Slicing and Culturing Pig Hearts under Physiological Conditions

Area of Science:

• Cardiovascular Research
• Drug Discovery and Development
• Biomedical Engineering

Background:

• Current methods for predicting drug cardiotoxicity are inadequate, leading to costly clinical trial failures.
• Immature human induced pluripotent stem cell-derived cardiomyocytes (hiPSC-CMs) lack the complexity of adult heart tissue.
• A need exists for predictive in vitro models that mimic human cardiac physiology for drug safety testing.

Purpose of the Study:

• To develop and optimize a novel culture system for intact human and animal heart slices.
• To establish a reliable in situ model for predicting drug-induced cardiotoxicity.
• To bridge the gap between preclinical drug testing and clinical outcomes.

Main Methods:

• Optimized culture media components and conditions, including continuous electrical stimulation (1.2 Hz) and intermittent oxygenation.
• Developed a protocol for slicing and culturing pig heart slices, applicable to human, dog, sheep, and cat hearts.
• Utilized intact multicellular heart slices to mimic the human myocardium.

Main Results:

• Successfully preserved viability and functionality of heart slices for up to 6 days in culture.
• Demonstrated the potential of the heart slice culture system as a predictive model for acute cardiotoxicity.
• Established a method for culturing various mammalian heart slices, including human.

Conclusions:

• The developed heart slice culture system offers a promising in situ model for accurate cardiotoxicity assessment.
• This advanced model can significantly improve the prediction of drug liabilities, reducing late-stage failures.
• The protocol provides a valuable tool for pharmaceutical research, enhancing drug safety evaluations.