Engineering a naturally-derived adhesive and conductive cardiopatch

Area of Science:

• Biomaterials Science
• Regenerative Medicine
• Cardiovascular Engineering

Background:

• Myocardial infarction (MI) causes heart damage, leading to non-conductive scar tissue formation.
• Existing bioengineered cardiac tissues face limitations in achieving ideal mechanical properties and electroconductivity for regeneration.
• Current methods for attaching cardiac patches often require sutures, which can be invasive.

Purpose of the Study:

• To engineer highly adhesive and electroconductive fibrous scaffolds for cardiac tissue regeneration.
• To develop a sutureless cardiopatch that integrates with native heart tissue.
• To evaluate the mechanical, conductive, and biological performance of the engineered cardiopatches.

Main Methods:

• Electrospinning of gelatin methacryloyl (GelMA) to create fibrous scaffolds.
• Conjugation of a choline-based bio-ionic liquid (Bio-IL) to enhance conductivity and adhesion.
• Optimization of GelMA/Bio-IL patches for mechanical and conductive properties similar to native myocardium.
• Assessment of patch adhesion to murine myocardium via ionic bonding.
• Co-culture of cardiomyocytes and cardiac fibroblasts on the patches to evaluate cell function and protein expression (connexin 43).

Main Results:

• Developed GelMA/Bio-IL patches with mechanical and conductive properties matching native myocardium.
• Achieved strong, sutureless adhesion to murine myocardium through ionic interactions.
• Demonstrated improved contractile profiles in co-cultured cardiac cells on GelMA/Bio-IL patches compared to controls.
• Observed over-expression of the gap junction protein connexin 43, indicating enhanced cell communication.

Conclusions:

• Engineered GelMA/Bio-IL cardiopatches offer a promising solution for cardiac tissue regeneration after MI.
• The sutureless adhesion mechanism simplifies implantation and reduces tissue trauma.
• These patches can restore electromechanical coupling, provide mechanical support, and potentially minimize adverse cardiac remodeling.