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superoxide dismutase/hypoxia
Link salvestatakse lõikelauale
Leht 1 alates 1622 tulemused
Overexpression of extracellular superoxide dismutase protects against brain injury induced by chronic hypoxia.
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Extracellular superoxide dismutase (EC-SOD) is an isoform of SOD normally found both intra- and extra-cellularly and accounting for most SOD activity in blood vessels. Here we explored the role of EC-SOD in protecting against brain damage induced by chronic hypoxia. EC-SOD Transgenic mice, were
Beta-adrenergic receptor stimulation and adenoviral overexpression of superoxide dismutase prevent the hypoxia-mediated decrease in Na,K-ATPase and alveolar fluid reabsorption.
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Logi sisse
Hypoxia has been shown to cause lung edema and impair lung edema clearance. In the present study, we exposed isolated rat lungs to pO(2) = 40 mm Hg for 60 min or rats to 8% O(2) for up to 24 h and then measured changes in alveolar fluid reabsorption (AFR) and Na,K-ATPase function. Low levels of
Superoxide dismutase functional regulation in neonatal hypoxia: effect of glucose, oxygen and epinephrine.
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Hypoxia is one of the major causes of damage to the fetal and neonatal brain and cardiac functions. In earlier studies, we have reported the brain damage caused by hypoxia and resuscitation with oxygen and epinephrine and have found that glucose treatment to hypoxic rats and hypoxic rats treated
Impaired tolerance to repetitive hypoxia in hippocampal slices of Cu,Zn superoxide dismutase transgenic mice.
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Energy metabolism is impaired in the Cu,Zn superoxide dismutase transgenic mouse model of amyotrophic lateral sclerosis. The goal was to investigate tolerance against single and repetitive hypoxia in C57B6SJL-TgN(SOD1-G93A)1GUR mice (G93A mice). Posthypoxic recovery (15 min hypoxia, 45 min recovery)
Effect of hyperoxia, hypoxia, and maturation on superoxide dismutase activity in isolated alveolar macrophages.
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The influence of ambient O2 tensions and of cell maturation on superoxide dismutase activity were studied in tissue culture--maintained mouse alveolar macrophages. Cultivation under hyperoxic conditions (PO2 about 640 mmHg) for 24 hours was associated with a significant increase in superoxide
Superoxide dismutase ameliorates neuronal death from hypoxia in culture.
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OBJECTIVE
Studies showing efficacy with free radical scavengers have been conflicting, and when protection was demonstrated it was attributed to action at the level of the vascular endothelium. The purpose of this study was to test the hypotheses that neuronal free radical formation plays a role in
Prolonged hypoxia during cell development protects mature manganese superoxide dismutase-deficient astrocytes from damage by oxidative stress.
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Logi sisse
Mouse astrocytes deficient in the mitochondrial form of superoxide dismutase do not grow in culture under 20% atmospheric O2 levels. By flow cytometry, immunocytochemistry, and enzymatic analysis we have shown that the oxygen block of cell division is due to a decrease in the number of cells
Threefold exposure to moderate hypobaric hypoxia decreases the expression of Cu,Zn-superoxide dismutase in some regions of rat hippocampus.
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The effect of moderate hypobaric hypoxia on the expression of a peptide antioxidant Cu,Zn-superoxide dismutase in rat hippocampal neurons was evaluated in an immunocytochemical study. The expression of Cu,Zn-superoxide dismutase decreased significantly in the dorsal hippocampus (CA1 and CA2) and
[Zinc- and copper-containing superoxide dismutase activity in rat tissues normally and in hypoxia].
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Acute hypoxic hypoxia caused a distinct decrease in activity of Zn2+, Cu2+-containing superoxide dismutase in cytosols of rat liver and brain tissues and less distinct--in liver mitochondria and microsomes, brain mitochondria and blood plasma. On the basis of the data published in the literature,
Copper/zinc superoxide dismutase transgenic brain accumulates hydrogen peroxide after perinatal hypoxia ischemia.
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Logi sisse
Unlike the mature animal, immature mice transgenic for copper/zinc superoxide dismutase (SOD1) have greater brain injury after hypoxia-ischemia than their wild-type nontransgenic littermates. To assess the role of oxidative stress in the pathogenesis of this injury, we measured histopathological
Extracellular superoxide dismutase suppresses hypoxia-inducible factor-1α in pancreatic cancer.
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Logi sisse
Hypoxia-inducible factor-1 (HIF-1) is a heterodimeric transcription factor that governs cellular responses to reduced oxygen availability by mediating crucial homeostatic processes and is a major survival determinant for tumor cells growing in a low-oxygen environment. Clinically, HIF-1α seems to be
Molecular characterization of manganese superoxide dismutase (MnSOD) from sterlet Acipenser ruthenus and its responses to Aeromonas hydrophila challenge and hypoxia stress.
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Logi sisse
A novel gene encoding the mitochondrial manganese superoxide dismutase from sterlet Acipenser ruthenus (Ar-MnSOD) was cloned. The full-length cDNA of MnSOD was of 1040 bp with a 672 bp open reading frame encoding 224 amino acids and the deduced amino acid sequence was located in mitochondria.
Study of rat hepatocytes in primary culture submitted to hypoxia and reoxygenation: action of the cytoprotectors prostaglandin E1, superoxide dismutase, allopurinol and verapamil.
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Logi sisse
Exposure of hepatocytes to pathological conditions in a microenvironment of hypoxia and reoxygenation is very frequent in hepatic diseases. Several substances present perspectives for cytoprotective action on hepatocyte submitted to reoxygenation after hypoxia and simple hypoxia.
We research
Superoxide dismutase and allopurinol prevent the pressor effects of angiotensin II and histamine in the guinea-pig isolated perfused lung exposed to hypoxia.
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Logi sisse
1. In the guinea-pig isolated perfused lung exposed to hypoxia by infusing N2-gassed Krebs solution, angiotensin II and histamine produced a reduced vasoconstrictor response when compared with the responses obtained in nonhypoxic lung. 2. These reduced vasoconstrictor responses were prevented by
Changes in reactive oxygen species, superoxide dismutase, and hypoxia-inducible factor-1α levels in missed abortion.
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This study aimed to investigate changes in the expression levels of reactive oxygen species (ROS), superoxide dismutase (SOD), and hypoxia-inducible factor-1α (HIF-1α) in the trophoblasts of patients who had experienced missed abortions. The missed abortion group included 28 patients with missed
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