A biodegradable, microstructured, electroconductive and nano-integrated drug eluting patch (MENDEP) for myocardial...

Area of Science:

• Biomaterials Science
• Regenerative Medicine
• Cardiovascular Engineering

Background:

• Adverse ventricular remodeling post-myocardial infarction leads to heart failure.
• Current treatments have limitations in promoting endogenous repair mechanisms.

Purpose of the Study:

• To develop and evaluate a microstructured, electroconductive, and nano-functionalized drug-eluting cardiac patch (MENDEP).
• To assess MENDEP's ability to recruit and differentiate endogenous precursor cells for cardiac repair.
• To investigate MENDEP's efficacy in counteracting ventricular remodeling in a rat model of ischemia/reperfusion (I/R).

Main Methods:

• MENDEP fabrication with specific microstructures, electroconductive, and nano-functionalized properties.
• In vitro characterization including cytocompatibility, cardioinductivity, migration, and conductivity assays.
• In vivo epicardial implantation in a rat I/R model followed by histological, immunofluorescence, and biomarker analysis.

Main Results:

• MENDEP exhibited mechanical properties similar to myocardium, controlled drug release, and biodegradability.
• In vitro tests confirmed cytocompatibility, cardioinductivity, chemoattraction, and preserved cell synchronicity.
• In vivo, MENDEP was retained, vascularized, recruited precursor cells, promoted vascular differentiation, preserved myocardium, and reduced fibrosis in the infarcted area.

Conclusions:

• MENDEP is a promising biomaterial for cardiac repair, demonstrating effective precursor cell recruitment and differentiation.
• The patch supports myocardial preservation and functional recovery post-I/R injury without perturbing healthy tissue.
• MENDEP shows significant potential for treating myocardial infarction and preventing adverse ventricular remodeling.