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SCN5A Variants: Association With Cardiac Disorders
Wenjia Li1, Lei Yin2, Cheng Shen3
1Department of Cardiology, Shanghai Institute of Cardiovascular Disease, Zhongshan Hospital, Fudan University, Shanghai, China.
Frontiers in Physiology
|October 27, 2018
Summary
Genetic variations in the SCN5A gene cause various cardiac disorders like Brugada syndrome. This review details SCN5A-related conditions and emerging therapies for prevention and treatment.
Area of Science:
- Cardiovascular Genetics
- Molecular Cardiology
- Electrophysiology
Background:
- The SCN5A gene encodes the Nav1.5 alpha subunit, crucial for cardiac sodium current (INa) and electrophysiological function.
- SCN5A variants are linked to Brugada syndrome, long QT syndrome, conduction defects, and dilated cardiomyopathy since 1995.
- While SCN5A variants' effects are known, detailed mechanisms in diverse clinical presentations remain unclear due to genetic and environmental factors.
Purpose of the Study:
- To review current knowledge on SCN5A genetic variations in cardiac disorders.
- To summarize identified arrhythmic and structural cardiac characteristics induced by SCN5A variants.
- To discuss novel therapeutic strategies for SCN5A-related cardiac conditions.
Main Methods:
- Literature review of genetic, electrophysiological, and molecular studies on SCN5A variants.
- Analysis of SCN5A-related cardiac disorders, including their phenotypes and mechanisms.
- Compilation of recent advancements in therapeutic approaches.
Main Results:
- SCN5A variants are associated with a spectrum of cardiac arrhythmias and structural abnormalities.
- Understanding genotype-phenotype correlations is complex due to variable penetrance and environmental influences.
- Emerging therapies show potential for managing SCN5A-related channelopathies.
Conclusions:
- SCN5A gene variations represent a significant cause of inherited cardiac diseases.
- Further research is needed to elucidate individualized mechanisms and optimize treatment strategies.
- This review provides a foundation for clinical management and future therapeutic development for SCN5A-related disorders.
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