A nature-inspired multifunctional adhesive for cartilage tissue-biomaterial integration

Area of Science:

• Biomaterials Science
• Tissue Engineering
• Surgical Innovation

Background:

• Surgical adhesives struggle with wet environments and cartilage repair.
• Existing adhesives lack sufficient strength and biocompatibility for moist tissues.

Purpose of the Study:

• To develop and evaluate a novel bio-inspired adhesive for wet tissue applications, specifically cartilage repair.
• To assess the chemical structure, adhesion, degradation, and biocompatibility of a dopamine-modified hyaluronic acid derivative.

Main Methods:

• Preparation of a three-armed dopamine-modified hyaluronic acid derivative (OGMHA8-DOPA).
• Evaluation of chemical structure, microscopic morphology (SEM), adhesion to cartilage, in vivo degradation, and biological response.
• Optimization of aldehyde substitution and dopamine-grafting rates.

Main Results:

• OGMHA8-DOPA demonstrated a porous interconnected structure upon adhering to cartilage.
• The adhesive showed excellent biocompatibility, supporting chondrocyte adhesion and proliferation.
• Animal studies revealed no inflammatory response or fibrous capsule formation, with degradation exceeding two weeks.

Conclusions:

• The dopamine-modified hyaluronic acid adhesive provides strong interfacial binding in wet conditions.
• This biomaterial shows significant potential for cartilage tissue repair and minimally invasive surgical procedures.