Enhanced cell functions on graphene oxide incorporated 3D printed polycaprolactone scaffolds

Area of Science:

• Biomaterials Science
• Tissue Engineering
• Nanotechnology

Background:

• Porous scaffolds are crucial for cell attachment and proliferation in 3D tissue engineering.
• Polycaprolactone (PCL) and graphene oxide (GO) are promising materials for bone tissue engineering scaffolds.

Purpose of the Study:

• To fabricate and characterize 3D printed PCL-GO scaffolds for bone tissue engineering.
• To investigate the effects of pore size and GO content on scaffold properties and biological activity.

Main Methods:

• Extrusion-based 3D printing of PCL-GO blends.
• Evaluation of mechanical properties, morphology, and biocompatibility.
• Assessment of cell proliferation, differentiation, ALP activity, mineralization, and protein expression (BMP-2, osteopontin).

Main Results:

• PCL-GO scaffolds with 400 μm pores exhibited higher compressive modulus than those with 800 μm pores.
• Increased cell attachment and proliferation were observed with the addition of GO.
• GO enhanced alkaline phosphatase activity and mineralization (calcium and phosphorus content).
• Pore size did not significantly impact cell proliferation or differentiation.

Conclusions:

• 3D printed PCL-GO scaffolds are a viable platform for bone tissue engineering.
• Graphene oxide incorporation significantly improves the osteogenic potential of PCL scaffolds.
• Further research into optimizing pore size and GO content could enhance regenerative capabilities.