DEV2011 Lecture Notes - Angiogenesis Inhibitor, Vasculogenesis, Endothelium
Document Summary
Angiogenesis is the physiological process through which new blood vessels form from pre-existing vessels. Angiogenesis is a normal and vital process in growth and development, as well as in wound healing and in the formation of granulation tissue. However, it is also a fundamental step in the transition of tumors from a benign state to a malignant one, leading to the use of angiogenesis inhibitors in the treatment of cancer. Vasculogenesis is the process of blood vessel formation occurring by a de novo production of endothelial cells. Vasculogenesis occurs during embryologic development of the circulatory system. For example, if a monolayer of endothelial cells begins sprouting to form capillaries, angiogenesis is occurring. Vasculogenesis, in contrast, is when endothelial precursor cells (angioblasts) migrate and differentiate in response to local cues (such as growth factors and extracellular matrix) to form new blood vessels. These vascular trees are then pruned and extended through angiogenesis.
