Large-scale genome-wide analysis identifies genetic variants associated with cardiac structure and function.

Area of Science:

• Cardiovascular Genetics
• Human Genetics
• Genomics

Background:

• Understanding genetic factors is key to preventing and treating heart disease.
• Individual differences in cardiac structure and function have a genetic basis.
• Identifying these genetic variations is crucial for advancing cardiovascular medicine.

Purpose of the Study:

• To identify common genetic variations associated with inter-individual variability in cardiac structure and function.
• To expand the knowledge of the genetic architecture of the heart.
• To provide targets for future functional studies and potential therapeutic interventions.

Main Methods:

• Genome-Wide Association Study (GWAS) meta-analysis of echocardiographic traits.
• Involved 46,533 individuals from 30 studies (EchoGen consortium).
• Analyzed 16 traits of left ventricular (LV) structure, and systolic and diastolic function.

Main Results:

• Identified 10 novel genome-wide significant single nucleotide polymorphisms (SNPs) associated with cardiac traits.
• These include SNPs near genes like MTSS1, ATXN2, KCNRG, CACNA1C, and others.
• Findings were validated in independent cohorts and associated with signaling pathways and gene expression in relevant tissues.

Conclusions:

• This large meta-analysis identified additional genetic loci influencing cardiac structure and function.
• These discoveries offer new insights into the genetic underpinnings of cardiac traits.
• The identified loci warrant further functional investigation to elucidate their precise roles.