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thapsigargin/necrosis
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Pagina 1 a partire dal 162 risultati
Overexpression of regucalcin suppresses cell death in cloned rat hepatoma H4-II-E cells induced by tumor necrosis factor-alpha or thapsigargin.
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The role of regucalcin, which is a regulatory protein in intracellular signaling pathway, in the regulation of cell death was investigated by using the cloned rat hepatoma H4-II-E cells overexpressing regucalcin. The hepatoma cells (wild-type) and stable regucalcin (RC)/pCXN2 transfectants were
Activation of p55 tumor necrosis factor-alpha receptor-1 coupled to tumor necrosis factor receptor-associated factor 2 stimulates intercellular adhesion molecule-1 expression by modulating a thapsigargin-sensitive pathway in human tracheal smooth muscle cells.
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Tumor necrosis factor-alpha (TNFalpha) stimulates the expression of intercellular adhesion molecule-1 (ICAM-1) by activating the transcription factor nuclear factor-kappaB (NF-kappaB) in human airway smooth muscle (ASM) cells. This study characterizes the receptor involved as well as critical
Effect of tetrandrine on calcium-dependent tumour necrosis factor-alpha production in glia-neurone mixed cultures.
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Tumour necrosis factor-alpha is believed to have a deleterious role in the pathophysiology of brain injury. Tetrandrine has protective effect on neuronal cells, however, the mechanisms involved in its action have not been clearly established. The aim of this study was to investigate the role of
Inhibition of the ER Ca2+ pump forces multidrug-resistant cells deficient in Bak and Bax into necrosis.
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Tumor cells deficient in the proapoptotic proteins Bak and Bax are resistant to chemotherapeutic drugs. Here, we demonstrate that murine embryonic fibroblasts deficient for both Bak and Bax are, however, efficiently killed by thapsigargin, a specific inhibitor of ER Ca(2+) pumps that induces ER
Specific induction of RGS16 (regulator of G-protein signalling 16) mRNA by protein kinase C in CEM leukaemia cells is mediated via tumour necrosis factor alpha in a calcium-sensitive manner.
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The RGS (regulator of G-protein signalling) proteins are GTPase-activating proteins for activated Galpha subunits. We investigated the effects of protein kinase C (PKC) on RGS proteins in various T cell lines by treating them with PMA. mRNA levels of both RGS16 and tumour necrosis factor alpha
Tumor necrosis factor alpha protects heart cultures against hypoxic damage via activation of PKA and phospholamban to prevent calcium overload.
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This study aims to elucidate the mechanisms by which tumor necrosis factor alpha (TNFα) provides protection from hypoxic damage to neonatal rat cardiomyocyte cultures. We show that when intracellular Ca(2+) ([Ca(2+)]i) levels are elevated by extracellular Ca(2+) ([Ca(2+)]o) or by hypoxia, then TNFα
Ammonium triggers calcium elevation in cultured mouse microglial cells by initiating Ca(2+) release from thapsigargin-sensitive intracellular stores.
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Microglial cells are thought to serve as sensors for pathologic events in the brain. In the present study we demonstrate that these cells respond with an increase in intracellular calcium concentration ([Ca2+]i) to intracellular alkaline shifts induced by either application of NH3/NH4+ or by an
Inhibition of tumor necrosis factor-alpha production by SK&F 98625, a CoA-independent transacylase inhibitor, in cultured rat peritoneal macrophages.
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When rat peritoneal macrophages were incubated in medium containing thapsigargin, tumor necrosis factor-alpha (TNF-alpha) production was increased time-dependently. In the presence of SK&F 98625, a CoA-independent transacylase inhibitor, the thapsigargin-induced TNF-alpha production was inhibited
Amplification of prostaglandin I2 production by thapsigargin.
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Rat liver cells (the C-9 cell line) are synergistically stimulated to produce prostaglandin I2 (PGI2) when incubated in the presence of thapsigargin and several recombinant human growth factors or tumor promoters, including basic fibroblast growth factor (bFGF), epidermal growth factor (EGF),
Possible participation of intracellular platelet-activating factor in tumor necrosis factor-alpha production by rat peritoneal macrophages.
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Stimulation of rat peritoneal macrophages by thapsigargin (46.1 nM) increased levels of tumor necrosis factor-alpha and prostaglandin E2 in the conditioned medium. Platelet-activating factor (PAF) was not detected in the conditioned medium, but the level of cell-associated PAF was increased
Lipopolysaccharide sensitizes microglia toward Ca(2+)-induced cell death: mode of cell death shifts from apoptosis to necrosis.
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Little is known about the effect of microglial activation on cell death. This study examines the effects of lipopolysaccharide (LPS) and interferon-gamma (IFN-gamma), triggers of microglial activation, on cell death induced by several agents in cultured rat microglia. For comparison, the effect of
G-protein-coupled receptor agonists differentially regulate basal or tumor necrosis factor-alpha-stimulated activation of interleukin-6 and RANTES in human airway smooth muscle cells.
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Using thapsigargin (Tg), an agent that mobilizes calcium by directly emptying intracellular stores, we previously showed that intracellular calcium may play an important role in the regulation of intercellular adhesion molecule (ICAM)-1 gene expression induced by cytokines in human airway smooth
Involvement of protein kinases in the potentiation of lipopolysaccharide-induced inflammatory mediator formation by thapsigargin in peritoneal macrophages.
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We have explored the regulatory roles played by Ca2+-dependent signaling on lipopolysaccharide (LPS)-induced nitric oxide (NO), prostaglandin E2 (PGE2), tumor necrosis factor alpha (TNF-alpha), and interleukin-6 (IL-6) release in mouse peritoneal macrophages. To elevate intracellular Ca2+, we used
Increased intracellular calcium transients by calmodulin antagonists differentially modulate tumor necrosis factor-alpha-induced E-selectin and ICAM-1 expression.
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We investigated the role of intracellular calcium ([Ca(2+)](i)) in adhesion molecule expression in human umbilical vascular endothelial cells (HUVECs). Calmodulin (CaM) antagonists, W-7, trifluoperazine and chlorpromazine, triggered a rise in [Ca(2+)](i) in HUVECs. In the presence of extracellular
Tumor necrosis factor-alpha, sphingomyelinase, and ceramide inhibit store-operated calcium entry in thyroid FRTL-5 cells.
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Tumor necrosis factor alpha (TNF-alpha) is a potent inhibitor of proliferation in several cell types, including thyroid FRTL-5 cells. As intracellular free calcium ([Ca2+]i) is a major signal in activating proliferation, we investigated the effect of TNF-alpha on calcium fluxes in FRTL-5 cells.
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