Decellularized extracellular matrix bio-patch with strong and biodegradable wet adhesive interface for sutureless...

Area of Science:

• Biomaterials Science
• Tissue Engineering
• Regenerative Medicine

Background:

• Decellularized extracellular matrix (ECM) bio-patches are ideal for soft tissue repair due to biocompatibility.
• Current fixation methods (sutures, staples) cause secondary damage and inflammation.
• A need exists for improved fixation methods for ECM-based bio-patches.

Purpose of the Study:

• To develop a novel self-adhesive small intestinal submucosa (SIS) bio-patch (A-SIS).
• To evaluate the adhesive properties, mechanical strength, and biocompatibility of the A-SIS patch.
• To assess the in vivo efficacy of the A-SIS patch for soft tissue defect repair and wound healing.

Main Methods:

• Fabrication of A-SIS by in situ polymerization of a biodegradable hydrogel adhesive on SIS.
• Assessment of tensile strength, biodegradability, and wet adhesion to various soft tissues.
• In vivo evaluation in porcine models, comparing A-SIS to sutured SIS patches for wound healing and tissue integration.

Main Results:

• A-SIS demonstrated increased tensile strength, biodegradability, and strong wet adhesion (100 kPa shear strength, 700 J/m² interfacial toughness on porcine skin).
• In vivo studies showed reduced surgical time, enhanced tissue integration, and decreased inflammatory cell infiltration compared to sutured patches.
• A-SIS effectively accelerated healing of diabetic ulcers and full-thickness wounds in preclinical models.

Conclusions:

• The novel A-SIS patch provides a strong, self-adhesive interface for ECM-based bio-patches.
• A-SIS offers a promising sutureless alternative for soft tissue defect repair, improving outcomes and reducing complications.
• This technology has significant potential for clinical applications in regenerative medicine and wound management.