Hyaluronic acid based materials for scaffolding via two-photon polymerization

Area of Science:

• Biomaterials Science
• Tissue Engineering
• Polymer Chemistry

Background:

• Hydrogels mimic native tissue properties, but their poor mechanical strength hinders scaffold fabrication.
• Hyaluronic acid (HA), a key extracellular matrix component, is an attractive biomaterial for tissue engineering.
• Precise fabrication of complex 3D hydrogel structures remains a significant challenge.

Purpose of the Study:

• To develop advanced 3D hydrogel scaffolds with enhanced mechanical properties for tissue engineering.
• To utilize two-photon polymerization (2PP) for precise fabrication of hyaluronic acid-based microstructures.
• To improve the biological functionality of HA scaffolds through chemical modification.

Main Methods:

• Chemical modification of hyaluronic acid (HA) to enable two-photon polymerization (2PP).
• Covalent cross-linking of HA with poly(ethylene glycol) diacrylate (PEGDA) to tailor mechanochemical properties.
• Fabrication of 3D HA and HA-PEGDA microstructures using 2PP.
• Functionalization of HA with human epidermal growth factor (hEGF) for enhanced biological activity.

Main Results:

• Successful application of 2PP for the precise fabrication of complex 3D HA and HA-PEGDA microstructures.
• Creation of hydrogel scaffolds with tunable mechanochemical properties through HA-PEGDA cross-linking.
• Demonstration of HA functionalization with hEGF for improved biological integration.

Conclusions:

• Two-photon polymerization enables precise 3D fabrication of modified hyaluronic acid hydrogels.
• Covalent cross-linking with PEGDA enhances the mechanical properties of HA-based scaffolds.
• Functionalization with growth factors can improve the biocompatibility and efficacy of engineered tissue scaffolds.