Protein papers from microfibrillated silk for biomedical membrane applications.

Area of Science:

• Biomaterials Science
• Tissue Engineering
• Regenerative Medicine

Background:

• Microfibrillated silk (MFS) offers a novel top-down approach to silk material processing.
• MFS presents potential for advanced biomaterials in tissue engineering and regenerative medicine.

Purpose of the Study:

• To investigate the impact of processing and fabrication on MFS properties.
• To evaluate cellular responses to MFS papers produced via different methods.

Main Methods:

• Produced MFS suspensions with varying fibrillation levels using mechanical processing and acid pre-treatment.
• Fabricated MFS papers using scalable casting and vacuum filtration methods.
• Analyzed fibre morphology, mechanical strength, surface roughness, and cell attachment.

Main Results:

• Fibrillation level significantly influenced MFS morphology and strength; mechanical processing alone yielded the strongest papers.
• Casting produced papers with distinct top and bottom surface roughness, while vacuum filtration resulted in uniform roughness.
• Surface characteristics and fibrillation degree affected cell attachment and organization, with specific cast MFS papers showing superior biological outcomes.

Conclusions:

• Controlling MFS processing and fabrication is key to tailoring silk-based materials for biomedical applications.
• The study demonstrates a pathway for designing customized silk biomaterials for tissue engineering by optimizing MFS production and assembly.