Bioactive Polyurethane-Poly(ethylene Glycol) Diacrylate Hydrogels for Applications in Tissue Engineering

Area of Science:

• Biomaterials Science
• Tissue Engineering
• Polymer Chemistry

Background:

• Polyurethanes (PUs) are versatile biomaterials with extensive research for biomedical uses.
• Challenges in controlling PU material properties and cellular response hinder clinical translation of PU-based tissue scaffolds.
• Existing PU scaffolds often lack tunable biological functions and mechanical properties.

Purpose of the Study:

• To develop a simple method for synthesizing tunable, bioactive polyurethanes (PUs) blended with poly(ethylene glycol) diacrylate (PEGDA) hydrogels.
• To create a versatile platform for modifying hydrogels with peptides or proteins to impart specific biological functions.
• To investigate the mechanical tunability and cellular response of these novel PU-PEG blended hydrogels.

Main Methods:

• Synthesis of photocurable PU and PEGDA hydrogels.
• Modification of hydrogels with PEGylated peptides or proteins.
• Tuning mechanical properties by adjusting PU and PEGDA ratios.
• In vitro studies using human cells to assess cell adhesion and viability.

Main Results:

• Successfully synthesized tunable, bioactive PU-PEG blended hydrogels.
• Demonstrated that mechanical properties can be controlled by varying PU and PEGDA ratios.
• Confirmed that hydrogels support human cell adhesion and viability when functionalized with cell adhesion peptides.
• Showcased the ability to impart variable biological functions through peptide/protein modification.

Conclusions:

• PU-PEG blended hydrogels offer a highly tailorable system for creating synthetic extracellular matrices.
• These materials overcome previous limitations in balancing material properties with cellular response for PU-based scaffolds.
• The developed hydrogels represent a promising advancement for tissue engineering applications requiring adaptable biomaterials.