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- W2038963002 abstract "Angiogenesis depends on growth factors and vascular cell adhesion events. Integrins and growth factors are capable of activating the ras/MAP kinase pathway in vitro, yet how these signals influence endothelial cells during angiogenesis is unknown. Upon initiation of angiogenesis with basic fibroblast growth factor (bFGF) on the chick chorioallantoic membrane (CAM), endothelial cell mitogen-activated protein (MAP) kinase (ERK) activity was detected as early as 5 min yet was sustained for at least 20 h. The initial wave of ERK activity (5-120 min) was refractory to integrin antagonists, whereas the sustained activity (4-20 h) depended on integrin alphavbeta3, but not beta1 integrins. Inhibition of MAP kinase kinase (MEK) during this sustained alphavbeta3-dependent ERK signal blocked the formation of new blood vessels while not influencing preexisting blood vessels on the CAM. Inhibition of MEK also blocked growth factor induced migration but not adhesion of endothelial cells in vitro. Therefore, angiogenesis depends on sustained ERK activity regulated by the ligation state of both a growth factor receptor and integrin alphavbeta3." @default.
- W2038963002 created "2016-06-24" @default.
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- W2038963002 date "1998-03-09" @default.
- W2038963002 modified "2023-10-10" @default.
- W2038963002 title "Integrin αvβ3 Requirement for Sustained Mitogen-activated Protein Kinase Activity during Angiogenesis" @default.
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- W2038963002 doi "https://doi.org/10.1083/jcb.140.5.1255" @default.
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