Genome-Wide Association Study Identifies Functional Variants Associated with Coronary Artery Disease

Strategic Insights -

Current research published in a study from the University of Virginia has made significant progress in understanding the genetic basis of coronary artery disease (CAD). By conducting a comprehensive functional characterization of CAD-associated variants in primary vascular smooth muscle cells (SMCs), the researchers have identified 122 candidate variants with enhancer activity and allelic imbalance, including 23 variants showing condition-biased and 41 showing sex-biased effects. This study sheds light on the intricate mechanisms of CAD and may lead to the development of targeted therapies.

Key Takeaways:

  • Researchers from the University of Virginia conducted a genome-wide association study to identify functional variants associated with CAD risk.
  • The study involved a comprehensive functional characterization of CAD-associated variants in primary vascular smooth muscle cells (SMCs).
  • The researchers identified 122 candidate variants with enhancer activity and allelic imbalance, including 23 variants showing condition-biased and 41 showing sex-biased effects.
  • The study focused on the effects of CAD-associated variants on vascular SMCs and their regulatory effects on nine variant-gene pairs.
  • The researchers prioritized 49 functionally relevant variants through integrating lentiMPRA with CUT&RUN epigenome profiling and expression quantitative trait loci data.
  • CRISPRi experiments confirmed the regulatory effects of eight variants on nine variant-gene pairs, including rs35976034 (MAP1S), rs4888409 (CFDP1), and rs73193808 (MAP3K7CL).
  • The study concluded that the identified variants confer CAD risk through their effects on vascular SMCs.
  • The research highlights the importance of understanding the genetic basis of CAD and may lead to the development of targeted therapies.

Statistics:

  • 122 candidate variants with enhancer activity and allelic imbalance were identified in the study.
  • 23 variants showed condition-biased effects and 41 showed sex-biased effects.
  • 49 functionally relevant variants were prioritized through integrating lentiMPRA with CUT&RUN epigenome profiling and expression quantitative trait loci data.
  • 8 variants were confirmed to have regulatory effects on 9 variant-gene pairs using CRISPRi experiments.
  • 25,892 CAD-associated variants were tested in quiescent and proliferative SMCs using lentivirus-based massively parallel reporter assays (lentiMPRAs).

Sources:

  • University of Virginia
  • Coronary artery disease-associated variants regulate vascular smooth muscle cell gene expression. Nature Cardiovascular Research, 2025.
  • NewsRx. Researchers from University of Virginia Provide Details of New Studies and Findings in the Area of Heart Disease (Coronary artery disease-associated variants regulate vascular smooth muscle cell gene expression). Cardiovascular Week. October 20, 2025; p 154.