Insights into the genetic causes of coronary artery disease and heart attacks

07 Dec 2012

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In the largest genetic study of coronary artery disease (CAD) to date, researchers from the CARDIoGRAMplusC4D Consortium report the identification of 15 genetic regions newly associated with the disease, bringing to 46 the number of regions associated with CAD risk.

The team identified a further 104 independent genetic variants that are very likely to be associated with the disease, enhancing our knowledge of the genetic component that causes CAD.

They used their discoveries to identify biological pathways that underlie the disease and showed that lipid metabolism and inflammation play a significant role in CAD.

CAD and its main complication myocardial infarction (heart attack) are one of the most common causes of death in the world and approximately one in five men and one in seven women die from the disease in the UK. CAD has a strong inherited basis.

"Our research strengthens the argument that, for most of us, genetic risk to CAD is defined by many genetic variants, each of which has a modest affect," says Dr Panos Deloukas, co-lead author from the Wellcome Trust Sanger Institute. "We went beyond traditional genetic association studies to explore likely genetic signals associated with the disease and to use the information to identify biological pathways underlying CAD.

"Our next step is to design new analyses to also test rarer variants to provide a full catalogue of disease associations that in the future, could identify individuals most at risk of a heart attack."

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