Related Experiment Videos
DNA synthesis and multinucleation in embryonic stem cell-derived cardiomyocytes
M G Klug1, M H Soonpaa, L J Field
1Krannert Institute of Cardiology, Indiana University School of Medicine, Indianapolis 46202, USA.
The American Journal of Physiology
|December 1, 1995
Summary
Embryonic stem cell-derived cardiomyocytes show active cell division and then decrease DNA synthesis, similar to normal heart development. This provides a valuable in vitro model for studying cardiomyocyte cell cycle regulation.
Area of Science:
- Cardiovascular Biology
- Stem Cell Biology
- Developmental Biology
Background:
- Embryonic stem (ES) cells offer a promising source for generating cardiomyocytes.
- Understanding the proliferative capacity of these cells is crucial for regenerative medicine and developmental studies.
Purpose of the Study:
- To assess the proliferative capacity of cardiomyocytes derived from embryonic stem cells.
- To investigate the cell cycle dynamics of ES-cell-derived cardiomyocytes during in vitro cardiogenesis.
Main Methods:
- Isolation of enriched cardiomyocyte preparations from embryoid bodies via microdissection.
- Immunocytology for cell identity confirmation.
- [3H]thymidine incorporation and pulse-chase experiments to monitor mitotic activity.
Main Results:
- ES-derived cardiomyocytes exhibited mitotic activity and were predominantly mononucleated at 11 days post-induction.
- By 21 days post-induction, DNA synthesis decreased, and multinucleation increased.
- The duration of cardiomyocyte proliferation in vitro mirrored that of normal murine cardiogenesis.
Conclusions:
- ES-derived cardiomyocytes demonstrate a cell cycle regulation pattern akin to in vivo development.
- The genetic manipulability of ES cells makes this system valuable for studying cardiomyocyte cell cycle regulation.
- This in vitro model can be used to investigate the molecular mechanisms governing cardiomyocyte proliferation.