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spermidine/akuutti patologinen solukuolema
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Sivu 1 alkaen 74 tuloksia
Exogenous spermidine ameliorates tubular necrosis during cisplatin nephrotoxicity.
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The hallmark of cisplatin-induced acute kidney injury is the necrotic cell death in the kidney proximal tubules. However, an effective approach to limit cisplatin nephrotoxicity remains unknown. Spermidine is a polyamine that protects against oxidative stress and necrosis in aged yeasts, and the
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,
Spermidine rescues proximal tubular cells from oxidative stress and necrosis after ischemic acute kidney injury.
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Kidney ischemia and reperfusion injury (IRI) is associated with a high mortality rate, which is attributed to tubular oxidative stress and necrosis; however, an effective approach to limit IRI remains elusive. Spermidine, a naturally occurring polyamine, protects yeast cells against aging through
Target cell toxicity of inhaled spermidine in rat lungs.
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Rats were exposed for a single 6-h period to varying concentrations of aerosols of the polyamine, spermidine trihydrochloride. They were subsequently killed at 6 h, 1, 2, 5, 9 and 14 days after the start of exposure. The lungs were examined for histopathological alterations at both light and
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
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
Potential effect of spermidine on GABA, dopamine, acetylcholinesterase, oxidative stress and proinflammatory cytokines to diminish ketamine-induced psychotic symptoms in rats.
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Ketamine, N-methyl-d-aspartate receptor antagonist has been implanted in such behavioural and biochemical alterations in animals similar to human psychosis. Spermidine, a biogenic polyamine, involved in various cellular functions in living organisms, on the contrary possess NMDA receptor agonistic
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
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,
Polyamine depletion inhibits apoptosis following blocking of survival pathways in human chondrocytes stimulated by tumor necrosis factor-alpha.
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Chondrocyte apoptosis can be an important contributor to cartilage degeneration, thereby making it a potential therapeutic target in articular diseases. To search for new approaches to limit chondrocytic cell death, we investigated the requirement of polyamines for apoptosis favored by tumor
Apoptotic response to 5-fluorouracil treatment is mediated by reduced polyamines, non-autocrine Fas ligand and induced tumor necrosis factor receptor 2.
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5-fluorouracil (5-FU) is the major chemotherapeutic agent for treatment of colorectal carcinoma, but the molecular mechanisms of response and resistance are not understood completely. We therefore studied the 5-FU dose response and time course of gene expression transcriptome changes in colon
Polyamine depletion switches the form of 2-deoxy-D-ribose-induced cell death from apoptosis to necrosis in HL-60 cells.
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Our previous studies demonstrated that intracellular polyamine depletion blocked HL-60 cell apoptosis triggered by exposure to 2-deoxy-d-ribose (dRib). Here, we have characterized the intracellular events underlying the apoptotic effects of dRib and the involvement of polyamines in these effects.
The propeptide of yeast cathepsin D inhibits programmed necrosis.
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The lysosomal endoprotease cathepsin D (CatD) is an essential player in general protein turnover and specific peptide processing. CatD-deficiency is associated with neurodegenerative diseases, whereas elevated CatD levels correlate with tumor malignancy and cancer cell survival. Here, we show that
Inhibitors of polyamine biosynthesis block tumor necrosis factor-induced activation of macrophages.
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The activation of polyamine biosynthesis, dependent on increased gene expression of ornithine decarboxylase, has been found to play an important role in the control of cell proliferation and differentiation. In this report it has been found that accumulation of ornithine decarboxylase mRNA also
Probing the molecular mechanism of hypericin-induced parasite death provides insight into the role of spermidine beyond redox metabolism in Leishmania donovani.
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Hypericin, a natural compound from Hypericum perforatum (St. John's wort), has been identified as a specific inhibitor of Leishmania donovani spermidine synthase (LdSS) using integrated computational and biochemical approaches. Hypericin showed in vitro inhibition of recombinant LdSS enzyme
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