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selenoprotein/hypoxie
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Selenoprotein M gene expression, peroxidases activity and hydrogen peroxide concentration are differentially regulated in gill and hepatopancreas of the white shrimp Litopenaeus vannamei during hypoxia and reoxygenation.
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In many organisms, episodes of low O2 concentration (hypoxia) and the subsequent rise of O2 concentration (reoxygenation) result in the accumulation of reactive oxygen species and oxidative stress. Selenoprotein M (SelM), is a selenocysteine containing protein with redox activity involved in the
Electrophilic prostaglandins and lipid aldehydes repress redox-sensitive transcription factors p53 and hypoxia-inducible factor by impairing the selenoprotein thioredoxin reductase.
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Tumor suppressor p53 exhibits an enigmatic phenotype in cells exposed to electrophilic, cyclopentenone prostaglandins of the A and J series. Namely, cells harboring a wild-type p53 gene accumulate p53 protein that is conformationally and functionally impaired. This occurs via an unknown molecular
Hypoxia reduces and redirects selenoprotein biosynthesis.
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Selenium deficiency constitutes a risk factor for the incidence and negative course of severe diseases including sepsis, stroke, autoimmune diseases or cancer. In this study, hypoxia is identified as a powerful stimulus to redirect selenoprotein biosynthesis causing reduced selenoprotein P
Up-regulation of selenoprotein P and HIP/PAP mRNAs in hepatocytes by intermittent hypoxia via down-regulation of miR-203.
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Sleep apnea syndrome is characterized by recurrent episodes of oxygen desaturation and reoxygenation (intermittent hypoxia [IH]) and is a risk factor for insulin resistance/type 2 diabetes. However, the mechanisms linking IH stress and insulin resistance remain elusive. We exposed human hepatocytes
An alternative splicing variant of the selenoprotein thioredoxin reductase is a modulator of estrogen signaling.
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The selenoprotein thioredoxin reductase (TrxR1) is an integral part of the thioredoxin system. It serves to transfer electrons from NADPH to thioredoxin leading to its reduction. Interestingly, recent work has indicated that thioredoxin reductase can regulate the activity of transcription factors
Selenoprotein T as a new positive inotrope in the goldfish, Carassius auratus.
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Selenoprotein T (SELENOT) is a thioredoxin-like protein, which mediates oxidoreductase functions via its redox active motif Cys-X-X-Sec. In mammals, SELENOT is expressed during ontogenesis and progressively decreases in adult tissues. In the heart, it is re-expressed after ischemia and induces
Effects of Intermittent Hypoxia on Pulmonary Vascular and Systemic Diseases.
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Obstructive sleep apnea (OSA) causes many systemic disorders via mechanisms related to sympathetic nerve activation, systemic inflammation, and oxidative stress. OSA typically shows repeated sleep apnea followed by hyperventilation, which results in intermittent hypoxia (IH). IH is associated with
Selenoprotein P Promotes the Development of Pulmonary Arterial Hypertension.
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BACKGROUND
Excessive proliferation and apoptosis resistance of pulmonary artery smooth muscle cells (PASMCs) are key mechanisms of pulmonary arterial hypertension (PAH). Despite the multiple combination therapy, a considerable number of patients develop severe pulmonary hypertension (PH) because of
The regulation of erythropoiesis by selenium in mice.
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Redox modulation by antioxidants, such as selenium (Se), has emerged as an important regulator of erythropoiesis. Using Se-deficient (0.04 ppm), Se-adequate (0.1 ppm), and Se-supplemented (0.4 ppm) C57/BL6 mice, we show that Se deficiency caused anemia, when compared to the Se-supplemented and
Identification of novel genes expressed in hypoxic brain condition by fluorescence differential display.
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Fluorescence differential display (FDD) and comparative RT-PCR have been used extensively to detect differentially expressed genes. We investigated hypoxia-induced gene expression in the brain by FDD-PCR and comparative RT-PCR. Mice were anaesthetized after which hypoxia was induced by neck ligation
The thioredoxin reductase/thioredoxin system: novel redox targets for cancer therapy.
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Thioredoxin reductase (TRX) is a selenoprotein that reduces oxidized protein substrates in an NADPH-dependent process (cf. Fig. 1). The thioredoxins (TX) are a family of small redox active proteins that undergo reversible oxidation/reduction and help to maintain the redox state of cells. TX serves
Myocardial ischemia-reperfusion injury, antioxidant enzyme systems, and selenium: a review.
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Coronary heart disease (CHD) remains the greatest killer in the Western world, and although the death rate from CHD has been falling, the current increased prevalence of major risk factors including obesity and diabetes, suggests it is likely that CHD incidence will increase over the next 20 years.
Selenium-Binding Protein 1 Indicates Myocardial Stress and Risk for Adverse Outcome in Cardiac Surgery.
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Selenium-binding protein 1 (SELENBP1) is an intracellular protein that has been detected in the circulation in response to myocardial infarction. Hypoxia and cardiac surgery affect selenoprotein expression and selenium (Se) status. For this reason, we decided to analyze circulating SELENBP1
Methionine sulfoxide reductases and methionine sulfoxide in the subterranean mole rat (Spalax): characterization of expression under various oxygen conditions.
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The blind subterranean mole rat (Spalax ehrenbergi) exhibits a relatively long life span, which is attributed to an efficient antioxidant defense affording protection against accumulation of oxidative modifications of proteins. Methionine residues can be oxidized to methionine sulfoxide (MetO) and
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