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7 resultat
Sequence of cardiovascular changes leading to pulmonary edema in swine fed culture material containing fumonisin.
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OBJECTIVE
To determine the sequence of cardiovascular and blood gas changes induced by ingestion of fumonisin-containing culture material in swine and to examine the temporal relationship of these changes to plasma sphinganine and sphingosine concentrations.
METHODS
12 healthy castrated pigs (38 to
TNF-alpha pretreatment prevents subsequent activation of cultured brain cells with TNF-alpha and hypoxia via ceramide.
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We have developed a cellular model in which cultured astrocytes and brain capillary endothelial cells preconditioned with tumor necrosis factor-alpha (TNF-alpha) fail to upregulate intercellular adhesion molecule-1 (ICAM-1) protein (80% inhibition) and mRNA (30% inhibition) when challenged with
Anoxia and reoxygenation of human endothelial cells decrease ceramide glucosyltransferase expression and activates caspases.
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Endothelial oxidative stress induces cellular activation and sometimes death. Endothelial death can occur via necrosis or apoptosis. Understanding the mechanisms involved in cellular activation and death may lead to therapeutics designed to increase death or preserve cellular function. In the
Hypoxia-induced neuronal apoptosis is mediated by de novo synthesis of ceramide through activation of serine palmitoyltransferase.
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Cellular hypoxia can lead to cell death or adaptation and has important effects on development, physiology, and pathology. Here, we investigated the role and regulation of ceramide in hypoxia-induced apoptosis of SH-SY5Y neuroblastoma cells. Hypoxia increased the ceramide concentration;
Ceramide synthase is essential for endonuclease-mediated death of renal tubular epithelial cells induced by hypoxia-reoxygenation.
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Ceramide is known to play a role in the cell signaling pathway involved in apoptosis. Most studies suggest that enhanced ceramide generation is the result of hydrolysis of sphingomyelin by sphingomyelinases. However, the role of ceramide synthase in enhanced ceramide generation has not been
Hypoxic preconditioning protects cultured neurons against hypoxic stress via TNF-alpha and ceramide.
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Brief "preconditioning" ischemia induces ischemic tolerance (IT) and protects the animal brain from subsequent otherwise lethal ischemia. Identification of the signaling steps most proximal to the development of the IT will allow induction of the resistance to ischemia shortly after the onset of
Role of enhanced ceramide generation in DNA damage and cell death in chemical hypoxic injury to LLC-PK1 cells.
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BACKGROUND
Ceramide has been implicated to be a second messenger in the cell signaling pathway involved in cell growth, proliferation, and apoptotic cell death. However, there is little information of a role of ceramide in DNA damage and cell death in hypoxic injury known to induce necrotic cell
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