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Updated: Aug 18, 2025
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Epigenetic Regulation of Cardiac Differentiation of Embryonic Stem Cells and Tissues
Published on: June 3, 2016
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Deciphering Transcriptional Networks during Human Cardiac Development.
Robin Canac1, Bastien Cimarosti1, Aurore Girardeau1
1Nantes Université, CHU Nantes, CNRS, INSERM, l'institut du thorax, F-44000 Nantes, France.
Cells
|December 11, 2022
Summary
Researchers mapped human heart development by analyzing gene expression in stem cells. They discovered a network of transcription factors, including IRX3 and IRX5, that regulate key cardiac genes like SCN5A.
Area of Science:
- Cardiovascular Biology
- Stem Cell Biology
- Transcriptional Regulation
Background:
- Human heart development relies on complex transcription factor (TF) networks.
- Understanding these networks is crucial for characterizing cardiac development.
Purpose of the Study:
- To comprehensively map transcriptional regulations during human cardiac differentiation.
- To identify key transcription factors and their interactions governing heart development.
Main Methods:
- Generated daily transcriptomic profiles from human induced pluripotent stem cells over 32 days.
- Applied expression-based correlation to TF gene profiles, clustering them into sequential expression waves.
- Constructed a regulatory network of 216 TFs, identifying over 23,000 regulatory links.
Main Results:
- Identified novel transcriptional activations linking IRX3 and IRX5 TFs to master cardiac TFs (GATA4, NKX2-5, TBX5).
- Demonstrated that these five TFs mutually activate each other's expression and form physical complexes.
- Showed coordinated regulation of the cardiac sodium channel gene (SCN5A) by this TF network.
Conclusions:
- Unveiled thousands of TF interactions critical for human cardiac development.
- Generated robust hypotheses regarding the regulatory mechanisms underlying heart formation.
- Highlighted the role of IRX3, IRX5, GATA4, NKX2-5, and TBX5 in cardiac gene regulation.
Keywords:
gene regulatory networksheart developmenthuman induced pluripotent stem cellsiroquois transcription factorsstem cell differentiationtranscription factortranscription factor complexestranscriptomicsMore Related Videos
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