve regeneration.
- Tissue-engineered collagen-TERP hybrid scaffolds hold significant potential as conduits for peripheral nerve repair.
