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- W2000779551 abstract "Renal tubular cell apoptosis is a significant component of obstruction-induced renal injury, and it results in a progressive loss in renal parenchymal mass during renal obstruction. Although IL-18 is an important mediator of inflammatory renal disease and renal fibrosis, its role in obstruction-induced renal tubular cell apoptosis remains unclear. To study this, male C57BL6 wild-type mice and C57BL6 mice transgenic for human IL-18-binding protein (IL-18BP Tg) were subjected to renal obstruction vs. sham operation. The kidneys were harvested after 1 or 2 wk and analyzed for IL-18 production, apoptosis, caspase activity, and Fas/Fas Ligand (FasL) expression. HK-2 cells were similarly analyzed for apoptosis and proapoptotic signaling following 3 days of direct exposure to IL-18 vs. control media. Renal obstruction induced a significant increase in IL-18 production, renal tubular cell apoptosis, caspase activation, and FasL expression. IL-18 neutralization, on the other hand, significantly reduced obstruction-induced apoptosis, caspase-8 and caspase-3 activity, and FasL expression. In vitro experiments similarly demonstrate that IL-18 stimulation induces apoptosis, FasL expression, and increases active caspase-8 and caspase-3 expression in a dose-dependent fashion. siRNA knockdown of FasL gene expression, however, significantly reduced IL-18-induced apoptosis. This study reveals that IL-18 is a significant mediator of obstruction-induced tubular cell apoptosis, and it demonstrates that IL-18 stimulates proapoptotic signaling through a FasL-dependent mechanism." @default.
- W2000779551 created "2016-06-24" @default.
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- W2000779551 date "2011-07-01" @default.
- W2000779551 modified "2023-09-26" @default.
- W2000779551 title "IL-18 mediates proapoptotic signaling in renal tubular cells through a Fas ligand-dependent mechanism" @default.
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- W2000779551 doi "https://doi.org/10.1152/ajprenal.00339.2010" @default.
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