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- W2022690299 abstract "Angiogenesis consists of endothelial cell proliferation, migration and tube formation. It is useful to investigate endothelial cell behavior using immortalized endothelial cell lines. We characterized cell growth property, growth factor dependency and response to angioinhibitory drugs; TNP-470, staurosporine, radicicol and genistein, using human umbilical vein endothelial cells (HUVECs) immortalized by human papilloma virus (HPV)-16 E6-E7, named HUVECs/E6-E7, and HUVECs/E6-E7 transformed by v-Ki-ras gene, named HUVECs/E6-E7/ras. The dependency to vascular endothelial cell growth factor (VEGF) and basic fibroblast growth factor (bFGF) for cell proliferation decreased in HUVECs/E6-E7, but were restored in HUVECs/E6-E7/ras. Flow cytometric analysis demonstrated that a VEGF receptor KDR/flk-1 was down-regulated in HUVECs/E6-E7 but not in HUVECs/E6-E7/ras. Expression of another VEGF receptor flt-1 was consistent in all cells including HUVECs, HUVECs/E6-E7 and HUVECs/E6-E7/ras. According to the analysis of the angioinhibitory drugs, HUVECs/E6-E7 was obviously resistant to TNP-470, but HUVECs/E6-E7/ras showed similar response compared to HUVECs which suggests that v-Ki-ras signaling pathway is associated with VEGF receptor expression and make HUVECs/E6-E7 sensitive to TNP-470 by modulating the signal transduction cascade. In conclusion, HPV-16 E6-E7 and v-Ki-ras genes have unique growth properties and these immortalized cells are useful for investigating signal transduction pathways of endothelial cells, and for screening of angioinhibitory drugs." @default.
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- W2022690299 date "2000-09-01" @default.
- W2022690299 modified "2023-09-27" @default.
- W2022690299 title "Differential behavior of VEGF receptor expression and response to TNP-470 in two immortalized human endothelial cell lines." @default.
- W2022690299 doi "https://doi.org/10.3892/ijo.17.3.525" @default.
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