Sticky Polyelectrolyte Shield for Enhancing Biological Half-Life of Growth Factors

Area of Science:

• Biomaterials Science
• Regenerative Medicine
• Drug Delivery Systems

Background:

• Secretome delivery is crucial for regenerative medicine but faces challenges like short half-lives and diffusion in vivo.
• Existing delivery methods require enhancement to ensure prolonged retention and therapeutic efficacy of secretomes.

Purpose of the Study:

• To develop and evaluate a novel Coating Optimized Drug Delivery Enhancement (COD2E) system for improved secretome delivery.
• To assess the COD2E system's ability to encapsulate and stabilize fibroblast growth factor (FGF2) and its efficacy in a wound healing model.

Main Methods:

• Fabrication of the COD2E system using dopamine-functionalized fucoidan and poly-l-lysine coacervates.
• Modification with dopamine to enhance adhesive strength for rapid coating on collagen sponges.
• Encapsulation of fibroblast growth factor (FGF2) and evaluation of its half-life, antioxidant properties, adhesion, and hemocompatibility.

Main Results:

• The COD2E system demonstrated significantly enhanced adhesive strength (>7-fold) and rapid coating (5 min) on collagen sponges.
• Encapsulated FGF2 showed a prolonged half-life, and the system exhibited antioxidant properties and hemocompatibility.
• A single application of FGF2-loaded COD2E on collagen sponges successfully promoted tissue repair in a wound model.

Conclusions:

• The COD2E system is an effective vehicle for growth factor delivery, protecting therapeutic agents and enhancing their efficacy.
• Its adhesive properties, antioxidant capacity, and hemocompatibility make it suitable for various material surfaces in regenerative medicine.
• This system offers a promising solution for overcoming challenges in secretome delivery for enhanced therapeutic outcomes.