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• W2097035877 abstract "We have previously shown that leaky junctions associated with dying or dividing cells are the dominant pathway for low density lipoprotein (LDL) transport under convective conditions, accounting for more than 90% of the transport [Cancel LM, Fitting A, Tarbell JM. In vitro study of LDL transport under pressurized (convective) conditions. Am J Physiol Heart Circ Physiol 2007;293:H126–32]. To explore the role of apoptosis in the leaky junction pathway, TNFα and cycloheximide (TNFα/CHX) were used to induce an elevated rate of apoptosis in cultured bovine aortic endothelial cell (BAEC) monolayers and the convective fluxes of LDL and water were measured. Treatment with TNFα/CHX induced a 18.3-fold increase in apoptosis and a 4.4-fold increase in LDL permeability. Increases in apoptosis and permeability were attenuated by treatment with the caspase inhibitor Z-VAD-FMK. Water flux increased by 2.7-fold after treatment with TNFα/CHX, and this increase was not attenuated by treatment with Z-VAD-FMK. Immunostaining of the tight junction protein ZO-1 showed that TNFα/CHX treatment disrupts the tight junction in addition to inducing apoptosis. This disruption is present even when Z-VAD-FMK is used to inhibit apoptosis, and likely accounts for the increase in water flux. We found a strong correlation between the rate of apoptosis and the permeability of BAEC monolayers to LDL. These results demonstrate the potential of manipulating endothelial monolayer permeability by altering the rate of apoptosis pharmacollogicaly. This has implications for the treatment of atherosclerosis." @default.
• W2097035877 created "2016-06-24" @default.
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• W2097035877 date "2010-02-01" @default.
• W2097035877 modified "2023-09-29" @default.
• W2097035877 title "The role of apoptosis in LDL transport through cultured endothelial cell monolayers" @default.
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• W2097035877 doi "https://doi.org/10.1016/j.atherosclerosis.2009.07.051" @default.
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