Polyester type polyHIPE scaffolds with an interconnected porous structure for cartilage regeneration

Area of Science:

• Biomaterials Science
• Orthopedic Surgery
• Tissue Engineering

Background:

• Cartilage regeneration is a significant challenge in orthopedics.
• Synthetic scaffolds are needed to facilitate neocartilage formation.
• Polymerization of high internal phase emulsions offers a route to advanced biomaterials.

Purpose of the Study:

• To investigate the potential of a synthetic polyHIPE polymer (PHP) scaffold for neocartilage formation.
• To tailor PHP scaffold properties for cartilage tissue engineering.
• To evaluate the biocompatibility and chondrogenic potential of the PHP scaffold.

Main Methods:

• Fabrication of a highly porous (85%) polyHIPE polymer scaffold with pore sizes of 50-170 μm.
• Assessment of scaffold biocompatibility using human articular chondrocytes and Live/Dead assays.
• Histological analysis, immunohistochemistry for collagen type 2, and gene expression analysis for chondrogenic markers.
• Evaluation of scaffold biodegradability and mechanical properties.

Main Results:

• The PHP scaffold demonstrated excellent biocompatibility with human articular chondrocytes.
• Chondrocytes infiltrated the scaffold up to 300 μm and formed multicellular layers.
• Accumulation of collagen type 2 and expression of chondrogenic genes were observed.
• PHP scaffolds are biodegradable with mechanical properties similar to native cartilage.

Conclusions:

• The developed polyHIPE polymer scaffold shows significant potential for cartilage tissue engineering.
• The scaffold supports chondrocyte growth, differentiation, and extracellular matrix production.
• This synthetic material offers a promising platform for orthopedic applications aimed at cartilage repair.