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calmodulin/nécrose
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Calcium/calmodulin-dependent protein kinase II (CaMKII) regulates tumour necrosis factor-related apoptosis inducing ligand (TRAIL)-mediated apoptosis of fibroblast-like synovial cells (FLS) by phosphorylation of Akt.
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OBJECTIVE
We tried to determine whether calcium/calmodulin-dependent protein kinase II (CaMKII) regulates tumour necrosis factor-related apoptosis inducing ligand (TRAIL)-mediated apoptosis of fibroblast-like synovial cells (FLS).
METHODS
CaMKII expression in FLS was studied by both western blotting
Large T-antigen up-regulates Kv4.3 K⁺ channels through Sp1, and Kv4.3 K⁺ channels contribute to cell apoptosis and necrosis through activation of calcium/calmodulin-dependent protein kinase II.
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Down-regulation of Kv4.3 K⁺ channels commonly occurs in multiple diseases, but the understanding of the regulation of Kv4.3 K⁺ channels and the role of Kv4.3 K⁺ channels in pathological conditions are limited. HEK (human embryonic kidney)-293T cells are derived from HEK-293 cells which are
Distinct role of calmodulin and calmodulin-dependent protein kinase-II in lipopolysaccharide and tumor necrosis factor-alpha-mediated suppression of apoptosis and antiapoptotic c-IAP2 gene expression in human monocytic cells.
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Exposure of phagocytic cells to bacterial endotoxin (lipopolysaccharide; LPS) or inflammatory cytokines confers antiapoptotic survival signals; however, in the absence of the appropriate stimulus, monocytes are programmed to undergo apoptosis. Macrophage survival may thus influence inflammatory and
Endothelial cells and extracellular calmodulin inhibit monocyte tumor necrosis factor release and augment neutrophil elastase release.
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Cultured human umbilical vein endothelial cells inhibited tumor necrosis factor-alpha release from whole blood or isolated mononuclear cells exposed to endotoxin. In contrast, the endothelial cells augmented neutrophil elastase release in the same blood. A protein with these functional properties
Stimulatory effect of 1 alpha,25-dihydroxyvitamin D3 on mouse alveolar macrophage tumor necrosis factor-alpha production in vitro: involvement of protein kinase C and Ca2+/calmodulin-dependent kinase.
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1 alpha,25-Dihydroxyvitamin D3 [1 alpha,25(OH)2D3, calcitriol] has been shown to modulate the immune function of peripheral monocytes and peritoneal macrophages. However, its effect on alveolar macrophage (AM) cytokine secretion has not been reported. We therefore investigated the influence of
Recombinant human tumor necrosis factor alpha induces calcium oscillation and calcium-activated chloride current in human neutrophils. The role of calcium/calmodulin-dependent protein kinase.
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The role of calcium in the action of tumor necrosis factor (TNF) on human neutrophils is not clear. With fluorescent cytometry, using the visible wavelength calcium probe, fluo-3, and patch clamping, we investigated whether TNF induces cytosolic free Ca2+ changes and Ca(2+)-activated Cl- current,
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
Stimulation of free radical generation in human leukocytes by various agents including tumor necrosis factor is a calmodulin dependent process.
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The mechanism(s) involved in the generation of free radicals in human leukocytes by phorbol myristate acetate (PMA), formyl-methionyl-leucyl-phenylalanine (FMP), lipopolysaccharide (LPS), arachidonic acid (AA), and recombinant-tumor necrosis factor-1-alpha (r-TNF-1 alpha) was investigated.
Calcium and calmodulin regulate lipopolysaccharide-induced alveolar macrophage production of tumor necrosis factor and procoagulant activity.
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BACKGROUND
Alterations in macrophage (M phi) function are responsible, in part, for adult respiratory distress syndrome and multiple organ failure developing in patients with sepsis. Elucidation and control of these M phi mechanisms during sepsis are crucial to our understanding of this disease and,
[Inhibitory effects of protein kinase C inhibitor and calmodulin antagonist on tumor necrosis factor production by mouse macrophages].
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Mouse peritoneal macrophages were primed with calcium ionophore calcimycin 1 mumol.L-1 for 8 h and then elicited by lipopolysaccharides (LPS, 10 ng.ml-1) for 6 h to induce tumor necrosis factor (TNF), measured by crystal violet staining assay using murine fibroblast L929 cells. Protein kinase C
Differential involvement of calmodulin-dependent protein kinase II-activated AP-1 and c-Jun N-terminal kinase-activated EGR-1 signaling pathways in tumor necrosis factor-alpha and lipopolysaccharide-induced CD44 expression in human monocytic cells.
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CD44 plays a crucial role in cell migration, inflammation, and immune responses. Alteration in the levels of CD44 expression on monocytic cells by endotoxins and immunoregulatory cytokines may modulate the migration of immune cells to inflammatory sites and the development of immune responses.
Involvement of calmodulin and calmodulin kinase II in tumor necrosis factor alpha-induced survival of bone marrow derived macrophages.
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We previously showed that survival signaling in TNFα-treated, human THP1-derived macrophages (TDMs) has an obligatory requirement for constitutive Ca(2+) influx through a mechanism involving calmodulin/calmodulin kinase II (CAM/CAMKII). We also demonstrated that such requirement also applies to the
Distinct role of calmodulin and calmodulin-dependent protein kinase-II in lipopolysaccharide and tumor necrosis factor-α-mediated suppression of apoptosis and antiapoptotic c-IAP2 gene expression in human monocytic cells.
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The inflammatory cytokines tumor necrosis factor alpha and interleukin-1beta stimulate phosphatidylcholine secretion in primary cultures of rat type II pneumocytes.
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Tumor necrosis factor alpha and interleukin-1beta increase surfactant secretion in type II pneumocytes in a time- and dose-dependent manner. This stimulatory effect was additive to that of lipopolysaccharide, suggesting that cytokines and lipopolysaccharide may exert their actions through different
Late protective effects of the anticalmodulin drug fluphenazine on carbon tetrachloride-induced liver necrosis.
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Fluphenazine (FP) treatment (50 mg/kg bw, ip in saline) 30 min before or 6 or 10 h after CCl4 administration (1 ml/kg ip in olive oil) significantly prevented the liver necrosis produced by the hepatotoxin at 24 h. FP had enhancing effects on the covalent binding of CCl4 reactive metabolites to
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