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Genetic evaluation of dilated cardiomyopathy
Ana Morales1, Ray E Hershberger
1Division of Human Genetics, The Ohio State University College of Medicine, Columbus, OH 43210, USA. ana.morales@osumc.edu
Current Cardiology Reports
|May 21, 2013
Summary
Genetic testing for dilated cardiomyopathy (DCM) is advancing, with new guidelines and technologies identifying mutations in genes like BAG3 and TTN. This increases detection rates but also highlights the complexity of genetic evaluations for DCM.
Area of Science:
- Cardiovascular Genetics
- Molecular Cardiology
- Genetic Diagnostics
Background:
- Dilated cardiomyopathy (DCM) is a significant cause of heart failure.
- Comprehensive genetic evaluation is increasingly crucial for diagnosing and managing DCM.
- Recent technological advancements have improved the scope of genetic testing for DCM.
Purpose of the Study:
- To provide an updated review of the genetic evaluation for dilated cardiomyopathy (DCM).
- To highlight recent findings and updated guidelines in DCM genetics.
- To discuss the implications of new genetic discoveries and technologies.
Main Methods:
- Literature review of recent studies on DCM genetics.
- Analysis of updated clinical guidelines for genetic testing in DCM.
- Synthesis of data on identified gene mutations and their prevalence.
Main Results:
- Updated guidelines for genetic evaluation of DCM have been published.
- Mutations in BAG3 identified in 2% of DCM cases, including large deletions.
- Truncating TTN mutations found in 25% of DCM, significantly increasing detection rates.
- Two novel genes associated with autosomal recessive DCM have been reported.
- Overall genetic testing detection rate for DCM reaches 40% with TTN inclusion.
Conclusions:
- Improved technologies enhance the identification of disease-causing variants in DCM.
- The genetic architecture of DCM is complex, potentially involving polygenic inheritance.
- Increased identification of variants of unknown significance necessitates careful interpretation in genetic evaluations.
- A comprehensive genetic evaluation for DCM must address these complexities for accurate diagnosis and management.
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