Magnetic fields enable precise spatial control over electrospun fiber alignment for fabricating complex gradient...

Area of Science:

• Biomaterials Science
• Tissue Engineering
• Regenerative Medicine

Background:

• Musculoskeletal interfacial tissues exhibit complex structural and signaling gradients crucial for function.
• Mimicking these native gradients in tissue engineering scaffolds remains a significant challenge.
• Precise spatial control over fiber alignment is needed to replicate interfacial tissue structures.

Purpose of the Study:

• To develop a novel fabrication technique for creating spatially controlled fiber alignment gradients.
• To engineer fibrous scaffolds that mimic the structural gradients found in musculoskeletal interfacial tissues.
• To assess the potential of these scaffolds for regenerating functional tissues.

Main Methods:

• Utilized magnetically-assisted electrospinning to achieve controlled fiber alignment.
• Demonstrated spatial control over fiber alignment at sub-millimeter resolution.
• Fabricated gradient fibrous scaffolds using various polymers and magnet configurations.

Main Results:

• Magnetically-assisted electrospinning produced highly aligned fibers in magnetic fields, transitioning to random alignment.
• The technique enabled precise, gradient control over fiber alignment along the scaffold length.
• Cells seeded on gradient scaffolds showed alignment on aligned fibers and random distribution on random fibers.

Conclusions:

• Magnetically-assisted electrospinning offers a versatile modular approach for fabricating gradient fibrous materials.
• These gradient scaffolds show promise for tissue engineering applications, particularly for musculoskeletal interfacial tissues.
• This method represents a significant advancement in creating biomimetic scaffolds for tissue regeneration.