Full-Thickness Heart Repair with an Engineered Multilayered Myocardial Patch in Rat Model

Area of Science:

• Biomaterials Science
• Cardiovascular Research
• Regenerative Medicine

Background:

• Right ventricular (RV) free wall defects pose significant clinical challenges.
• Current treatments often involve autologous tissues or synthetic materials with limited regenerative capacity.
• There is a need for advanced biomaterials that promote cardiac tissue regeneration and functional recovery.

Purpose of the Study:

• To evaluate the efficacy of an engineered multilayered myocardial patch for RV free wall reconstruction.
• To compare the regenerative potential and functional outcomes of the engineered patch versus a commercial pericardium patch.
• To assess the impact of the engineered patch on myocardial and vascular remodeling.

Main Methods:

• Fabrication of a multilayered myocardial patch using a polycaprolactone membrane and a chitosan/heart matrix hydrogel.
• Surgical transplantation of the engineered patch to replace the RV free wall in a rat model.
• Assessment of muscular and vascular remodeling using histological and immunohistochemical analyses.
• Evaluation of RV function, specifically right ventricular ejection fraction (RVEF), using echocardiography.

Main Results:

• The engineered myocardial patch demonstrated significant muscular and vascular remodeling at the defect site.
• Rats treated with the engineered patch exhibited a significantly higher RVEF compared to the control group.
• The engineered patch promoted better integration and tissue regeneration compared to the commercial pericardium patch.

Conclusions:

• Engineered multilayered myocardial patches hold promise for treating RV free wall defects.
• This novel biomaterial facilitates significant cardiac tissue regeneration and functional improvement.
• The engineered patch represents a superior alternative to commercially available pericardium patches for RV reconstruction.