Succinimidyl Alginate-Modified Fibrin Hydrogels from Human Plasma for Skin Tissue Engineering.

Area of Science:

• Biomaterials Science
• Tissue Engineering
• Regenerative Medicine

Background:

• Plasma-derived fibrin hydrogels are vital 3D matrices in tissue engineering.
• Native fibrin hydrogels have limitations in mechanical stability and degradation resistance for advanced applications.
• Enhancing fibrin hydrogel stability is crucial for developing in vitro skin equivalents and engineered grafts.

Purpose of the Study:

• To chemically modify plasma-derived fibrin with succinimidyl alginate (SA).
• To evaluate the impact of SA incorporation on fibrin hydrogel mechanical properties, microstructure, and stability.
• To assess the suitability of SA-functionalized fibrin hydrogels for supporting skin tissue development in vitro.

Main Methods:

• Plasma-derived fibrin was chemically modified by incorporating succinimidyl alginate (SA).
• Hydrogels were prepared with varying SA concentrations (0.5, 1, 2, and 3 mg/mL).
• Mechanical properties, microstructure, biocompatibility, and in vitro skin model formation were evaluated using techniques like H&E staining and immunostaining.

Main Results:

• SA incorporation significantly improved the mechanical properties and stability of fibrin hydrogels.
• Reduced hydrogel contraction was observed with SA modification.
• Dermo-epidermal skin cultures demonstrated enhanced dermal stability and improved tissue structure on SA-functionalized hydrogels, particularly at 0.5 and 1 mg/mL SA concentrations.

Conclusions:

• SA-functionalized fibrin hydrogels offer enhanced stability and mechanical properties compared to native fibrin.
• These modified hydrogels show significant potential for creating more robust in vitro skin models.
• SA-functionalized fibrin hydrogels are promising biomaterials for engineered skin grafts and other tissue engineering applications.