SDF-1 loaded dECM patch improves cardiac function in rats after myocardial ischemia

Area of Science:

• Biomaterials Science
• Regenerative Medicine
• Cardiovascular Research

Background:

• Ischemic heart disease (IHD) causes irreversible cardiomyocyte loss and ventricular remodeling.
• Current myocardial patches lack bioactive components for tissue regeneration.
• A novel stromal cell-derived factor-1 (SDF-1)-loaded decellularized extracellular matrix (dECM) patch (SDF-dECM) is introduced to address these limitations.

Purpose of the Study:

• To develop and evaluate a dual-functional SDF-dECM patch for myocardial repair.
• To assess the patch's ability to deliver SDF-1, support cell migration, and provide biomechanical stability.
• To investigate the therapeutic efficacy of the SDF-dECM patch in a rat model of myocardial infarction.

Main Methods:

• Fabrication and characterization of the SDF-dECM patch, including physicochemical properties and SDF-1 release kinetics.
• In vitro assessment of SDF-1's chemotactic effect on bone marrow mesenchymal stem cells (BMMSCs).
• In vivo evaluation in a rat myocardial infarction model, assessing cardiac function, tissue regeneration, and cell homing using echocardiography and histological analyses.

Main Results:

• The SDF-dECM patch demonstrated sustained SDF-1 release and favorable mechanical properties.
• SDF-1 effectively promoted BMMSC migration via the SDF-1/CXCR4 axis.
• In vivo studies showed the SDF-dECM patch significantly improved cardiac function, enhanced BMMSC homing, promoted vascularization, and reduced cardiomyocyte apoptosis and infarct size.

Conclusions:

• The SDF-dECM patch offers a dual-functional approach, combining sustained SDF-1 delivery for BMMSC mobilization with biomechanical support.
• This synergistic strategy effectively mitigates ventricular remodeling and improves cardiac function post-myocardial infarction.
• The SDF-dECM patch represents a promising therapeutic strategy for IHD, overcoming limitations of conventional biomaterials.