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Updated: Jul 19, 2025

Investigating the Pathogenesis of MYH7 Mutation Gly823Glu in Familial Hypertrophic Cardiomyopathy using a Mouse Model
Published on: August 8, 2022
Advanced searching for hypertrophic cardiomyopathy heritability in real practice tomorrow
Olga S Chumakova1, Natalia M Baulina1
1Laboratory of Functional Genomics of Cardiovascular Diseases, National Medical Research Centre of Cardiology Named After E.I. Chazov, Moscow, Russia.
Insights
Genetic testing for hypertrophic cardiomyopathy (HCM) is crucial for personalized treatment. Expanded genetic panels and risk scores, including non-genetic markers, improve patient risk stratification for this inherited cardiac disease.
Area of Science:
- Cardiology
- Genetics
- Molecular Biology
Background:
- Hypertrophic cardiomyopathy (HCM) is a prevalent inherited cardiac condition with significant morbidity and mortality.
- The genetic basis of HCM is complex, varying between individuals and the general population.
- Accurate molecular diagnosis is essential for advancing personalized treatment strategies in the era of gene therapy.
Purpose of the Study:
- To underscore the importance of genetic testing in routine HCM practice.
- To explore the potential of expanded genetic panels, including novel genes and deep intronic variants.
- To discuss the integration of polygenic risk scores and non-genetic markers for enhanced HCM risk stratification.
Main Methods:
- Review of current literature on genetic architecture of HCM.
- Discussion of expanded genetic panel design incorporating core and candidate genes, deep intronic regions, and structural variations.
- Exploration of polygenic risk scores and non-genetic markers (e.g., microRNAs) for risk stratification.
Main Results:
- Genetic testing is fundamental for personalized HCM management.
- Expanded genetic panels offer a more comprehensive diagnostic approach.
- Combining genetic data with non-genetic factors like microRNAs can improve risk assessment.
Conclusions:
- Detailed molecular diagnostics, including expanded genetic panels and risk scores, are vital for personalized hypertrophic cardiomyopathy treatment.
- Integrating genetic and non-genetic markers enhances the stratification of HCM risk in diverse populations.
- The principles discussed for HCM are applicable to other cardiomyopathies.
Abstract:
Hypertrophic cardiomyopathy (HCM) is the most common inherited cardiac disease associated with morbidity and mortality at any age. As studies in recent decades have shown, the genetic architecture of HCM is quite complex both in the entire population and in each patient. In the rapidly advancing era of gene therapy, we have to provide a detailed molecular diagnosis to our patients to give them the chance for better and more personalized treatment. In addition to emphasizing the importance of genetic testing in routine practice, this review aims to discuss the possibility to go a step further and create an expanded genetic panel that contains not only variants in core genes but also new candidate genes, including those located in deep intron regions, as well as structural variations. It also highlights the benefits of calculating polygenic risk scores based on a combination of rare and common genetic variants for each patient and of using non-genetic HCM markers, such as microRNAs that can enhance stratification of risk for HCM in unselected populations alongside rare genetic variants and clinical factors. While this review is focusing on HCM, the discussed issues are relevant to other cardiomyopathies.
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