[Cardiac function changes post stem cell perfusion in isolated apolipoprotein-E gene deficiency murine heart].

Area of Science:

• Cardiovascular Research
• Regenerative Medicine
• Stem Cell Biology

Context:

• Investigating the therapeutic potential of embryonic stem cells (ESCs) in cardiovascular disease models.
• Utilizing the Langendorff isolated heart system to assess cardiac function.
• Employing apolipoprotein-E gene-deficient (apo E-/-) mice as a model for atherosclerosis-prone hearts.

Purpose:

• To evaluate the impact of embryonic stem cell (ESC) perfusion at varying concentrations on cardiac function in isolated apo E-/- and wild-type (WT) hearts.
• To determine if ESCs affect hemodynamic parameters differently in atherosclerosis-prone versus healthy hearts.
• To quantify cell retention and expulsion rates post-perfusion.

Summary:

• Cardiac function was assessed in isolated apo E-/- and WT mouse hearts following perfusion with low (1.0 x 10^6) and high (2.5 x 10^6) doses of ESCs.
• ESC perfusion significantly impaired cardiac function in apo E-/- hearts, especially at higher doses, while WT hearts showed less impairment, except for a reduced heart rate.
• A significant portion of perfused ESCs (63.2% - 77.0%) were expelled from the heart within 30 minutes.

Impact:

• ESC perfusion negatively impacts cardiac function in a concentration-dependent manner, particularly in atherosclerosis-prone hearts.
• Findings suggest caution when considering ESC therapy for cardiovascular conditions due to potential functional impairment.
• This study provides critical data on the acute effects of ESC administration in an isolated heart model, informing future therapeutic strategies.