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Página 1 desde 1075 resultados
Differential effects of α-tocopherol and N-acetyl-cysteine on advanced glycation end product-induced oxidative damage and neurite degeneration in SH-SY5Y cells.
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Advanced glycation end products (AGEs) result from non-enzymatic glycation of proteins and cause cellular oxidative stress in a nicotinamide adenine dinucleotide phosphate (NADPH) oxidase-dependent manner. Due to these effects, AGEs are implicated as a causal factor in diabetic complications.
Variation with ageing and degeneration of the serine and cysteine proteinase inhibitors of human articular cartilage.
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The proteoglycans, and proteinase inhibitors of normal and degenerate human articular cartilage have been isolated by 4.0M GuHCl extraction, CsCl density gradient ultracentrifugation and Sephadex G-75 gel filtration chromatography. While a small amount of trypsin inhibitory activity eluted in the
Degenerate cysteine patterns mediate two redox sensing mechanisms in the papillomavirus E7 oncoprotein.
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Infection with oncogenic human papillomavirus induces deregulation of cellular redox homeostasis. Virus replication and papillomavirus-induced cell transformation require persistent expression of viral oncoproteins E7 and E6 that must retain their functionality in a persistent oxidative environment.
Reduction of lower motor neuron degeneration in wobbler mice by N-acetyl-L-cysteine.
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The murine mutant wobbler is a model of lower motoneuron degeneration with associated skeletal muscle atrophy. This mutation most closely resembles Werdnig-Hofmann disease in humans and shares some of the clinical features of amyotrophic lateral sclerosis (ALS). It has been suggested that reactive
Investigation of the therapeutic potential of N-acetyl cysteine and the tools used to define nigrostriatal degeneration in vivo.
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The glutathione precursor N-acetyl-L-cysteine (NAC) is currently being tested on Parkinson's patients for its neuroprotective properties. Our studies have shown that NAC can elicit protection in glutathione-independent manners in vitro. Thus, the goal of the present study was to establish an animal
Five cysteine-containing compounds delay diabetic deterioration in Balb/cA mice.
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The effects of n-acetyl cysteine (NAC), s-allyl cysteine (SAC), s-ethyl cysteine, s-methyl cysteine and s-propyl cysteine (SPC) activity on Balb/cA mice against diabetic complications were examined. These complications included hyperglycemia, hyperlipidemia, oxidation stress, blood coagulation, and
Antioxidant supplements prevent oxidation of cysteine/cystine redox in patients with age-related macular degeneration.
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OBJECTIVE
Determine whether antioxidant supplements alter the plasma glutathione and/or cysteine redox potential in age-related macular degeneration (AMD) patients.
METHODS
This was an ancillary study to the Age-Related Eye Disease Study (AREDS), where subset of AREDS subjects at two sites were
Comparative analysis of thymic subpopulations during different modes of atrophy identifies the reactive oxygen species scavenger, N-acetyl cysteine, to increase the survival of thymocytes during infection-induced and lipopolysaccharide-induced thymic atrophy.
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The development of immunocompetent T cells entails a complex pathway of differentiation in the thymus. Thymic atrophy occurs with ageing and during conditions such as malnutrition, infections and cancer chemotherapy. The comparative changes in thymic subsets under different modes of thymic atrophy
Drosophila retinal degeneration A gene encodes an eye-specific diacylglycerol kinase with cysteine-rich zinc-finger motifs and ankyrin repeats.
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The Drosophila visual mutant, carrying the retinal degeneration A gene (rdgA), has photoreceptor cells that degenerate within a week after eclosion. Morphological studies suggested that this mutant harbors abnormalities in membrane turnover of the photoreceptor cells. Biochemically, the rdgA mutant
S-allyl cysteine: A potential compound against skeletal muscle atrophy
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Background: Oxidative stress is crucial player in skeletal muscle atrophy pathogenesis. S-allyl cysteine (SAC), an organosulfur compound of Allium sativum, possesses broad-spectrum properties including immuno- and redox-modulatory impact.
N-Acetyl-L-cysteine Protects Human Retinal Pigment Epithelial Cells from Oxidative Damage: Implications for Age-Related Macular Degeneration.
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Age-related macular degeneration (AMD) involves the loss of retinal pigment epithelium (RPE) and photoreceptors and is one of the leading causes of blindness in the elderly. Oxidative damage to proteins, lipids, and DNA has been associated with RPE dysfunction and AMD. In this study, we evaluated
Cysteine string protein-alpha prevents activity-dependent degeneration in GABAergic synapses.
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The continuous release of neurotransmitter could be seen to place a persistent burden on presynaptic proteins, one that could compromise nerve terminal function. This supposition and the molecular mechanisms that might protect highly active synapses merit investigation. In hippocampal cultures from
Retinal degeneration in cats fed casein. II. Supplementation with methionine, cysteine, or taurine.
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All cats fed a taurine-free casein diet for 23 weeks have shown a nondetectable electroretinogram (ERG) in association with a plasma and retinal taurine deficiency. In the present study, the casein diet was supplemented with either taurine or taurine precursors (methionine or cysteine) for 23 weeks
Cysteine function governs its conservation and degeneration and restricts its utilization on protein surfaces.
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Cysteine (Cys) is an enigmatic amino acid residue. Although one of the least abundant, it often occurs in the functional sites of proteins. Whereas free Cys is a polar amino acid, Cys in proteins is often buried, and its classification on the hydrophobicity scale is ambiguous. We hypothesized that
Protective effect of cysteine against retinal degeneration induced by iodate and by iodoacetate.
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