pyrogallol/hypoxia

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Pyrogallol-Phloroglucinol-6,6-Bieckol from Ecklonia cava Attenuates Tubular Epithelial Cell (TCMK-1) Death in Hypoxia/Reoxygenation Injury.

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The hypoxia/reoxygenation (H/R) injury causes serious complications after the blood supply to the kidney is stopped during surgery. The main mechanism of I/R injury is the release of high-mobility group protein B1 (HMGB1) from injured tubular epithelial cells (TEC, TCMK-1 cell), which triggers TLR4

A water extract of Curcuma longa L. (Zingiberaceae) rescues PC12 cell death caused by pyrogallol or hypoxia/reoxygenation and attenuates hydrogen peroxide induced injury in PC12 cells.

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A number of studies indicate that free radicals are involved in the neurodegeneration in Alzheimer's disease (AD). The role of superoxide anion (O2*-) in neuronal cell injury induced by reactive oxygen species (ROS) was examined in PC12 cells using pyrogallol (1,2,3-benzenetrior), a donor to release

Cell permeable ROS scavengers, Tiron and Tempol, rescue PC12 cell death caused by pyrogallol or hypoxia/reoxygenation.

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The role of superoxide anion (O(2)*-) in neuronal cell injury induced by reactive oxygen species (ROS) was examined in PC12 cells using pyrogallol (1,2,3-benzenetrior), a donor to release O(2)*-. Pyrogallol induced PC12 cell death at concentrations, which evidently increased intracellular O(2)*-, as

Role of nitric oxide and its interaction with superoxide in the suppression of cardiac muscle mitochondrial respiration. Involvement in response to hypoxia/reoxygenation.

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BACKGROUND Nitric oxide (NO); superoxide anion (O2.d-); the reaction product of NO with O2.d-, peroxynitrite (ONOO-); and ischemia/reperfusion have all been reported to inhibit respiration in isolated mitochondria. However, the specific species involved in the inhibition of respiration in intact

Loss of endothelium-dependent relaxant activity in the pulmonary circulation of rats exposed to chronic hypoxia.

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To determine whether exposure to chronic hypoxia and subsequent development of pulmonary hypertension induces alterations of endothelium-dependent relaxation in rat pulmonary vascular bed, we studied isolated lung preparations from rats exposed to either room air (controls) or hypoxia (H) during 1

Inhibition of rat cardiac muscle contraction and mitochondrial respiration by endogenous peroxynitrite formation during posthypoxic reoxygenation.

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This study was designed to investigate the potential role of endogenous peroxynitrite (ONOO-) formation in the inhibition of cardiac muscle contractility and mitochondrial respiration during posthypoxic reoxygenation. Isometric contraction of isolated rat left ventricular posterior papillary muscle

Nitric oxide donors suppress erythropoietin production in vitro.

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Many inflammatory diseases are associated with a hypoproliferative anaemia. Patients with this anaemia often present with serum erythropoietin (EPO) concentrations that are too low for the degree of their anaemia. Proinflammatory cytokines, in addition to their inhibitory effects on proliferation of

Cobalt chloride and desferrioxamine antagonize the inhibition of erythropoietin production by reactive oxygen species.

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We have recently proposed a H2O2-generating b-type cytochrome as part of the cellular oxygen sensor that controls O2-dependent erythropoietin (Epo) production in the human hepatocellular carcinoma cell line HepG2. H2O2 could act as an intracellular signaling molecule because its production in HepG2

Rubia cordifolia, Fagonia cretica linn and Tinospora cordifolia exert neuroprotection by modulating the antioxidant system in rat hippocampal slices subjected to oxygen glucose deprivation.

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BACKGROUND The major damaging factor during and after the ischemic/hypoxic insult is the generation of free radicals, which leads to apoptosis, necrosis and ultimately cell death. Rubia cordifolia (RC), Fagonia cretica linn (FC) and Tinospora cordifolia (TC) have been reported to contain a wide

Fabrication of composite microfluidic devices for local control of oxygen tension in cell cultures.

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Oxygen tension is a central component of the cellular microenvironment and can serve as a trigger for changes in cell phenotype and function. There is a strong need to precisely control and modulate oxygen tension in cell culture systems in order to more accurately model the physiology and

Fe(III) improves antioxidant and cytoprotecting activities of mangiferin.

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Iron-induced oxidative stress has been implicated in several pathological processes. In the present work we provide evidence for the formation of a mangiferin:Fe(III) complex (2:1), shown by means of either iron-induced changes in the UV/visible spectrum of mangiferin or by reduction of the anodic

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