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- W2002472340 abstract "Endotoxin not only activates the Toll-mediated signaling pathway within endothelial cells that leads to neutrophil migration but also causes the polymerization of microtubules. The potential role of this polymerization event, however, is unknown.Human umbilical vein endothelial cells stimulated with endotoxin were pretreated with or without the microtubule depolymerizing agent colchicine. Toll-mediated signaling events and protein production were in turn investigated by Western blot, gel shift, and enzyme-linked immunosorbent assay. Finally, neutrophil adhesion was assayed fluorometrically under the various conditions.Endotoxin led to activation of the various Toll-mediated pathways, production of intercellular adhesion molecule-1 and interleukin-8, and subsequent neutrophil adhesion. Pretreatment with colchicine led to selective inhibition of anti-dual phosphorylated extracellular signal-regulated kinase-1/2, anti-dual phosphorylated c-jun N-terminal kinase, and adaptor protein-1; selective enhancement of p38; and no effect on nuclear factor-kappaB. This selective modulation of intracellular signaling resulted in attenuated intercellular adhesion molecule-1, interleukin-8 and prostaglandin E2 production, but enhanced cyclooxygenase-2 expression. As a result, microtubule disruption led to a significant reduction in neutrophil adhesion.Microtubule formation is essential to optimal endotoxin-induced intracellular signaling through anti-dual phosphorylated extracellular signal-regulated kinase-1/2, anti-dual phosphorylated c-jun N-terminal kinase, and adaptor protein-1. Failure of these signaling events is associated with a marked reduction in the formation of a proadhesive phenotype that may prove to be beneficial in modulating neutrophil recruitment during sepsis." @default.
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- W2002472340 date "2003-01-01" @default.
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- W2002472340 title "Modulation of Endotoxin-Induced Endothelial Activity by Microtubule Depolymerization" @default.
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- W2002472340 doi "https://doi.org/10.1097/00005373-200301000-00013" @default.
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