A highly adhesive and naturally derived sealant

Area of Science:

• Biomaterials Science
• Regenerative Medicine
• Surgical Innovation

Background:

• Conventional surgical methods for repairing elastic tissue defects are often inadequate.
• There is a need for advanced sealants that are effective, safe, and cost-efficient.

Purpose of the Study:

• To engineer a novel, inexpensive, highly adhesive, biocompatible, and biodegradable sealant using modified gelatin methacryloyl (GelMA).
• To optimize GelMA sealant properties for superior performance in sealing tissue defects, particularly in the lungs.

Main Methods:

• Modified GelMA biopolymer synthesis and photocrosslinking.
• Optimization of GelMA formulation parameters (degree of modification, concentration, crosslinking conditions).
• In vitro mechanical testing (ASTM standards) and in vivo evaluation in small and large animal models for lung air leakage.

Main Results:

• Photocrosslinked GelMA sealants demonstrated superior adhesion and mechanical properties compared to fibrin and poly(ethylene glycol) glues.
• GelMA effectively sealed large lung leakages in vivo without sutures/staples, outperforming current clinical standards.
• High biocompatibility was confirmed through low inflammatory response and rapid in vivo degradation, supporting wound healing.

Conclusions:

• GelMA sealant is a promising, cost-effective biomaterial for sealing lung air leaks and potentially aiding tissue regeneration.
• Its superior performance, biocompatibility, and ease of application position GelMA as a valuable alternative to conventional surgical methods.