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Related Experiment Video

Updated: Feb 28, 2026

Isolation and Cryopreservation of Neonatal Rat Cardiomyocytes
07:05

Isolation and Cryopreservation of Neonatal Rat Cardiomyocytes

Published on: April 9, 2015

13.3K

[Three Different Digestion Methods to Separate Neonatal Rat Cardiomyocytes].

Peng Duan1, Jin-Xin Wang1, Xiao-Jing Liu1

  • 1Department of Cardiovascular, Chinese PLA General Hospital, Beijing 100853, China;2.

Sichuan Da Xue Xue Bao. Yi Xue Ban = Journal of Sichuan University. Medical Science Edition
|June 15, 2017
PubMed
Summary

Isolated digestion using trypsin and collagenase is an effective method for separating neonatal rat cardiomyocytes, yielding higher cell viability and mitochondrial membrane potential compared to other methods. This approach is recommended for cardiomyocyte isolation.

Keywords:
Collagenase type 2LSCMMitochondrial membrane potentialNeonatal ratTrypsin

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Area of Science:

  • Cardiology
  • Cell Biology
  • Biochemistry

Background:

  • Neonatal rat cardiomyocytes are crucial for studying cardiac function and disease.
  • Efficient and reliable methods for cardiomyocyte isolation are essential for research.
  • Current isolation techniques vary in efficacy and impact on cell health.

Purpose of the Study:

  • To compare the efficacy of three distinct digestion methods for isolating neonatal rat cardiomyocytes.
  • To evaluate cell yield, purity, and viability across different enzymatic digestion protocols.
  • To determine the optimal method for preserving cardiomyocyte function and integrity.

Main Methods:

  • Three digestion groups were established: trypsin alone (A), mixed trypsin-collagenase (B), and isolated trypsin and collagenase digestion (C).
  • Cell number and viability were assessed post-differential adhesion.
  • Cardiomyocyte purity was determined by immunofluorescence, and cell vitality by JC-1 staining and confocal microscopy.

Main Results:

  • No significant difference in cell yield was observed among the three groups.
  • Group C (isolated trypsin and collagenase) demonstrated significantly higher cell viability and mitochondrial membrane potential (red/green fluorescence ratio) compared to Group A.
  • Cardiomyocyte purity was comparable across all tested methods.

Conclusions:

  • Isolated digestion using 0.08% trypsin and 0.08% type 2 collagenase is a highly effective method for neonatal rat cardiomyocyte separation.
  • This method enhances cell viability and preserves mitochondrial function, making it a suitable conventional technique.
  • The findings support the use of this specific enzymatic digestion protocol for robust cardiomyocyte isolation.