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- W2073852020 abstract "A cell culture model suitable for studies of dengue haemorrhagic fever was developed, based on culture of primary human umbilical vein endothelial cells (HUVECs) on a permeable membrane. By electron microscopy, cultured HUVECs at day 11 resembled morphologically microvascular endothelium. Endothelial barrier function was assessed by measuring transendothelial flux of albumin. Instead of using a labelled tracer molecule, an enzyme-linked immunosorbent assay (ELISA) was developed to measure concentrations of native human albumin. The permeability characteristics of the HUVEC monolayer were found to be improved significantly (approximately 1 log reduction in permeability coefficient for albumin) by culturing HUVECs in human serum rather than fetal calf serum. Permeability coefficients for albumin in the range 1-4 x 10(-7) cm/s were achieved, which is an improvement on previous in vitro models of the endothelial barrier. Comparison of transendothelial flux of albumin and urea provided evidence of molecular sieving by the HUVEC monolayer. Moreover, tumour necrosis factor-alpha induced a dose-dependent, reversible increase in permeability of the HUVEC monolayer. This endothelial barrier model thus has many important characteristics that resembled human microvascular endothelium and is an improvement on the previous model proposed for studies of dengue haemorrhagic fever." @default.
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- W2073852020 date "2002-07-01" @default.
- W2073852020 modified "2023-09-27" @default.
- W2073852020 title "An improved endothelial barrier model to investigate dengue haemorrhagic fever" @default.
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- W2073852020 doi "https://doi.org/10.1016/s0166-0934(02)00065-4" @default.
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