Adipose-derived cell construct stabilizes heart function and increases microvascular perfusion in an established...

Area of Science:

• Regenerative Medicine
• Cardiovascular Research
• Tissue Engineering

Background:

• Myocardial infarction (MI) significantly impairs cardiac function.
• Previous studies demonstrated immediate SVF treatment preserves cardiac function.
• Investigating SVF treatment for established infarcts is clinically relevant.

Purpose of the Study:

• To evaluate the cardiac recovery potential of SVF constructs implanted onto established infarcts.
• To assess the impact of SVF treatment on established myocardial injury.
• To determine if SVF therapy can improve cardiac performance and tissue perfusion post-MI.

Main Methods:

• SVF cells isolated from rat adipose tissue and cultured on Vicryl scaffolds.
• Established myocardial infarction model in Fischer-344 rats.
• Groups included: established MI, MI treated with SVF construct, MI treated with Vicryl construct, and MI at intervention time point.
• Cardiac function (Emax), infarct volume (PET imaging), and microvascularization (immunohistochemistry) were assessed.

Main Results:

• SVF treatment in established infarcts improved systolic performance (Emax) compared to controls.
• Positron emission tomography showed reduced relative infarct volume in the SVF-treated group.
• Immunohistochemistry revealed increased total vessel count and perfusion in the SVF-treated infarct region.
• Cardiac function and infarct size were stabilized by SVF treatment, preventing further deterioration.

Conclusions:

• SVF treatment of established myocardial infarction stabilizes cardiac performance and infarct volume.
• SVF therapy promotes increased microvessel perfusion and vessel count in the established infarct area.
• This study suggests SVF holds potential for treating established cardiac injury, improving heart function and tissue viability.