Genetic determinants of myocardial dysfunction.

Area of Science:

• Cardiology
• Genetics
• Molecular Biology

Background:

• Heart failure (HF) is a widespread condition with high morbidity and mortality, impacting millions globally.
• HF involves compromised cardiac mechanical function, leading to reduced cardiac output and increased intracardiac pressures.
• The roles of hereditary and genetic factors in HF development, progression, and prognosis require further elucidation.

Purpose of the Study:

• To explore the genetic underpinnings of heart failure (HF).
• To review the contribution of inherited cardiomyopathies to HF.
• To assess the utility of genome-wide association studies (GWAS) in identifying HF-related genetic variants.

Main Methods:

• Review of existing literature on HF genetics and pathophysiology.
• Analysis of studies investigating genetic mutations in cardiomyopathies (dilated, hypertrophic, metabolic, mitochondrial).
• Examination of findings from genome-wide association studies (GWAS) focused on HF risk factors.

Main Results:

• Autosomal dominant inherited cardiomyopathies, often caused by mutations in sarcomeric protein genes, are major contributors to HF.
• Metabolic and mitochondrial cardiomyopathies, stemming from mutations affecting cardiomyocyte energy balance, also trigger HF.
• GWAS have identified single nucleotide polymorphisms (SNPs) associated with HF risk, though challenges remain in comprehensive genetic profiling.

Conclusions:

• Genetic factors, especially mutations in genes encoding cardiac sarcomere and metabolic proteins, are crucial in HF pathogenesis.
• While GWAS have yielded insights, a deeper understanding of HF's genetic architecture is needed.
• Further research into the genetic and pathophysiological basis of HF is essential for developing effective therapeutic strategies, including gene therapy.