MYH7 Gene-Related Mutation p.V878L Identified in a Chinese Family with Hypertrophic Cardiomyopathy

Area of Science:

• Cardiovascular Genetics
• Molecular Cardiology
• Genomics

Background:

• Hypertrophic cardiomyopathy (HCM) is a common inherited cardiovascular disease with a significant risk of sudden cardiac death.
• The genetic basis for many HCM cases remains unidentified, despite over 20 associated genes.
• Understanding the genetic architecture of HCM is crucial for diagnosis and risk stratification.

Purpose of the Study:

• To identify the genetic cause of HCM in a Chinese family with a history of the disease and sudden cardiac death.
• To characterize a novel MYH7 gene mutation associated with hypertrophic cardiomyopathy.
• To investigate the inheritance pattern and pathogenicity of the identified genetic variant.

Main Methods:

• Genetic analysis using next-generation sequencing (NGS) on affected and unaffected family members.
• Clinical evaluation, including family history and assessment of cardiac structure.
• Bioinformatics analysis and sequence alignment to predict the impact of the mutation.

Main Results:

• A heterozygous missense mutation, c.2632C>A (p.V878L), in the MYH7 gene was identified in affected individuals.
• The mutation followed an autosomal dominant inheritance pattern and was absent in unaffected family members.
• Bioinformatics predicted the mutation as damaging and disease-causing, located in a conserved region of MYH7.

Conclusions:

• The identified MYH7 c.2632C>A (p.V878L) mutation is potentially pathogenic and associated with hypertrophic cardiomyopathy.
• This discovery expands the spectrum of MYH7 gene mutations linked to HCM.
• The findings contribute to a better understanding of the genetic heterogeneity of hypertrophic cardiomyopathy.