Extracellular Matrix-Based Conductive Composites for Myocardial Tissue Regeneration

Area of Science:

• Biomaterials Science
• Regenerative Medicine
• Cardiovascular Engineering

Background:

• Myocardial infarction leads to functional loss, necessitating tissue regeneration strategies.
• Cardiac patches offer a promising solution for repairing damaged heart tissue.
• Existing strategies require enhancement for optimal efficacy.

Purpose of the Study:

• To develop a novel hybrid cardiac patch composite.
• To incorporate multiwalled carbon nanotubes (MWCNTs) into a decellularized myocardium-poly(glycerol-sebacate) scaffold.
• To evaluate the material properties and biocompatibility for cardiac tissue engineering.

Main Methods:

• Fabrication of a hybrid scaffold combining decellularized myocardium with poly(glycerol-sebacate) polymer.
• Doping the cross-linked structure with multiwalled carbon nanotubes (MWCNTs).
• Characterization of electrical conductivity and Young's modulus; assessment of cell-material interactions and cytotoxicity.

Main Results:

• The composite elastomer exhibited a conductivity of 5 × 10^-3 ± 1 × 10^-3 S/m.
• Young's modulus of the composite was measured at 374 ± 75.8 kPa.
• Composite structures demonstrated effective cell adhesion and no cytotoxic effects.

Conclusions:

• The MWCNT-enhanced hybrid scaffold possesses suitable mechanical and electrical properties for cardiac tissue regeneration.
• The developed material is biocompatible and supports cardiomyocyte adhesion.
• This engineered cardiac patch represents a promising advancement in treating myocardial infarction.