Chitosan-alginate biocomposite containing fucoidan for bone tissue engineering

Area of Science:

• Biomaterials Science
• Tissue Engineering
• Regenerative Medicine

Background:

• Artificial bone scaffolds are crucial for bone defect repair.
• Chitosan-alginate (Chi-Alg) is a common biomaterial, but its efficacy can be improved.
• Incorporating fucoidan may enhance the osteogenic properties of Chi-Alg scaffolds.

Purpose of the Study:

• To develop and characterize chitosan-alginate (Chi-Alg) and chitosan-alginate with fucoidan (Chi-Alg-fucoidan) scaffolds.
• To evaluate their potential as bone graft substitutes.
• To compare the in vitro performance of Chi-Alg-fucoidan scaffolds against Chi-Alg scaffolds.

Main Methods:

• Scaffolds were fabricated using the freeze-drying method.
• Physicochemical properties (porosity, water uptake, pore size) were analyzed.
• In vitro cytocompatibility, cell proliferation, and alkaline phosphatase secretion were assessed using MG-63 cells.
• Protein adsorption and mineralization assays were performed.

Main Results:

• Both Chi-Alg and Chi-Alg-fucoidan scaffolds exhibited similar porosity and water handling.
• Pore sizes ranged from 62-490 µm (Chi-Alg) and 56-437 µm (Chi-Alg-fucoidan).
• Chi-Alg-fucoidan scaffolds demonstrated superior cytocompatibility, cell proliferation, and alkaline phosphatase activity.
• Protein adsorption and mineralization were approximately doubled in Chi-Alg-fucoidan scaffolds.

Conclusions:

• Chi-Alg-fucoidan scaffolds show promising results for bone tissue regeneration.
• The addition of fucoidan significantly enhances the biological performance of Chi-Alg scaffolds.
• Chi-Alg-fucoidan is a potential advanced biomaterial for bone graft applications.