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| vasculogenesis ： ウィキペディア英語版 |
vasculogenesis
Vasculogenesis is the process of blood vessel formation occurring by a ''de novo'' production of endothelial cells.
==Process==
Though similar to angiogenesis, the two are different in one aspect: The term angiogenesis denotes the formation of new blood vessels from pre-existing ones, whereas vasculogenesis is the term used for the formation of new blood vessels when there are no pre-existing ones. 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 matrices) to form new blood vessels. These vascular trees are then pruned and extended through angiogenesis.
抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』
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