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Updated: Sep 13, 2025

Investigating the Pathogenesis of MYH7 Mutation Gly823Glu in Familial Hypertrophic Cardiomyopathy using a Mouse Model
Published on: August 8, 2022
From Rare Genetic Variants to Polygenic Risk: Understanding the Genetic Basis of Cardiomyopathies.
Ana Belen Garcia-Ruano1,2, Elena Sola-Garcia1,3, Maria Martin-Istillarty1
1Inherited Cardiac Conditions and Myocardial Diseases Unit, Cardiology Department, University Hospital Jaen, 23007 Jaen, Spain.
Cardiomyopathies are complex heart muscle diseases. Genetic factors range from rare variants to common risk alleles, interacting with lifestyle, influencing disease expression and penetrance.
Area of Science:
- Genetics
- Cardiology
- Genomics
Background:
- Cardiomyopathies are myocardial disorders traditionally classified by phenotype.
- Historically, rare variants in structural genes were thought to cause these conditions.
- Current understanding reveals a more complex genetic basis beyond simple Mendelian inheritance.
Purpose of the Study:
- To explore the evolving genetic architecture of cardiomyopathies.
- To discuss the shift from monogenic to polygenic models.
- To highlight the role of genetic modifiers and environmental factors.
Main Methods:
- Review of current genomic research and literature.
- Analysis of emerging evidence on genetic risk variants.
- Synthesis of findings on incomplete penetrance and polygenic contributions.
Main Results:
- Cardiomyopathies involve a spectrum of genetic risk, including common variants and polygenic contributions.
- Incomplete penetrance is common, influenced by genetic modifiers and environmental factors.
- A continuum of genetic risk better explains disease variability.
Conclusions:
- Understanding the complex genetic basis of cardiomyopathies is crucial.
- This evolving model improves diagnostic accuracy and personalized patient management.
- It aids in refining family screening strategies for cardiomyopathies.
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