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Directional Submicrofiber Hydrogel Composite Scaffolds Supporting Neuron Differentiation and Enabling Neurite
Lena Mungenast1, Fabian Züger2, Jasmin Selvi2
1Institute for Chemistry and Bioanalytics, University of Applied Sciences FHNW, Hofackerstrasse 30, 4132 Muttenz, Switzerland.
International Journal of Molecular Sciences
|October 14, 2022
Summary
This study developed a cost-effective gelatin hydrogel scaffold with aligned fibers to guide neural stem cell growth. The optimized scaffold promotes neuron attachment, proliferation, and alignment for neural tissue engineering.
Area of Science:
- Biomaterials Science
- Tissue Engineering
- Neuroscience
Background:
- Scaffolds are crucial for tissue regeneration, requiring specific mechanical properties to support cell functions.
- Anisotropic scaffolds can mimic neural tissue structure and guide neural progenitor cell behavior.
Purpose of the Study:
- To develop a cost-efficient, patterned hydrogel-fiber composite scaffold for neural tissue engineering.
- To tune scaffold stiffness and incorporate alignment cues for enhanced neuron growth and differentiation.
Main Methods:
- Fabrication of enzymatically crosslinked gelatin hydrogels with tunable stiffness (8-80 kPa).
- Electrospinning of poly(ε-caprolactone) (PCL) fibers onto hydrogels to create aligned cues.
- Culturing human neural progenitor cells on the composite scaffolds.
Main Results:
- Hydrogel-fiber composites with a modulus of ~20 kPa demonstrated optimal cell attachment and proliferation.
- Differentiated neurons successfully aligned and bundled neurites along the PCL fibers.
- The scaffold supports differentiation, alignment, and bundling of neurons, a unique observation for this cell type.
Conclusions:
- A novel, cost-effective gelatin-based hydrogel-fiber composite scaffold was successfully developed.
- The scaffold effectively supports human neural progenitor cell attachment, proliferation, differentiation, and alignment.
- This technology is promising for neural tissue engineering applications requiring directed neuron growth, such as spinal cord repair.
