nicotinamide/некроза

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Nicotinamide "protects" resting lymphocytes exposed to hydrogen peroxide from necrosis but not from apoptosis.

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The aim of this work was to investigate the relationship between mechanisms of DNA repair and apoptosis induced by oxidative stress (H2O2) in human lymphocytes. Using the comet assay, fluorescent microscopy, and DNA electrophoresis, we studied the DNA damage induced by hydrogen peroxide (H2O2)

Tumour oxygenation, radiosensitivity, and necrosis before and/or after nicotinamide, carbogen and perflubron emulsion administration.

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Hypoxia is one of the factors involved in tumour resistance to radiotherapy. One way to improve tumour oxygenation is to use oxygen carriers such as perflubron emulsion plus carbogen or vasoactive drugs such as nicotinamide. The perflubron emulsion and carbogen act mainly on hypoxia caused by

Protective effect of nicotinamide and 3-aminobenzamide on islet cell damage induced by gamma-interferon and tumor necrosis factor.

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Mouse islet cell monolayers were damaged when cultured for five days in a medium containing 200 U/ml of recombinant murine interferon-gamma (IFN-gamma) and 300 U/ml of recombinant tumor necrosis factor (TNF). The cells formed granular clusters and ultimately floated in the medium; the floating cells

Nicotinamide inhibits enhanced in vitro production of interleukin-12 and tumour necrosis factor-alpha in peripheral whole blood of people at high risk of developing type 1 diabetes and people with newly diagnosed type 1 diabetes.

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Macrophages and T lymphocytes are the first cells to appear in pancreatic islets in the development of autoimmune diabetes. It has been suggested that cytokines released by monocytes/macrophages, including interleukin-1beta (IL-1beta), interleukin-12 (IL-12) and tumour necrosis factor-alpha

Nicotinamide late protective effects against carbon tetrachloride-induced liver necrosis.

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Nicotinamide (NIC) is known to increase the synthesis of pyridine nucleotides and also to inhibit the hydrolysis of them to ADP-ribose, which in turn is involved in Ca2+ release from mitochondria via the ADP ribosylation of crucial mitochondrial proteins. In this work, we test the potential ability

Axonal and cell body protection by nicotinamide adenine dinucleotide in tumor necrosis factor-induced optic neuropathy.

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Axonal degeneration often leads to the death of neuronal cell bodies. Previous studies have demonstrated the crucial role of nicotinamide adenine dinucleotide (NAD) biosynthesis in axonal protection of motor neurons, but the role of nicotinamide mononucleotide adenylyltransferase 1 and NAD in optic

Biochemical pathways of apoptosis: nicotinamide adenine dinucleotide-deficient cells are resistant to tumor necrosis factor or ultraviolet light activation of the 24-kD apoptotic protease and DNA fragmentation.

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The function of nicotinamide adenine dinucleotide (NAD) and adenosine diphosphate (ADP) ribosylation reactions in the mechanism of apoptotic cell death is controversial, although one theory postulates an essential role for NAD depletion by poly-ADP-ribose polymerase. The present study examined the

Inhibitory effect of nicotinamide on in vitro and in vivo production of tumor necrosis factor-alpha.

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Nicotinamide, a pellagra-preventive factor, has multiple functions such as inhibition of poly-ADP-ribose synthetase, inhibition of inducible nitric oxide synthase, free radical scavenging and suppression of major histocompatibility complex class II expression and ICAM-1 expression on endothelial

Nicotinamide protects human beta cells against chemically-induced necrosis, but not against cytokine-induced apoptosis.

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Nicotinamide intervention trials are presently undertaken to prevent Type I (insulin-dependent) diabetes in high risk subjects. They are based on studies in rodents reporting nicotinamide protection against beta-cell injury in vitro and in vivo. This study examines whether nicotinamide can protect

Protective effects of Guanxin Shutong capsule drug-containing serum on tumor necrosis factor-α-induced endothelial dysfunction through nicotinamide adenine dinucleotide phosphate oxidase and the nitric oxide pathway.

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The Chinese medicinal formula Guanxin Shutong capsule (GXSTC) has been used for almost 10 years as a clinical treatment for chest pain, depression, palpitation and cardiovascular diseases. The aim of this study was to investigate the effects of GXSTC drug-containing serum on tumor necrosis factor-α

Endogenous tumor necrosis factor-alpha production by a pancreatic beta-cell line: inhibitory effects of hydrocortisone and nicotinamide.

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The purpose of this study was to examine regulation of interleukin-1(IL-1)-induced tumor necrosis factor-alpha (TNF-alpha) production by a mouse beta-cell line (beta TC1). Three-hour incubation of beta TC1 cells with 5 U/ml of IL-1 beta results in the expression of TNF-alpha mRNA and intracellular

Nicotinamide downregulates gene expression of interleukin-6, interleukin-10, monocyte chemoattractant protein-1, and tumour necrosis factor-α gene expression in HaCaT keratinocytes after ultraviolet B irradiation.

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Ultraviolet (UV) radiation has profound effects on human skin, causing sunburn, inflammation, cellular-tissue injury, cell death, and skin cancer. Most of these effects are mediated by a number of cytokines produced by keratinocytes. In this study we investigated whether nicotinamide (NCT), the

Ameliorative effects of histidine on oxidative stress, tumor necrosis factor alpha (TNF-α), and renal histological alterations in streptozotocin/nicotinamide-induced type 2 diabetic rats

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Objectives: The present study sought to evaluate the beneficial effects of histidine (His) on oxidative stress, tumor necrosis factor alpha (TNF-α), renal histological alterations and anti-oxidant enzymes gene expressions in type 2

Differentiation of apoptosis from necrosis by dynamic changes of reduced nicotinamide adenine dinucleotide fluorescence lifetime in live cells.

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Direct monitoring of cell death (i.e., apoptosis and necrosis) during or shortly after treatment is desirable in all cancer therapies to determine the outcome. Further differentiation of apoptosis from necrosis is crucial to optimize apoptosis-favored treatment protocols. We investigated the

Nicotinamide therapy protects against both necrosis and apoptosis in a stroke model.

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OBJECTIVE Nicotinamide protects against brain damage in ischemia-reperfusion. However, the dosage and time of treatment require clarification. It is also not clear if nicotinamide can protect against both necrosis and apoptosis. METHODS Dose-response and time-effect studies were designed. Transient

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