Porous Heat-Treated Polyacrylonitrile Scaffolds for Bone Tissue Engineering

Area of Science:

• Biomaterials Science
• Regenerative Medicine
• Tissue Engineering

Background:

• Heat-treated polyacrylonitrile (HT-PAN), known as black orlon (BO), is a carbon-based material with potential in tissue engineering.
• Existing research lacks complex 3D BO structures that mimic bone morphology.

Purpose of the Study:

• To create and characterize novel 3D black orlon (BO) cryogel scaffolds with bone-like porous structures.
• To evaluate the osteoconductive potential and mechanical properties of these BO scaffolds for bone tissue engineering.

Main Methods:

• Fabrication of 3D cryogel scaffolds using HT-PAN and succinonitrile as a porogen.
• Characterization of scaffold morphology, cell adhesion, proliferation, and mitochondrial activity.
• Assessment of mechanical properties, including compressive modulus and strength.

Main Results:

• Successfully fabricated 3D BO cryogel scaffolds with porous structures resembling bone tissue.
• Demonstrated strong osteoconductive activity, supporting human bone-derived cell adhesion, proliferation, and mitochondrial activity.
• Scaffolds with higher PAN content (10%) exhibited superior cell support and enhanced mechanical properties (compressive modulus and strength).

Conclusions:

• The developed 3D BO cryogel scaffolds possess bone-mimicking porous morphology and exhibit significant osteoconductive potential.
• Higher concentrations of PAN in the scaffolds enhance both biological activity and mechanical robustness.
• These advanced scaffolds show robust potential for applications in bone tissue engineering and regenerative medicine.