Novel Silk Fibroin Based Bilayer Scaffolds for Bioabsorbable Internal Biliary Stenting.

Area of Science:

• Biomaterials Science
• Regenerative Medicine
• Surgical Innovation

Background:

• Biliary duct reconstruction is a critical yet complex procedure in liver transplantation, responsible for 40%-60% of post-operative complications.
• Current synthetic biliary stents necessitate secondary removal, increasing patient risk and healthcare expenditure.

Purpose of the Study:

• To develop a novel fabrication technique for a bioabsorbable biliary stent using silk fibroin.
• To create a stent that avoids the need for reintervention for removal, thereby reducing patient morbidity and healthcare costs.

Main Methods:

• A dip-coating technique was employed for silk fibroin to create smooth, monolayer tubular specimens.
• Electrospinning was utilized to deposit an outer layer of electrospun silk fibroin, forming bilayer structures.
• Mechanical, morphological, and cytocompatibility properties were assessed.

Main Results:

• The fabricated silk fibroin structures exhibited promising mechanical, morphological, and cytocompatibility characteristics.
• The dip-coating and electrospinning technique proved reproducible, suitable for potential large-scale production.
• The developed stent is completely bioabsorbable, negating the need for a second surgical intervention.

Conclusions:

• A novel, reproducible fabrication method for bioabsorbable silk fibroin biliary stents has been established.
• These stents show potential for clinical application in liver transplantation, offering a safer and more cost-effective alternative to synthetic stents.
• Further in vitro and in vivo studies are warranted to validate the clinical suitability of these silk fibroin biliary stents.