A Simplified Langendorff-Based Method for Mouse Cardiac Myocyte Isolation

Area of Science:

• Cardiovascular Biology
• Cellular Physiology
• Biomedical Engineering

Background:

• Adult mouse ventricular myocyte isolation is crucial for cardiac research.
• Traditional Langendorff perfusion systems are complex and require specialized equipment.
• Variability in enzyme delivery can affect myocyte yield and quality.

Purpose of the Study:

• To develop a simplified, accessible, and reproducible method for isolating adult mouse ventricular myocytes.
• To improve the consistency of enzyme delivery during enzymatic digestion.
• To facilitate myocyte isolation in laboratories with limited perfusion infrastructure.

Main Methods:

• A syringe pump-driven system for constant-flow retrograde aortic perfusion.
• An inline heater for precise temperature control during enzymatic digestion.
• Utilizing widely available laboratory components for accessibility.

Main Results:

• High-quality, calcium-tolerant adult ventricular myocytes were consistently isolated.
• The constant-flow system maintained stable perfusion despite changes in coronary resistance.
• Reduced technical complexity and improved reproducibility compared to traditional methods.

Conclusions:

• The simplified Langendorff protocol offers an accessible alternative for cardiomyocyte isolation.
• This method enhances the reliability of functional analyses, including electrophysiology and contractility studies.
• Facilitates adoption in diverse research settings, promoting cardiac research advancement.