Molecular studies in familial dilated cardiomyopathy - A pilot study

Area of Science:

• Cardiovascular Genetics
• Molecular Cardiology
• Genetic Medicine

Background:

• Familial dilated cardiomyopathy (FDC) is a significant cause of heart failure.
• Identifying genetic underpinnings is crucial for diagnosis and management.
• Previous studies highlight the heterogeneity of genetic causes in FDC.

Purpose of the Study:

• To investigate the spectrum of genetic variants in patients diagnosed with familial dilated cardiomyopathy.
• To determine the prevalence of pathogenic variants in a cohort of FDC patients.
• To identify common genes associated with FDC in the studied population.

Main Methods:

• A pilot study included 20 patients meeting diagnostic criteria for FDC.
• Exclusion of secondary causes of dilated cardiomyopathy was performed.
• Next-generation sequencing (NGS) was employed to analyze blood samples for genetic variants.

Main Results:

• Pathogenic variants were detected in 70% of the FDC patients (14 out of 20).
• A total of 16 different pathogenic variants were identified.
• The most frequently implicated genes were Titin, Filamin, Lamin, and Desmosomal genes, with sarcomeric mutations accounting for 32%.

Conclusions:

• Next-generation sequencing is a valuable tool for identifying genetic variants in familial dilated cardiomyopathy.
• Titin gene mutations are a primary cause of FDC in this cohort.
• Cascade testing in first-degree relatives of affected individuals is recommended for early detection and monitoring.