diaphorase/necrosis

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Triphosphopyridine nucleotide (TPN) diaphorase and TPN-dependent dehydrogenase activity of reactive macrophages in tissue necrosis.

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Effect of inducers of DT-diaphorase on the haemolytic activity and nephrotoxicity of 2-amino-1,4-naphthoquinone in rats.

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Reduction of naphthoquinones by DT-diaphorase is often described as a detoxification reaction. This is true for some naphthoquinone derivatives, such as alkyl and di-alkyl naphthoquinones, but the situation with other substances, such as 2-hydroxy-1,4-naphthoquinone, is more complex. In the present

dT diaphorase: increased enzyme activity and mRNA expression in oxidant stress of skin.

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DT diaphorase is a flavoprotein that enzymatically transfers two electrons from quinones as intermediate substrates and has been reported to increase its activity in the liver after exposure to toxicants. In this series of experiments, we tested the hypothesis that DT diaphorase also increases its

Effects of modulation of tissue activities of DT-diaphorase on the toxicity of 2,3-dimethyl-1,4-naphthoquinone to rats.

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The enzyme DT-diaphorase mediates the two-electron reduction of quinones to hydroquinones. It has previously been shown that the toxicity of 2-methyl-1,4-naphthoquinone to rats is decreased by pre-treatment of the animals with compounds that increase tissue levels of this enzyme. In contrast, the

NADPH-diaphorase activity in activated astrocytes represents inducible nitric oxide synthase.

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In paraformaldehyde-fixed sections of healthy brain, glial cells at the light-microscope level do not contain measurable levels of NADPH-diaphorase. However, after a variety of lesions in the mouse brain, some reactive astrocytes express varying amounts of this enzyme. Following stab wounds,

Impact of blood flow occlusion on liver necrosis following thermal ablation.

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BACKGROUND Laser, radiofrequency and microwave are common techniques for local destruction of liver tumours by thermal ablation. The main limitation of thermal ablation treatment is the volume of necrosis that can be achieved. Blood flow occlusion is commonly advocated as an adjunct to thermal

Enzyme histochemical analysis of cell viability after argon laser-induced coagulation necrosis of the skin.

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Reduction of nitroblue tetrazolium chloride, a redox indicator, by nicotinamide adenine dinucleotide diaphorase produces in frozen tissue sections an intense blue cytoplasmic pigment. The activity of this enzyme has been shown to subside immediately upon cell death. Twelve patients with port-wine

Entamoeba histolytica: production of nitric oxide and in situ activity of NADPH diaphorase in amebic liver abscess of hamsters.

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Entamoeba histolytica trophozoites were inoculated into the liver of hamsters and serum nitrate/nitrite levels [expressed as nitric oxide (NO) production] were determined at different times during amebic liver abscess (ALA) development. We also tested the effects of NO synthase (NOS) inhibitors such

Localization and changes in NADPH-diaphorase reactivity and nitric oxide synthase immunoreactivity in rat pulp following tooth preparation.

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Inflammatory changes in the dental pulp are accompanied by release of a wide variety of chemical mediators. Nitric oxide, an oxidative free radical produced by the enzyme nitric oxide synthase (NOS), has been implicated in multiple inflammatory processes, which makes it a suitable marker for changes

Increased NADPH-diaphorase reactivity and cytokine expression in dorsal root ganglia in acquired immunodeficiency syndrome.

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We studied lumbosacral dorsal root ganglia (DRGs) from 10 patients with acquired immunodeficiency syndrome (AIDS) and five controls using immunocytochemistry, in situ hybridization and NADPH-diaphorase (NADPHd) histochemistry. Human immunodeficiency virus (HIV)-1 RNA was detected in five AIDS cases,

Focal hyperthermia produces progressive tumor necrosis independent of the initial thermal effects.

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Focal hyperthermia, produced using laser, radio frequency, and microwave, is used to treat liver tumors. The exact mechanisms of tissue destruction using focal hyperthermia are, however, unknown. Clinical and experimental studies suggest a progression of injury after cessation of the initial heat

On the neurotoxicity mechanism of leukoaminochrome o-semiquinone radical derived from dopamine oxidation: mitochondria damage, necrosis, and hydroxyl radical formation.

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Leukoaminochrome o-semiquinone radical is generated during one-electron reduction of dopamine oxidation product aminochrome when DT-diaphorase is inhibited. Incubation of 100 microM aminochrome with 100 microM dicoumarol, an inhibitor of DT-diaphorase during 2 h, induces 56% cell death (P < 0.001)

Involvement of nitric oxide synthase in the physiology and pathophysiology of facial nerve function and dysfunction.

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To date few reports have discussed the presence and function of nitric oxide (NO) in structures of the facial nerve. We performed nicotinamide adenine dinucleotide phosphate (NADPH-d)-diaphorase-histochemistry and immunohistochemistry on the intratemporal portion of the facial nerve, including the

Histochemical evaluation of the coagulation depth after argon laser impact on a port-wine stain.

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A two-step excisional treatment of a port-wine stain (PWS) on the back of a 43-yr-old female patient was performed. Immediately before the first surgical treatment, two corresponding series of argon laser impacts were performed, each on one PWS half. Different laser parameters with irradiances

Infrared thermography and thermocouple mapping of radiofrequency renal ablation to assess treatment adequacy and ablation margins.

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OBJECTIVE The primary disadvantage of renal tumor RF ablation is the inability to monitor the intraoperative propagation of the RF lesion with real-time imaging. We sought to assess whether adequately lethal temperatures are obtained at the margins of the intended ablation zone using laparoscopic

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