Methods of mouse cardiomyocyte isolation from postnatal heart

Area of Science:

• Cardiovascular Biology
• Cell Isolation Techniques
• Developmental Biology

Background:

• Primary cardiomyocytes (CMs) are crucial for in vitro studies of cardiac function and disease.
• Existing methods for isolating CMs lack comprehensive, comparative analysis across developmental stages.
• Optimized isolation protocols are needed for reliable CM research.

Purpose of the Study:

• To systematically compare and optimize protocols for isolating primary CMs from embryonic to adult mouse hearts.
• To establish reliable methods for obtaining high-quality CMs at various developmental time points.
• To provide detailed protocols supporting cardiovascular disease research.

Main Methods:

• Comparative analysis of trypsin digestion, Gentle MACS, and Langendorff perfusion methods.
• Isolation of CMs from embryonic, neonatal (P1-P3), and adult (P14, P56) mouse hearts.
• Validation of isolated CMs using RNA sequencing and functional assays (Angiotensin II treatment).

Main Results:

• Trypsin digestion is optimal for embryonic CM isolation.
• Gentle MACS effectively isolates neonatal CMs (P1-P3).
• Langendorff-free and Langendorff perfusion methods are suitable for CMs from P3 onwards, including P14 and P56.

Conclusions:

• This study presents optimized, stage-specific protocols for primary CM isolation.
• The validated methods ensure high-quality CMs for studying cardiac physiology and pathophysiology.
• These protocols support research into cardiovascular disease mechanisms, pathology, and pharmacology.