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Pagina 1 a partire dal 231 risultati
Effect of chronic hypoxia and high sucrose diet on body weights and glycolytic enzyme activities in liver, heart, and gastrocnemius of Sprague-Dawley and Wistar rats.
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Pyruvate kinase and glucosephosphate isomerase activities were measured in liver, heart, and gastrocnemius of Sprague-Dawley and Wistar rats subjected to chronic hypoxia. Animals were fed Purina chow or a high sucrose diet. In terms of changes in body weight, Sprague-Dawleys acclimated better on
The Role of Sugars, Hexokinase, and Sucrose Synthase in the Determination of Hypoxically Induced Tolerance to Anoxia in Tomato Roots.
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Hypoxic pretreatment of tomato (Lycopersicon esculentum M.) roots induced an acclimation to anoxia. Survival in the absence of oxygen was improved from 10 h to more than 36 h if external sucrose was present. The energy charge value of anoxic tissues increased during the course of hypoxic
Wounding, anoxia and cold induce sugarbeet sucrose synthase transcriptional changes that are unrelated to protein expression and activity.
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Wounding, anoxia, and cold are often encountered during crop production and postharvest storage of plant products. Although the effect of these stresses on the expression of sucrose synthase, a key enzyme in the carbon metabolism of many storage organs, has been investigated in several
Expression of sucrose synthase genes involved in enhanced elongation of pondweed (Potamogeton distinctus) turions under anoxia.
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OBJECTIVE
Overwintering buds (turions) of the monocot aquatic pondweed species (Potamogeton distinctus) are highly tolerant to anoxic stress. Sucrose metabolism accompanied by enhanced activity of sucrose synthase (SuSy) operates actively during anaerobic elongation of pondweed turions. The aim of
Differential regulation of sugar-sensitive sucrose synthases by hypoxia and anoxia indicate complementary transcriptional and posttranscriptional responses
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The goal of this research was to resolve the hypoxic and anoxic responses of maize (Zea mays) sucrose (Suc) synthases known to differ in their sugar regulation. The two maize Suc synthase genes, Sus1 and Sh1, both respond to sugar and O2, and recent work suggests commonalities between these
The effect of sucrose ingestion on autonomic nervous system function in young subjects during acute moderate hypoxia.
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Cardiac arrhythmias are associated with an increase in sympathetic activity (reflected in increased heart rate) and a simultaneous decrease in rhythmical fluctuations of sympathetic activity [reflected in decreased heart rate variability (HRV)]. As hypoxia is a well known trigger for cardiac
Localization of sucrose synthase in wheat roots: increased in situ activity of sucrose synthase correlates with cell wall thickening by cellulose deposition under hypoxia.
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Sucrose synthase (SuSy; EC 2.4.1.13) plays a prominent role in O(2) deficiency and functions at a branch point, partitioning sucrose between cell wall biosynthesis and glycolysis. The cleavage of sucrose by SuSy was localized in wheat ( Triticum aestivum L. cv. Alcedo) roots subjected to 4 days of
Steady sucrose degradation is a prerequisite for tolerance to root hypoxia.
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We investigated the role of glycolysis and sucrolysis in the difference in tolerance to root hypoxia between two Myrtaceae tree species, Melaleuca cajuputi (which shows superior tolerance to root hypoxia) and Eucalyptus camaldulensis (which does not). Analysis of the adenylate energy charge (AEC) in
A genome-wide analysis of the effects of sucrose on gene expression in Arabidopsis seedlings under anoxia.
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Exogenous sucrose (Suc) greatly enhances anoxia tolerance of Arabidopsis (Arabidopsis thaliana) seedlings. We used the Affymetrix ATH1 GeneChip containing more than 22,500 probe sets to explore the anaerobic transcriptome of Arabidopsis seedlings kept under anoxia for 6 h in presence or absence of
High sucrose low copper diet in pregnant diabetic rats induces transient oxidative stress, hypoxia, and apoptosis in the offspring's liver.
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BACKGROUND
Hyperglycemia-related oxidative stress and hypoxia are important mechanisms responsible for diabetes-induced embryopathy and other complications. High sucrose low copper diet (HSD), but not regular diet (RD), induces type 2 diabetes in the inbred Cohen diabetic sensitive (CDs) rats but
Changes in regional cerebral blood flow and sucrose space after 3-4 weeks of hypobaric hypoxia (0.5 ATM).
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In summary, we can come to a number of meaningful conclusions regarding chronic exposure to hypobaric hypoxia in rats (refer to Figure 1). First, despite an increased hematocrit, and thus increased oxygen carrying capacity, regional cerebral blood flow is elevated after 4 weeks of chronic hypobaric
Neuroprotective Role of L-NG-Nitroarginine Methyl Ester (L-NAME) against Chronic Hypobaric Hypoxia with Crowding Stress (CHC) Induced Depression-Like Behaviour.
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Improper neuroimmune responses following chronic stress exposure have been reported to cause neuronal dysfunctions leading to memory impairment, anxiety and depression like behaviours. Though several factors affecting microglial activation and consequent alteration in neuro-inflammatory responses
Low levels of pyrophosphate in transgenic potato plants expressing E. coli pyrophosphatase lead to decreased vitality under oxygen deficiency.
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OBJECTIVE
The aim of this study was to investigate the importance of pyrophosphate (PPi) for plant metabolism and survival under low oxygen stress. Responses of roots of wild-type potato plants were compared with roots of transgenic plants containing decreased amounts of PPi as a result of the
Long-term potentiation protects rat hippocampal slices from the effects of acute hypoxia.
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We have previously shown that long-term potentiation (LTP) decreases the sensitivity of glutamate receptors in the rat hippocampal CA1 region to exogenously applied glutamate agonists. Since the pathophysiology of hypoxia/ischemia involves increased concentration of endogenous glutamate, we tested
Effects of hypoxia and metabolic inhibition on the intracellular sodium activity of mammalian ventricular muscle.
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1. Intracellular Na+ activity (aiNa) has been measured in Purkinje fibres from sheep heart and in ventricular muscle from rabbit heart during hypoxia and metabolic inhibition. The aiNa was measured using liquid sensor ion-sensitive microelectrodes. 2. Hypoxia, produced by replacement of O2 with N2
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