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Published on: June 15, 2016
Transcriptional regulation of the cardiac conduction system
Vincent W W van Eif1, Harsha D Devalla1,2, Gerard J J Boink1,2
1Department of Medical Biology, Amsterdam Cardiovascular Sciences, Academic Medical Center, Amsterdam, Netherlands.
Insights
The cardiac conduction system (CCS) coordinates heartbeats using specialized tissues. This review explores transcriptional networks crucial for CCS development and function, offering insights for new therapies.
Area of Science:
- Cardiology
- Developmental Biology
- Molecular Biology
Background:
- The cardiac conduction system (CCS) regulates heart rate and rhythm through specialized tissues.
- CCS function is conserved across vertebrates, with unique features in endotherms.
- CCS development and homeostasis depend on complex transcriptional and regulatory networks.
Purpose of the Study:
- To review emerging data on transcriptional networks governing cardiac conduction system formation and function.
- To discuss the application of these insights for developing disease models and therapies.
Main Methods:
- Review of animal studies.
- Analysis of stem cell models.
- Examination of genome-wide association studies.
Main Results:
- Novel insights into the transcriptional networks underlying CCS development and function.
- Understanding of stage-dependent, tissue-dependent, and dose-dependent regulatory mechanisms.
- Identification of conserved and specialized aspects of CCS function.
Conclusions:
- Transcriptional networks are fundamental to cardiac conduction system formation and function.
- Emerging data provide a basis for developing novel therapeutic strategies for cardiac conduction disorders.
- Further research integrating animal models, stem cells, and genetic studies will advance CCS understanding.
Abstract:
The rate and rhythm of heart muscle contractions are coordinated by the cardiac conduction system (CCS), a generic term for a collection of different specialized muscular tissues within the heart. The CCS components initiate the electrical impulse at the sinoatrial node, propagate it from atria to ventricles via the atrioventricular node and bundle branches, and distribute it to the ventricular muscle mass via the Purkinje fibre network. The CCS thereby controls the rate and rhythm of alternating contractions of the atria and ventricles. CCS function is well conserved across vertebrates from fish to mammals, although particular specialized aspects of CCS function are found only in endotherms (mammals and birds). The development and homeostasis of the CCS involves transcriptional and regulatory networks that act in an embryonic-stage-dependent, tissue-dependent, and dose-dependent manner. This Review describes emerging data from animal studies, stem cell models, and genome-wide association studies that have provided novel insights into the transcriptional networks underlying CCS formation and function. How these insights can be applied to develop disease models and therapies is also discussed.
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