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Sony to Pull classique set up R&D centers in Taiwan for gaming products
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Wie kan baat by NAD Terapie?
Wat is NAD?
NAD (nikotinamied adenien denikleotied) is ’n metaboliese ko-ensiem wat voortdurend wissel tussen die NAD- en NADH-verbindings in die liggaam. Ensieme onderhou alle lewensfunksies. Daar is twee basiese ensiemklasse: verteringsensieme en metaboliese ensieme. Metaboliese ensieme is verantwoordelik vir die bou, herstel en herbou van elke sel, en die liggaam is … |
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Preventing NAD(+) depletion protects neurons against excitotoxicity: bioenergetic effects of mild mitochondrial uncoupling and c
Neurons are excitable cells that require large amounts of energy to support their survival and functions and are therefore prone to excitotoxicity, which involves energy depletion.
By examining bioenergetic changes induced by glutamate, we found that the cellular nicotinamide adenine dinucleotide (NAD(+)) level is a critical determinant of neuronal survival. The bioener… |
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Roles of NAD(+) / NADH and NADP(+) / NADPH in cell death.
A rapidly growing body of information has suggested that NAD (including NAD+ and NADH) and NADP (including NADP+ and NADPH) could be new fundamental factors in cell death:
Many studies have indicated key roles of poly (ADP-ribose) polymerases and sirtuins--two families of NAD-dependent enzymes--in cell death; and NAD may also affect cell survival by influencing mitochondrial permeabi… |
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Emerging roles of NAD+ and its metabolites in cell signaling.
Nicotinamide adenine dinucleotide (NAD(+)) is the universal currency of energy metabolism and electron transfer. Recent studies indicate that apart from its role as a coenzyme, NAD(+) and its metabolites also function in cell signaling pathways; for example, they are substrates for nucleotide-metabolizing enzymes and ligands for extra- and intracellular receptors and ion channels. |
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NAD+ availability and proteotoxicity.
It has been shown that NAD(+) availability is important for neuronal survival following ischemia (Liu et al., Neuromolecular Med 11:28-42, 2009).
It is proposed here that NAD(+) may also control proteotoxicity by influencing both formation and catabolism of altered proteins. It is suggested that low NAD(+) availability promotes synthesis of methylglyoxal (MG) which can induce formati… |
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NAD(+)-dependent histone deacetylases (sirtuins) as novel therapeutic targets.
Histone deacetylases (HDACs) are enzymes that cleave off acetyl groups from acetyl-lysine residues in histones and various nonhistone proteins. Four different classes of HDACs have been identified in humans so far. Although classes I, II, and IV are zinc-dependent amidohydrolases, class III HDACs depend on nicotinamide adenine dinucleotide (NAD(+)) for their catalytic activity. According to their …
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SIRT1-dependent regulation of chromatin and transcription: Linking NAD(+) metabolism and signaling to the control of cellular fu
Sirtuins comprise a family of NAD(+)-dependent protein deacetylases and ADP-ribosyltransferases. Mammalian SIRT1 - a homolog of yeast Sir2, the prototypical member of the sirtuin family - is an important regulator of metabolism, cell differentiation and senescence, stress response, and cancer.
As an NAD(+)-dependent enzyme, SIRT1 regulates gene expression programs in response to cell… |
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"Clocks" in the NAD World: NAD as a metabolic oscillator for the regulation of metabolism and aging.
SIR2 (silent information regulator 2) proteins, now called "sirtuins," are an evolutionarily conserved family of NAD-dependent protein deacetylases/ADP-ribosyltransferases. Sirtuins have recently attracted major attention in the field of aging research, and it has been demonstrated that SIR2 and its orthologs regulate aging and longevity in yeast, worms, and flies.
In mamma… |
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Exogenous NAD blocks cardiac hypertrophic response via activation of the SIRT3-LKB1-AMP-activated kinase pathway.
Since the discovery of NAD-dependent deacetylases, sirtuins, it has been recognized that maintaining intracellular levels of NAD is crucial for the management of stress response of cells.
Here we show that agonist-induced cardiac hypertrophy is associated with loss of intracellular levels of NAD, but not exercise-induced physiologic hypertrophy. Exogenous addition of NAD was capable … |
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The secret life of NAD+: an old metabolite controlling new metabolic signaling pathways.
A century after the identification of a coenzymatic activity for NAD(+), NAD(+) metabolism has come into the spotlight again due to the potential therapeutic relevance of a set of enzymes whose activity is tightly regulated by the balance between the oxidized and reduced forms of this metabolite.
In fact, the actions of NAD(+) have been extended from being an oxidoreductase cofactor … |
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Ten years of NAD-dependent SIR2 family deacetylases: implications for metabolic diseases.
Since the discovery of NAD-dependent deacetylase activity of the silent information regulator-2 (SIR2) family ('sirtuins'), many exciting connections between protein deacetylation and energy metabolism have been revealed.
The importance of sirtuins in the regulation of many fundamental biological responses to various nutritional and environmental stimuli has been firmly established. … |
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NAD+: a modulator of immune functions.
Latterly, nicotinamide adenine dinucleotide (NAD(+)) has emerged as a molecule with versatile functions and of enormous impact on the maintenance of cell integrity.
Besides playing key roles in almost all major aspects of energy metabolism, there is mounting evidence that NAD(+) and its degradation products affect various biological activities including calcium homeostasis, gene tran… |
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Turnover at nicotinamide adenine dinucleotide in cultures of human cells.
The rate of turnover of nicotinamide adenine dinucleotide (NAD) in the human cell line, D98/AH2, has been estimated by measuring the rates of entry into and exit from NAD molecules of 14C-adenine. In one set of experiments, cells were labeled by growth in medium containing 14C-adenine for six hours and then shifted to medium without labeled adenine.
The loss of 14C-adenine from the a… |
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Nicotinamide adenine dinucleotide, a metabolic regulator of transcription, longevity and disease.
Nicotinamide adenine dinucleotide (NAD) is a ubiquitous biological molecule that participates in many metabolic reactions.
Recent studies show that NAD also plays important roles in transcriptional regulation, longevity, calorie-restriction-mediated life-span extension and age-associated diseases. It has been shown that NAD affects longevity and transcriptional silencing through the … |
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Nicotinamide adenine dinucleotide metabolism as an attractive target for drug discovery.
Nicotinamide adenine dinucleotide (NAD(+)) has crucial roles in many cellular processes, both as a coenzyme for redox reactions and as a substrate to donate ADP-ribose units. Enzymes involved in NAD(+) metabolism are attractive targets for drug discovery against a variety of human diseases, including cancer, multiple sclerosis, neurodegeneration and Huntington's disease. |
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Nicotinamide adenine dinucleotide based therapeutics.
Nicotinamide adenine dinucleotide (NAD), generally considered a key component involved in redox reactions, has been found to participate in an increasingly diverse range of cellular processes, including signal transduction, DNA repair, and post-translational protein modifications.
In recent years, medicinal chemists have become interested in the therapeutic potential of molecules aff… |
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Pharmacokinetics of the dietary supplement creatine.
Creatine is a nonessential dietary component that, when supplemented in the diet, has shown physiological benefits in athletes, in animal-based models of disease and in patients with various muscle, neurological and neuromuscular disease.
The clinical relevance of creatine supplementation is based primarily on its role in ATP generation, and cells may be able to better handle rapidly… |
