Rational design of injectable conducting polymer-based hydrogels for tissue engineering

Area of Science:

• Biomaterials Science
• Tissue Engineering
• Polymer Chemistry

Background:

• Injectable conducting polymer-based hydrogels (CPHs) are gaining traction in tissue engineering for their tunable conductivity and minimally invasive application.
• Incorporating conducting polymers (CPs) into hydrogels improves electrical integration with host tissues, aiding damaged tissue repair.
• In situ gelation and shear-thinning properties of CPHs minimize surgical trauma and inflammation, aligning with clinical translation goals for conductive biomaterials.

Purpose of the Study:

• To review recent advancements in the design of injectable hydrogels utilizing functionalized conducting polymers.
• To highlight the strategies for enhancing the water dispersibility and biocompatibility of conducting polymers for CPH fabrication.
• To discuss the potential applications of these advanced CPHs in regenerative medicine for neurological, cardiac, and skeletal muscle tissues.

Main Methods:

• Summarizing functionalization strategies for conducting polymers, including hydrophilic complexes, side-chain modification, and graft polymers.
• Reviewing fabrication techniques for injectable CPHs that achieve physical/chemical crosslinking under physiological conditions.
• Analyzing the properties of functional CPs that improve hydrophilicity and biocompatibility for injectable hydrogel systems.

Main Results:

• Functionalization significantly improves the hydrophilicity and biocompatibility of conducting polymers, overcoming limitations in CPH formulation.
• Novel CPHs demonstrate improved water dispersibility and processability, enabling uniform injectable formulations.
• These advancements facilitate the development of injectable CPHs suitable for physiological conditions.

Conclusions:

• Functionalized conducting polymers are key to developing advanced injectable CPHs for tissue engineering.
• These materials show significant promise for treating electroactive tissues with limited self-regeneration, such as neural, cardiac, and muscle tissues.
• Further research and development are crucial for the clinical translation of injectable CPHs in regenerative medicine.