STABILITY OF THE GELS BASED ON TYPE I COLLAGEN AND HYALURONIC ACID

Area of Science:

• Biomaterials Science
• Regenerative Medicine
• Tissue Engineering

Background:

• Hyaluronic acid (HA) is crucial for regenerative medicine but its water solubility challenges scaffold stability.
• Chemical crosslinking is often used to retain HA, but biological alternatives are sought.

Purpose of the Study:

• To evaluate the stability of collagen-HA gels.
• To investigate the role of fibronectin and fibroblasts as biological agents to improve HA retention in scaffolds.

Main Methods:

• Preparation of collagen-HA gels.
• Assessment of HA diffusion in buffer solutions.
• Incorporation of fibronectin and human dermal fibroblasts.
• Alcian blue staining and agarose gel electrophoresis to quantify HA.

Main Results:

• HA diffused from collagen gels within 1–3 days.
• Neither fibronectin nor fibroblasts alone prevented HA diffusion.
• Co-inoculation with fibroblasts and fibronectin significantly increased HA retention.
• Conditioned media showed higher molecular weight HA, indicating de novo synthesis.

Conclusions:

• Collagen-HA gels exhibit limited stability in buffer solutions.
• Fibroblasts, influenced by fibronectin, can synthesize HA and partially compensate for diffusion losses.
• This suggests a potential biological strategy for stabilizing HA-based scaffolds.