Oriented Schwann cell growth on micropatterned biodegradable polymer substrates

Area of Science:

• Biomaterials Science
• Cell Biology
• Tissue Engineering

Background:

• Schwann cells are crucial for peripheral nerve regeneration.
• Controlling Schwann cell behavior in vitro is essential for developing effective nerve regeneration strategies.
• Substrate topography and chemistry play significant roles in cell guidance.

Purpose of the Study:

• To investigate the impact of substrate-mediated chemical and physical cues on Schwann cell growth and alignment.
• To develop and evaluate biodegradable polymer substrates with microgrooves and adsorbed proteins for cell culture.

Main Methods:

• Fabrication of microgrooved biodegradable polymer substrates (poly(D,L-lactic acid)) using compression molding and solvent-casting.
• Selective adsorption of laminin onto microgrooves.
• Seeding and culturing of rat sciatic Schwann cells on the fabricated substrates.

Main Results:

• Laminin significantly improved Schwann cell adhesion to the polymer substrates.
• Microgrooves induced alignment of Schwann cells along the groove direction.
• Groove width was a critical factor for Schwann cell alignment; groove depth had minimal impact.
• Solvent-cast films exhibited slower degradation compared to compression-molded films, indicating suitability for cell culture.

Conclusions:

• Biodegradable polymer substrates with microgroove topography and laminin coating provide effective physical and chemical guidance for Schwann cells.
• Microgroove width is a key parameter for controlling Schwann cell alignment.
• Solvent-cast poly(D,L-lactic acid) films with microgrooves are promising substrates for in vitro Schwann cell culture due to their stability.