Antibacterial Peptide-Based Gel for Prevention of Medical Implanted-Device Infection

Area of Science:

• Biomaterials Science
• Dental Materials
• Drug Delivery

Background:

• Implanted medical devices face significant infection risks, necessitating advanced prevention strategies.
• Hydrogels are explored as matrices for antimicrobial agents, particularly for moist environments like the oral cavity.

Purpose of the Study:

• To design and evaluate novel hydrogels incorporating the antimicrobial peptide Cateslytin for combating implant-associated infections.
• To assess the adhesion, rheological properties, mechanical stability, and antimicrobial efficacy of these hydrogels.

Main Methods:

• Two hydrogel formulations were synthesized: alginate-catechol (AC) and alginate-catechol/thiol-terminated Pluronic (AC/PlubisSH).
• Adhesion to implant surfaces and gingiva, rheological properties, and mechanical barrier strength were evaluated.
• Antimicrobial activity against P. gingivalis and general biocompatibility were assessed.

Main Results:

• Both hydrogels demonstrated strong adhesion to implant surfaces and gingiva, with AC/PlubisSH showing high dissipative energy.
• The Cateslytin-loaded hydrogels effectively inhibited the metabolic activity and viability of P. gingivalis.
• Biocompatibility tests confirmed no observed toxicity.

Conclusions:

• The developed hydrogels exhibit excellent adhesion, mechanical stability, and potent antimicrobial properties.
• These hydrogels show promise as injectable, in-situ gelling materials for preventing peri-implant diseases.