telangiectasis/glutation

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Analysis of glutathione S-transferase Pi isoform (GSTP1) single-nucleotide polymorphisms and macular telangiectasia type 2.

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Recent imaging studies have suggested that macular pigment is decreased centrally in macular telangiectasia type 2 (MT2). The uptake of xanthophyll pigment into the macula is thought to be facilitated by a xanthophyll-binding protein (XBP). The Pi isoform of glutathione S-transferase (GSTP1)

Mutation of ataxia-telangiectasia mutated is associated with dysfunctional glutathione homeostasis in cerebellar astroglia.

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Astroglial dysfunction plays an important role in neurodegenerative diseases otherwise attributed to neuronal loss of function. Here we focus on the role of astroglia in ataxia-telangiectasia (A-T), a disease caused by mutations in the ataxia-telangiectasia mutated (ATM) gene. A hallmark of A-T

Glutathione levels in blood from ataxia telangiectasia patients suggest in vivo adaptive mechanisms to oxidative stress.

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OBJECTIVE To evaluate an in vivo pro-oxidant state in patients with ataxia telangiectasia (AT). METHODS A set of oxidative stress endpoints were measured in 9 AT homozygotes, 16 AT heterozygotes (parents) and 83 controls (grouped in age ranges as for patients and parents, respectively). The

Some aspects of glutathione metabolism in ataxia-telangiectasia fibroblasts.

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Levels of glutathione (GSH) and two enzymes involved in GSH metabolism, glutathione reductase (GR) and glutathione-S-transferase(s) (GST), were measured in four SV40-transformed human fibroblast cell lines. MRC5-V1 and GM0637, derived from normal individuals, had mean GSH levels of 4.2 and 6.5

An ataxia telangiectasia model: inefficient cell differentiation and possible reversal by serine protease inhibitors, tumor necrosis factor inhibitors, dexamethasone, and glutathione enhancers.

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Ataxia telangiectasia (AT) is a rare genetic disorder. Symptoms of the disease include cerebellar ataxia, depressed immunoresponsiveness, increased sensitivity to radiation, and leukemias. Various kinds of AT cells show reduced efficiency of differentiation. The ataxia telangiectasia gene (ATM) may

Imparied glutathione biosynthesis in cultured human ataxia-telangiectasia cells.

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Cell lines established from donors with the inherited disorder ataxia-telangiectasia (A-T) exhibit exceptional sensitivity to ionizing radiation and chemicals known to produce increased levels of intracellular H2O2, suggesting a deficiency in glutathione-dependent detoxication reactions. Glutathione

Re: Impaired glutathione biosynthesis in cultured ataxia-telangiectasia cells.

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Does Ataxia Telangiectasia Mutated (ATM) protect testicular and germ cell DNA integrity by regulating the redox status?

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A balanced redox homeostasis in the testis is essential for genetic integrity of sperm. Reactive oxygen species can disturb this balance by oxidation of glutathione, which is regenerated using NADPH, formed by glucose-6-phosphate dehydrogenase (G6PDH). G6PDH is regulated by the Ataxia Telangiectasia

Glutamine deprivation induces interleukin-8 expression in ataxia telangiectasia fibroblasts.

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OBJECTIVE To investigate whether glutamine deprivation induces expression of inflammatory cytokine interleukin-8 (IL-8) by determining NF-κB activity and levels of oxidative indices (ROS, reactive oxygen species; hydrogen peroxide; GSH, glutathione) in fibroblasts isolated from patients with ataxia

Antioxidant Defense, Redox Homeostasis, and Oxidative Damage in Children With Ataxia Telangiectasia and Nijmegen Breakage Syndrome.

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Ataxia-telangiectasia (AT) and Nijmegen breakage syndrome (NBS) belong to a group of primary immunodeficiency diseases (PI) characterized by premature aging, cerebral degeneration, immunoglobulin deficiency and higher cancer susceptibility. Despite the fact that oxidative stress has been

Dexamethasone improves redox state in ataxia telangiectasia cells by promoting an NRF2-mediated antioxidant response.

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Ataxia telangiectasia (A-T) is a rare incurable neurodegenerative disease caused by biallelic mutations in the gene for ataxia-telangiectasia mutated (ATM). The lack of a functional ATM kinase leads to a pleiotropic phenotype, and oxidative stress is considered to have a crucial role in the complex

Blood metal levels and related antioxidant enzyme activities in patients with ataxia telangiectasia.

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Transition metals are cofactors for a wide range of vital enzymes and are directly or indirectly involved in the response against reactive oxygen species (ROS), which can damage cellular components. Their altered homeostasis has been studied in neurodegenerative disorders such as Alzheimer's disease

Germline glutathione S-transferase variants in breast cancer: relation to diagnosis and cutaneous long-term adverse effects after two fractionation patterns of radiotherapy.

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OBJECTIVE To explore whether certain glutathione S-transferase (GST) polymorphisms are associated with an increased risk of breast cancer or the level of radiation-induced adverse effects after two fractionation patterns of adjuvant radiotherapy. METHODS The prevalence of germline polymorphic

Nuclear factor erythroid 2-related factor 2-antioxidant activation through the action of ataxia telangiectasia-mutated serine/threonine kinase is essential to counteract oxidative stress in bovine mammary epithelial cells.

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Nuclear factor (erythroid-derived 2)-like factor 2 (NFE2L2, formerly Nrf2) is a transcription factor that binds to the antioxidant response element (ARE) in the upstream promoter region of various antioxidant-responsive genes. Hence, at least in nonruminants, the NFE2L2-ARE signaling pathway plays

Ataxia telangiectasia mutated proteins, MAPKs, and RSK2 are involved in the phosphorylation of STAT3.

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Phosphorylation at Ser(727) is known to be required for complete activation of STAT3 by diverse stimuli including UV irradiation, but the kinase(s) responsible for phosphorylating STAT3 (Ser(727)) is still not well discerned. In the present study, we observed that activation of ATM is required for a

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