menadione/hypoxia

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Menadione and ethacrynic acid inhibit the hypoxia-inducible factor (HIF) pathway by disrupting HIF-1α interaction with p300.

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Hypoxia is a general characteristic of most solid malignancies and intimately related to neoplastic diseases and cancer progression. Homeostatic response to hypoxia is primarily mediated by hypoxia inducible factor (HIF)-1α that elicits transcriptional activity through recruitment of the CREB

Inhibition of Siah2 ubiquitin ligase by vitamin K3 (menadione) attenuates hypoxia and MAPK signaling and blocks melanoma tumorigenesis.

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The E3 ubiquitin ligase Siah2 has been implicated in the regulation of the hypoxia response, as well as in the control of Ras, JNK/p38/NF-kappaB signaling pathways. Both Ras/mitogen-activated protein kinase (MAPK) and hypoxia pathways are important for melanoma development and progression, pointing

Role of hydrogen peroxide in hypoxia-induced erythropoietin production.

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The addition of exogenous H2O2 inhibited hypoxia-induced erythropoietin (Epo) production in the human hepatoma cell line HepG2. Likewise, elevation of endogenous H2O2 levels by the addition of menadione or the catalase inhibitor, aminotriazole, dose-dependently lowered Epo production. The inhibitory

Effect of hepatotoxic chemicals and hypoxia on hepatic nonparenchymal cells: impairment of phagocytosis by Kupffer cells and disruption of the endothelium in rat livers perfused with colloidal carbon.

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Kupffer cells play an important role in liver function and phagocytosis of foreign particles in the hepatic portal tract. Therefore, the purpose of this study was to investigate the influence of several hepatotoxic chemicals (allyl alcohol, ethylhexanol, and menadione) and hypoxia on phagocytic

Dermcidin expression confers a survival advantage in prostate cancer cells subjected to oxidative stress or hypoxia.

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BACKGROUND Dermcidin (DCD) is a candidate survival gene in breast cancer. DCD gene expression has been identified in prostate cancer cell lines and primary prostate cancer tissue. The DCD protein is composed of proteolysis-inducing factor-core peptide (PIF-CP) and the skin antimicrobial DCD-1. The

Menadione-treated synaptosomes as a model for post-ischaemic neuronal damage.

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Menadione bisulphite increased endogenous oxygen-radical production by rat brain synaptosomes, as indicated by H2O2 generation. Increased oxygen-radical production was also demonstrated in synaptosomes prepared from menadione-treated rats and synaptosomes reoxygenated after an anoxic insult.

Attenuation of lipopolysaccharide-induced oxidative stress and apoptosis in fetal pulmonary artery endothelial cells by hypoxia.

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Pulmonary vascular endothelial injury resulting from lipopolysaccharide (LPS) and oxygen toxicity contributes to vascular simplification seen in the lungs of premature infants with bronchopulmonary dysplasia. Whether the severity of endotoxin-induced endothelial injury is modulated by ambient oxygen

Effects of menadione and its derivative on cultured cardiomyocytes with mitochondrial disorders.

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Mitochondrial disorder is characteristic of many myocardial injuries such as endotoxemia, shock, acidosis, ischemia/reperfusion, and others. The goal of possible therapy is to increase ATP production. Derivatives of vitamins K may be a potent electron carrier between various mitochondrial

Menadione reduces rotenone-induced cell death in cerebellar granule neurons.

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Oxidative stress has been implicated in neuronal death caused by cerebral ischemia or some neurologic disorders. Chemical hypoxia (term defining the simulation by using respiratory inhibitors) chosen as in vitro ischemic model, was induced in primary cultures of rat cerebellar granule neurons by

Possible role of ROS as mediators of hypoxia-induced ion transport inhibition of alveolar epithelial cells.

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In oxygen-sensitive excitable cells, responses to hypoxia are initiated by membrane depolarization due to closing of the K channels that is thought to be mediated by a decrease in reactive oxygen species (ROS). Because the mechanisms of hypoxic inhibition of ion transport of alveolar epithelial

Sulfoxide-containing aromatic nitrogen mustards as hypoxia-directed bioreductive cytotoxins.

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A series of diaryl and alkylaryl sulfoxide-containing nitrogen mustards were synthesized and evaluated for their hypoxia-selective cytotoxicity against V-79 cells in vitro as well as for their metabolism profiles with the rat S-9 fractions. In general, the diaryl sulfoxides (4, 5, and 7-9) showed

Hypoxia and oxygen dependence of cytotoxicity in renal proximal tubular and distal tubular cells.

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Ischemia and hypoxia are major causes of renal failure and altered oxygen supply may affect renal responses to toxic chemicals. In vitro experiments were designed to evaluate the susceptibility of isolated proximal tubular (PT) and distal tubular (DT) cells from rat kidney to brief periods of oxygen

Enhanced expression of glutathione peroxidase protects islet beta cells from hypoxia-reoxygenation.

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The survival of pancreatic islet beta-cell xenografts and allografts may be affected by damaging reactive oxygen and nitrogen species generated during hypoxia-reoxygenation. Peroxynitrite, which is formed from superoxide and nitric oxide, appears to be an important mediator of beta-cell destruction.

Oligodendroglial precursor cell susceptibility to hypoxia is related to poor ability to cope with reactive oxygen species.

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Oligodendrocyte precursors and astrocytes in 2-week-old rat primary glial cultures survived 24 h of anoxia, suggesting both cell types could survive using glycolysis for ATP synthesis; however, when the hypoxia developed gradually, the majority of oligodendrocyte precursor cells died within 24 h of

Reactive oxygen species stabilize hypoxia-inducible factor-1 alpha protein and stimulate transcriptional activity via AMP-activated protein kinase in DU145 human prostate cancer cells.

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Hypoxia-inducible factor (HIF-1) plays a central role in the cellular adaptive response to hypoxic conditions, which are closely related to pathophysiological conditions, such as cancer. Although reactive oxygen species (ROS) have been implicated in the regulation of hypoxic and non-hypoxic

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