A synthetic elastomer based on acrylated polypropylene glycol triol with tunable modulus for tissue engineering...

Area of Science:

• Biomaterials Science
• Tissue Engineering
• Polymer Chemistry

Background:

• Sophisticated manipulation of cellular behavior requires synthetic biomaterials that replicate native tissue micro-environments.
• Existing synthetic biomaterials often lack the ability to modulate cytoskeletal tension via tunable stiffness within biologically relevant ranges (1-100 kPa).
• Key properties such as biodegradability, biocompatibility, and processability are crucial for effective tissue engineering scaffolds.

Purpose of the Study:

• To develop a novel, non-cytotoxic, biodegradable elastomer system for mimicking tissue micro-environments.
• To create a synthetic biomaterial capable of modulating cellular behavior through tunable substrate stiffness.
• To evaluate the utility of this new elastomer for tissue engineering and biomedical applications.

Main Methods:

• Synthesis and characterization of a novel polymer system based on acrylated polypropylene glycol triol (aPPGT).
• Tuning the elastic moduli of the aPPGT elastomer within the 1-100 kPa range.
• Fabrication of 3D porous scaffolds and micropatterned substrates from the aPPGT elastomer.
• Assessment of the non-cytotoxicity, degradability, and surface modification capabilities of aPPGT.
• Evaluation of the effects of aPPGT substrates on human mesenchymal stem cell (hMSC) morphology, growth, and differentiation.

Main Results:

• The synthesized aPPGT elastomer system is non-cytotoxic and possesses tunable elastic moduli.
• The aPPGT material is degradable, biocompatible, and amenable to surface modification and fabrication into various forms (scaffolds, micropatterned substrates).
• aPPGT substrates effectively modulated hMSC morphology, growth, and differentiation, achieving outcomes comparable to established non-degradable polyacrylamide substrates.

Conclusions:

• Acrylated polypropylene glycol triol (aPPGT) represents a versatile and effective biodegradable elastomer for mimicking tissue micro-environments.
• The tunable stiffness and other favorable properties of aPPGT make it a promising candidate for advanced tissue engineering strategies.
• This degradable polymer system offers a valuable alternative to non-degradable materials for various biomedical applications requiring precise control over cellular responses.