Stretchable degradable and electroactive shape memory copolymers with tunable recovery temperature enhance myogenic...

Area of Science:

• Biomaterials Science
• Polymer Chemistry
• Tissue Engineering

Background:

• Developing flexible, degradable electroactive shape memory polymers (ESMPs) with body-temperature-tunable switching is crucial for tissue engineering.
• Existing shape memory polymers (SMPs) are often biologically inert, and highly stretchable, electroactive degradable copolymers for soft tissue engineering are rare.

Purpose of the Study:

• To design and synthesize novel electroactive, super stretchable, and degradable shape memory copolymers.
• To evaluate the copolymers' properties, including tunable recovery temperature, elasticity, and shape memory behavior.
• To assess the copolymers' potential in enhancing myogenic differentiation of C2C12 myoblast cells.

Main Methods:

• Synthesized copolymers of poly(ε-caprolactone) (PCL) with varying molecular weights and conductive aniline trimer.
• Characterized copolymers using FT-IR, ¹H NMR, CV, UV-vis, DSC, shape memory tests, tensile tests, and in vitro enzymatic degradation.
• Investigated C2C12 myoblast proliferation and differentiation on copolymer films.

Main Results:

• Developed electroactive biodegradable shape memory copolymers with excellent elasticity and tunable recovery temperatures around 37°C.
• Demonstrated good shape memory properties and in vitro enzymatic degradability.
• Observed significantly enhanced proliferation, myotube formation, and myogenic gene expression in C2C12 cells compared to pure PCL.

Conclusions:

• The synthesized electroactive, highly stretchable, biodegradable shape memory polymers exhibit tunable recovery temperatures near body temperature.
• These materials show great potential as scaffolding biomaterials for skeletal muscle tissue engineering applications.
• The copolymers effectively promote myogenic differentiation, indicating their suitability for regenerative medicine.