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- W2106865013 abstract "Addition of micromolar concentrations of 4-hydroxynonenal (4-HNE), a reactive end-product of lipid peroxidation, to isolated rat hepatocytes was found to cause an early and transient increase in cytosolic Ca2+ concentration followed by a more pronounced and progressive elevation. Such a late effect of 4-HNE was prevented by chelation of extracellular Ca2+ with EGTA or by the addition of GdCl3, which is known to block the activity of store operated Ca2+ channels in the hepatocyte plasma membrane. Moreover, the preincubation of isolated hepatocytes with the phospholipase C inhibitor U73122 resulted in a complete inhibition of both the early increase of cytosolic Ca2+ and the subsequent Ca2+ inflow. When 4-HNE was added to the hepatocytes 5 min after the emptying of intracellular Ca2+ pools by thapsigargin, the aldehyde caused a further increase in the accumulation of Ca2+ which was prevented in the presence of GdCl3. Taken together these results indicate that in hepatocytes 4-HNE causes Ca2+ inflow across GdCl3-sensitive Ca2+ channels. The mechanism responsible for such an effect is triggered by the emptying of intracellular Ca2+ pools likely resulting from 4-HNE mediated stimulation of phospholypase C, but 4-HNE also appears to interfere with the channel protein(s) or with the mechanism(s) regulating capacitative Ca2+ inflow." @default.
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- W2106865013 date "1996-01-01" @default.
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- W2106865013 title "4-Hydroxynonenal Triggers Ca2+Influx in Isolated Rat Hepatocytes" @default.
- W2106865013 doi "https://doi.org/10.1006/bbrc.1996.0137" @default.
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