Electrically Conductive Polymers in Cardiac Tissue Engineering

Electrically conductive polymers have emerged as pivotal materials for engineering cardiac tissues by recreating the native electrochemical microenvironment of the myocardium. These polymers—ranging from intrinsically conducting chains such as polypyrrole and polyaniline to composites functionalised with conductive ionic liquids—provide pathways for electrical signal propagation, promote synchronous cardiomyocyte contraction and support tissue remodelling after injury. By integrating conductive polymers into hydrogels, films and three-dimensional scaffolds, researchers aim to combine optimal mechanical compliance, long-term electrical stability and biocompatibility. Such constructs facilitate cell alignment, enhance gap-junction formation and can be engineered for injectable or implantable formats. Key challenges include balancing electrical performance with degradation profiles, ensuring biosafety over chronic implantation and scaling fabrication methods for clinical translation. Progress in material functionalisation, microfabrication and in vivo validation is rapidly advancing the field towards practical therapies for myocardial infarction repair and arrhythmia prevention.

Research from Nature Portfolio

Recent studies have engineered bio-ionic liquid conjugated hydrogels by grafting a choline-based conductive ionic liquid onto conventional polymer backbones. These electroconductive hydrogels exhibit tunable stiffness and high electrical conductivity without additional fillers, and they maintain conductivity under physiological conditions. In vitro assays demonstrate robust support of primary cardiomyocyte viability and contractile function in both two-dimensional and three-dimensional cultures. Subcutaneous implantation in animal models reveals efficient biodegradation, low immunogenicity and retention of conductive properties, establishing a new paradigm for electronically stable, biodegradable scaffolds tailored for cardiac regeneration.

Research from all publishers

Advances in 3D-printable electroconductive scaffolds have been shown by incorporating polypyrrole nanoparticles into gelatin–hyaluronic acid hydrogels. These scaffolds achieve tunable porosity and mechanical strength matching cardiac tissue and attain conductivities on the order of 10⁻⁶ S cm⁻¹, supporting mesenchymal and cardiac progenitor cell attachment, proliferation and alignment under dynamic culture. Another body of work has systematically reviewed electroactive biomaterials that synergise with external electrical stimulation and piezoelectric elements to boost cardiac cell maturation, enable real-time monitoring of electrophysiological activity and harness cardiac mechanical energy for self-powered stimulation. Additionally, auxetic cardiac patches micro-patterned from chitosan–polyaniline composites demonstrate a negative Poisson’s ratio, tailored anisotropic mechanics and persistent electrical conductivity. These patches conform to the beating heart, preserve normal electrophysiology ex vivo and show minimal fibrotic response in vivo, indicating promise as dynamic, conductive implants for myocardial infarction therapy.

Electrically Conductive Polymers in Cardiac Tissue Engineering publication trend

The graph below shows the total number of articles in electrically conductive polymers in cardiac tissue engineering across all publications each year (not limited to Nature Index journals).

Technical terms

Conductive polymer: A synthetic polymer capable of conducting electrical charge, often through conjugated π systems or dopant incorporation.

Hydrogel: A three-dimensional network of hydrophilic polymers that retains water while providing mechanical support and cell-friendly matrices.

Scaffold: A porous biomaterial architecture designed to support cell adhesion, guide tissue formation and mimic native extracellular matrix.

Electrostimulation: Application of controlled electrical signals to cells or tissues to modulate activity, differentiation and maturation.

Polypyrrole (PPy): An intrinsically conducting polymer formed by oxidative polymerisation of pyrrole monomers, widely used in electroactive biomaterials.

Polyaniline (PANI): A conductive polymer whose oxidation and protonation states can be tuned to adjust conductivity and biocompatibility in composites.

References

1. 3D printable electroconductive gelatin-hyaluronic acid materials containing polypyrrole nanoparticles for electroactive tissue engineering. Advanced Composites and Hybrid Materials (2023).
2. Electroactive biomaterials synergizing with electrostimulation for cardiac tissue regeneration and function-monitoring. Materials Today (2023).
3. Auxetic Cardiac Patches with Tunable Mechanical and Conductive Properties toward Treating Myocardial Infarction. Advanced Functional Materials (2018).
4. Engineering Biodegradable and Biocompatible Bio-ionic Liquid Conjugated Hydrogels with Tunable Conductivity and Mechanical Properties. Scientific Reports (2017).