The angiogenic switch, which leads to the activation of endothelial cell proliferation and the growth of new blood vessels, is a crucial step in tumorigenesis. A study now shows that this process is linked to a microRNA in endothelial cells (909–914). Blocking microRNAs may offer new avenues for antiangiogenesis therapy to treat cancer.
- Hanna M Eilken
- Ralf H Adams