A genetic basis for coronary artery disease

Area of Science:

• Cardiovascular Medicine
• Genetics
• Preventive Cardiology

Background:

• Coronary artery disease (CAD) and cancer are leading global causes of death.
• CAD is largely preventable by modifying risk factors like cholesterol, reducing morbidity and mortality by 40-60%.

Purpose of the Study:

• To explore the role of genetic factors in CAD pathogenesis and prevention.
• To identify novel therapeutic targets for CAD based on genetic discoveries.

Main Methods:

• Genome-wide association studies (GWAS) involving over 200,000 participants to identify CAD risk variants.
• Analysis of 157 genetic variants regulating plasma lipids (LDL-C, HDL-C, triglycerides, total cholesterol).
• Mendelian randomization studies to assess the causal effect of genetic variants on CAD.

Main Results:

• Over 50 genetic risk variants for CAD have been identified, with only 15 acting through known risk factors.
• Genes regulating plasma triglycerides are strongly associated with CAD pathogenesis.
• Mendelian randomization suggests no protective effect from genes increasing HDL cholesterol, challenging current beliefs.

Conclusions:

• CAD pathogenesis involves factors beyond traditional risk factors like cholesterol.
• Genetic discoveries are paving the way for novel CAD prevention therapies.
• Targeting PCSK9 shows promise, with a new drug in phase 3 trials demonstrating high efficacy and safety for CAD prevention.