How shifting muscle cells in arteries may drive coronary disease risk

A new study has uncovered how changes in vascular smooth muscle cells (VSMCs) affect the risk of coronary artery disease (CAD). Published in Nature Communications, the research reveals that these cells, once thought to be passive, actively shift between different states—some of which worsen inflammation and plaque instability.

Scientists used computational modelling to track how VSMCs transition between contractile and synthetic states during disease progression. Key transcription factors, such as KLF4 and myocardin, act as molecular switches controlling these shifts. When cells move toward pro-inflammatory forms, they accelerate vascular damage and raise CAD risk.

The study also found that epigenetic changes, like altered histone acetylation, lock cells into harmful states. These transitions overlap with known genetic risk factors for CAD, with 33 previously studied loci linked to VSMC behaviour. Some of these loci have already been explored as potential drug targets in clinical trials. To confirm their findings, researchers tested the results in living models. The experiments supported the idea that targeting VSMC transitions could offer new ways to treat or prevent coronary disease.

The research highlights how dynamic VSMC states directly influence coronary pathology. By mapping these cellular shifts, scientists have identified potential therapeutic targets—including 33 genetic loci already under investigation. This could lead to more precise treatments for reducing CAD risk in the future.