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Pagina 1 a partire dal 103 risultati
Tumor necrosis factor alpha induces spermidine/spermine N1-acetyltransferase through nuclear factor kappaB in non-small cell lung cancer cells.
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Tumor necrosis factor alpha (TNFalpha) is a potent pleiotropic cytokine produced by many cells in response to inflammatory stress. The molecular mechanisms responsible for the multiple biological activities of TNFalpha are due to its ability to activate multiple signal transduction pathways,
Spermine oxidation leads to necrosis with plasma membrane phosphatidylserine redistribution in mouse leukemia cells.
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Oxidation by copper/quinone-containing serum amine oxidases (SAO) is a well-known cause of polyamine cytotoxicity. Spermine oxidation exerts potent immunosuppressive effects in animal cells, but the cell death mechanism involved remains unclear. We compared biochemical and morphological parameters
Tumor necrosis factor-alpha increases reactive oxygen species by inducing spermine oxidase in human lung epithelial cells: a potential mechanism for inflammation-induced carcinogenesis.
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Inflammation has been implicated in the development of many human epithelial cancers, including those of the stomach, lung, colon, and prostate. Tumor necrosis factor-alpha (TNF-alpha) is a potent pleiotropic, proinflammatory cytokine produced by many cells in response to injury and inflammation.
Immunomodulatory action of spermine and spermidine on NR8383 macrophage line in various culture conditions.
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We examined the effect of spermine (SPM) and spermidine (SPD) on tumor necrosis factor (TNF)alpha and monocyte chemoattractant protein-1 (MCP-1) secretion from macrophages in various culture conditions, including several protocols of polyamines addition and media supplemented with 0, 1 or 15% fetal
Spermine-induced maturation in wistar rat intestine: a cytokine-dependent mechanism.
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OBJECTIVE
Polyamines are of great importance in biologic processes such as cell proliferation and differentiation. The ingestion of spermidine or spermine by suckling rats induces the precocious maturation of the small intestine. In a previous article, the authors hypothesized that this phenomenon
Regulation of spermidine/spermine N1-acetyltransferase expression by cytokines and polyamines in human hepatocarcinoma cells (HepG2).
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Spermidine/spermine N1-acetyltransferase (cSAT), a key enzyme in polyamine degradation, is induced by various hepatotoxins and liver tumor promoters. In this paper we demonstrate that physiological factors, such as cytokines, control cSAT expression in HepG2 human hepatocarcinoma cells. Hepatocyte
Expression of polyamine and SSAT (spermidine/spermine N-1 acetyl transferase) levels following surgical trauma and sepsis.
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Polyamines have counterregulatory effects against inflammation, and whole blood polyamine concentrations reflect whole body polyamine levels. The purpose of this study was to investigate changes in blood polyamine concentrations during sublethal surgical damage and sepsis. Eight-week-old CDF1 male
Nano-Graphene Oxide-supported APTES-Spermine, as Gene Delivery System, for Transfection of pEGFP-p53 into Breast Cancer Cell Lines
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Purpose: Genetic diseases can be the result of genetic dysfunctions that happen due to some inhibitory and/or environmental risk factors, which are mostly called mutations. One of the most promising treatments for these diseases is
New insights into the role of dietary spermine on inflammation, immune function and related-signalling molecules in the thymus and spleen of piglets.
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This study aimed to determine the effects of dietary spermine supplementation on the inflammatory response and immune function of the thymus and spleen in piglets. Eighty suckling piglets were randomly assigned to receive adequate nutrients supplemented with spermine (0.4 mmol/kg body weight) or
Ototoxicity in vitro: effects of neomycin, gentamicin, dihydrostreptomycin, amikacin, spectinomycin, neamine, spermine and poly-L-lysine.
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The effects that the aminoglycoside-aminocyclitol antibiotics amikacin, dihydrostreptomycin, gentamicin, neomycin, and spectinomycin, the neomycin fragment neamine, and the polybasic compounds spermine and poly-L-lysine, have on outer hair cells in cochlear cultures prepared from the early
Efficacy and toxicity of N,N',N",N"'-tetra(2,3,4-trihydroxybenzoyl)-spermine for decorporation of 239Pu from mice.
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Male SAS/4 mice were injected i.v. with 6.6 kBq 239Pu-citrate. After 1 or 24 h a single i.p. injection of 15 or 30 mumol kg-1 or repeated (three or four) daily injections of 30 mumol kg-1 of tetra-THB-spermine were given, and at 4 or 7 days Pu retention was measured in liver, kidneys and femur.
Mitochondrial calcium uniporter opener spermine attenuates the cerebral protection of diazoxide through apoptosis in rats.
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BACKGROUND
It is reported that ischemic penumbra is a dynamic process, in which irreversible necrosis in the center of ischemia propagates to the neighboring tissue over time. Recent research has indicated that mitochondrial adenosine triphosphate (ATP)-sensitive potassium channels (mitoKATP) opener
Necrosis and apoptosis induced by oxidized low density lipoproteins occur through two calcium-dependent pathways in lymphoblastoid cells.
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Oxidized low density lipoproteins (LDL) elicit in cultured lymphoblastoid cell lines a delayed and sustained calcium rise followed by a progressive of DNA fragmentation, endogenous proteolysis, and morphological features of necrosis and apoptosis. All these events were blocked by chelating the
Tumor necrosis factor-α (TNF-α) augments AMPA-induced Purkinje neuron toxicity.
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It is well recognized that exposure of neurons to excessive levels of the excitatory neurotransmitter glutamate, termed glutamate excitotoxicity, contributes to the damage and degeneration seen in many acute and chronic neurological diseases. However, it is becoming increasingly evident that
Proximal tubule epithelial cell specific ablation of the spermidine/spermine N1-acetyltransferase gene reduces the severity of renal ischemia/reperfusion injury.
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BACKGROUND
Expression and activity of spermidine/spermine N1-acetyltransferase (SSAT) increases in kidneys subjected to ischemia/reperfusion (I/R) injury, while its ablation reduces the severity of such injuries. These results suggest that increased SSAT levels contribute to organ injury; however,
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