AUG 21, 2013 12:00 PM PDT

Genetics of Coronary Artery Disease

C.E. Credits: CE
Speaker

Abstract

Susceptibility to coronary artery disease (CAD) is claimed to be 40% to 60% inherited, but until recently genetic risk factors predisposing to CAD have been elusive. Comprehensive prevention of CAD requires manipulation of genetic risk. The availability of microarrays of single-nucleotide polymorphisms enabling genome-wide association studies (GWAS) led to the discovery of 50 genetic risk variants for CAD. Surprisingly, 35 risk variants mediate their risk through unknown mechanisms, with only 17 associating with hypertension or lipids. Thus, there are several mechanisms contributing to the pathogenesis of CAD yet to be elucidated. The first risk variant discovered by GWAS was 9p21.3, which occurs in 75% of all populations except African, with a mean increased risk of 25% per copy. Of the 50 variants for CAD, the increased risk varies from 6% to 92% with a mean increased risk of 18%, occurring on average in 47% of the population. The maximum number of risk alleles per individual would be 100. In the CARDIoGRAM (Coronary Artery Disease Genome-wide Replication and Meta Analysis) study of 23 variants, the average per individual was 17, the minimum 7, and the maximum 37. The top 10th percentile has an odds ratio of 1.88 and the lowest percentile an odds ratio of 0.55. Routine genetic screening is unlikely until management is improved by genetic testing. Risk variants should provide pathophysiological insights and targets for novel therapy. While risk variants are less potent predictors of CAD, compared with biomarkers, they have the advantage of not changing in one's lifetime and are unaffected by diet, sex, age, or medication.


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AUG 21, 2013 12:00 PM PDT

Genetics of Coronary Artery Disease

C.E. Credits: CE

Specialty

Internal Medicine

Biomarkers

Interventional Cardiology

Medicine

Molecular Biology

Human Behavior

Genomics

Nursing Home Care

Clinical Chemistry

Psychiatry

Biotechnology

Health

Heart Disease

Molecular Diagnostics

Cardiology

Geography

Asia100%

Registration Source

Website Visitors100%

Job Title

Student33%

Medical Doctor/Specialist33%

Medical Laboratory Technician33%

Organization

Medical School33%

Hospital33%

Academic Institution33%


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