Related Experiment Video
Updated: Aug 13, 2026
09:29
Assessing Cardiomyocyte Subtypes Following Transcription Factor-mediated Reprogramming of Mouse Embryonic Fibroblasts
Published on: March 22, 2017
Reprogramming of bone marrow mesenchymal stem cells into cardiomyocytes
1Institute for Advanced Cardiac Therapeutics, Institute of Integrated Medical Research 7S1/7S2, Keio University School of Medicine, 35 Shinanomachi, Shinjuku-ku, Tokyo 160-8582, Japan. kfukuda@sc.itc.keio.ac.jp
Comptes Rendus Biologies
|December 24, 2002
Summary
Researchers generated cardiomyogenic cells from bone marrow stem cells. These cells mimic cardiomyocytes, offering potential for future heart failure cell transplantation therapy.
Area of Science:
- Regenerative Medicine
- Stem Cell Biology
- Cardiovascular Research
Background:
- Mesenchymal stem cells (MSCs) are multipotent stromal cells with potential for tissue regeneration.
- Developing cell therapies for heart failure requires reliable sources of functional cardiomyocytes.
- Murine bone marrow-derived MSCs were investigated for their cardiomyogenic potential.
Purpose of the Study:
- To isolate and characterize a cardiomyogenic cell line from murine bone marrow MSCs.
- To evaluate the potential of these cells for cardiac cell transplantation therapy.
Main Methods:
- Isolation of a cardiomyogenic cell line (CMG cells) from murine bone marrow MSCs.
- Induction of differentiation using 5-azacytidine.
- Morphological, ultrastructural, and functional characterization (spontaneous beating, action potentials).
- Gene expression analysis of contractile proteins and receptor profiling (adrenergic, muscarinic).
- Pharmacological stimulation and signaling pathway analysis (ERK phosphorylation).
Main Results:
- A novel cardiomyogenic cell line (CMG cells) was successfully isolated from murine bone marrow MSCs.
- 5-azacytidine treatment induced fibroblast-like CMG cells to exhibit cardiomyocyte-like morphology and spontaneous beating.
- CMG cells expressed cardiac-specific genes (ANP, BNP) and possessed cardiomyocyte-like ultrastructure.
- Electrophysiological studies revealed sinus-node-like and ventricular-cell-like action potentials.
- CMG cells expressed functional adrenergic and muscarinic receptors, responding to pharmacological stimuli.
- Isoproterenol increased beating rate, demonstrating functional adrenergic signaling.
Conclusions:
- Murine bone marrow MSCs can be differentiated into functional cardiomyogenic cells (CMG cells).
- These CMG cells exhibit key characteristics of cardiomyocytes, including electrophysiological and contractile protein expression.
- The findings support the potential of autologous bone marrow-derived cells for regenerating cardiomyocytes in heart failure patients.
