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- W2151641570 abstract "Brain injury in hemolytic-uremic syndrome (HUS) may be enhanced by inflammatory cytokine up-regulation of endothelial cell sensitivity to shigatoxin (Stx). The present study investigated whether inflammatory cytokine up-regulation of Stx toxicity could be ameliorated by inhibiting candidate signal transduction pathways. Exposure of human brain endothelial cells (HBECs) to tumor necrosis factor (TNF) greatly increased Stx-1 and Stx-2 cytotoxicity; this was reduced by inhibition of p38 mitogen-activated protein kinase (MAPK), but not c-Jun kinase. SB203580, a specific inhibitor of p38 MAPK, reduced TNF-stimulated Stx cytotoxicity in HBECs, TNF-stimulated 125Stx-1 binding to intact HBECs, the cellular content of Gb3 (galactose α 1,4, galactose β 1,4, glucose-ceramide) (the Stx receptor), and TNF-stimulated Gb3 synthase and glucosylceramide synthase activities but did not affect lactosylceramide synthase activities or mRNA content. Thus, inhibition of p38 MAPK substantially reduces inflammatory cytokine up-regulation of Stx-receptor synthesis and cell-surface expression, thereby decreasing Stx cytotoxicity. Inhibition of p38 MAPK may be of therapeutic benefit in HUS." @default.
- W2151641570 created "2016-06-24" @default.
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- W2151641570 date "2005-02-01" @default.
- W2151641570 modified "2023-09-26" @default.
- W2151641570 title "Inhibition of p38 Mitogen‐Activated Protein Kinase Ameliorates Cytokine Up‐Regulated Shigatoxin‐1 Toxicity in Human Brain Microvascular Endothelial Cells" @default.
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- W2151641570 doi "https://doi.org/10.1086/427188" @default.
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