Cellulose and collagen derived micro-nano structured scaffolds for bone tissue engineering.

Area of Science:

• Biomaterials Science
• Tissue Engineering
• Regenerative Medicine

Background:

• Scaffold-based bone tissue engineering (BTE) aims to regenerate bone defects.
• Natural polymers offer bioactivity and biocompatibility, mimicking the extracellular matrix (ECM).
• Challenges exist in fabricating natural polymer scaffolds with both bioactivity and mechanical integrity for BTE.

Purpose of the Study:

• To fabricate and characterize cellulose and collagen-based micro-nano structured scaffolds for BTE.
• To evaluate the performance of these natural scaffolds using human osteoblasts (HOB).
• To compare natural scaffolds with synthetic polyester scaffolds for BTE applications.

Main Methods:

• Fabrication of micro-nano structured scaffolds from cellulose and collagen.
• Characterization of scaffold porosity (average pore diameter 190 ± 10 µm).
• Assessment of mechanical properties (compressive modulus 266.75 ± 33.22 MPa, strength 12.15 ± 2.23 MPa).
• In vitro culture of human osteoblasts (HOB) on scaffolds.
• Evaluation of HOB adhesion, alkaline phosphatase activity, and mineral deposition.

Main Results:

• Scaffolds exhibited mechanical properties comparable to human trabecular bone.
• Cellulose and collagen scaffolds supported enhanced HOB adhesion and phenotype maintenance.
• Higher levels of osteogenic enzyme alkaline phosphatase and mineral deposition were observed compared to polyester controls.
• Scaffolds demonstrated good biocompatibility and osteoinductivity.

Conclusions:

• Cellulose and collagen-based micro-nano structured scaffolds are promising for BTE.
• These natural polymer scaffolds offer advantages over synthetic polyester scaffolds.
• They represent a viable alternative for regenerating lost bone tissue.