Touch-Spun Nanofibers for Nerve Regeneration

Area of Science:

• Biomaterials Science
• Regenerative Medicine
• Neuroscience

Background:

• Neural stem cells (NSCs) are crucial for nerve repair.
• Polycaprolactone (PCL) nanofibers are investigated for neural tissue engineering.
• Scaffold properties significantly influence neural cell behavior.

Purpose of the Study:

• To evaluate the potential of aligned touch-spun PCL nanofibers for NSC proliferation and differentiation.
• To compare the effects of touch-spun PCL with electrospun PCL on NSC behavior.
• To assess the structural and mechanical properties of the PCL nanofibers.

Main Methods:

• Neural stem cells (NSCs) cultured on aligned touch-spun and electrospun PCL nanofibers.
• Confocal microscopy for cell growth and differentiation assessment.
• Neurite quantification and X-ray diffraction for structural analysis.

Main Results:

• NSCs grew and differentiated on both scaffold types up to 8 days.
• Touch-spun PCL with bovine serum albumin promoted neuron-specific β-tubulin expression.
• NSCs on touch-spun fibers showed bipolar elongation, while those on electrospun fibers showed multipolar elongation.
• Touch-spun PCL nanofibers exhibited higher crystallinity and elastic modulus than electrospun PCL.

Conclusions:

• Aligned touch-spun PCL nanofibrous scaffolds support NSC differentiation and directed growth.
• The enhanced structural properties of touch-spun PCL contribute to improved NSC response.
• These findings suggest touch-spun PCL nanofibrous scaffolds are promising for nerve injury repair applications.