• 3- 5 Therefore, during severe hypoxia or anoxia, the cell initiates a cascade of events that leads to apoptotic cell death, thereby preventing the accumulation of cells with hypoxia induced mutations. (bmj.com)
  • Results: The H2S donors sodium hydrosulfide and sodium sulfide in pharmacological concentrations reversibly reduced cellular O2 consumption and inhibited hypoxia- but not anoxia-induced HIF-1α protein accumulation and expression of genes downstream of HIF-1 in established cell lines. (starrlifesciences.com)
  • Conclusions: We demonstrate that H2S inhibits hypoxia-induced HIF-1 activation in a VHL- and mitochondria-dependent manner. (starrlifesciences.com)
  • However, plants can experience a lower oxygen availability (hypoxia) or total absence of oxygen (anoxia) owing to flooding of the soil or as a consequence of the anatomical structure of some tissues. (ristudypost.com)
  • Plants cannot survive for long periods of time under hypoxia or anoxia, but some species can avoid or withstand anaerobiosis. (ristudypost.com)
  • Ethylene production under anoxia is prevented by the lack of oxygen, required for the conversion of 1-aminocyclopropane1-carboxylic acid (ACC) to ethylene, while production of this hormone is observed under hypoxia. (ristudypost.com)
  • Due to high rainfall, irrigation practices and/or poor soil drainage, waterlogging annually affects large areas of farmlands worldwide, and these effects result in anoxic (absence of O 2 ) soils and severe hypoxia or anoxia within crop roots. (biomedcentral.com)
  • In the article "An overview of oxygen transport in plants: diffusion and convection" author G. G. Striker summarizes how plants under hypoxia/anoxia ensure a steady oxygen supply to their cells and identifies three types of pressurized (convective) flows: humidity-induced pressurization (positive pressure), thermal osmosis (positive pressure with air flow against the heat gradient), and venturi-induced suction (negative pressure) caused by wind passing over broken culms. (deutsche-botanische-gesellschaft.de)
  • Eliprodil (1-10 mg/kg, i.p.) administered prior to ischemia, in a dose-dependent manner, attenuated the depressed ERG throughout a 48 h period. (nebraska.edu)
  • Benndorf K., Thierfelder S., Doepner B., Gebhardt C., Hirche H. Role of cardiac KATPchannels during anoxia and ischemia // News Physiol. (kiev.ua)
  • Hydrogen sulfide protected gastric epithelial cell from ischemia/reperfusion injury by Keap1 s-sulfhydration, MAPK dependent anti-apoptosis and NF-kappaB dependent anti-inflammation pathway. (esmed.org)
  • The present study investigated the temporal relationship between neuronal nitric oxide synthase (nNOS) activity and expression and the development of neuronal damage occurring during anoxia and anoxia followed by reoxygenation. (unisannio.it)
  • Selected biochemical variables in a model of neonatal anoxia in rats. (nel.edu)
  • To assess the time course of biochemical responses to neonatal anoxia. (nel.edu)
  • Neonatal anoxia was induced by placing 2-day-old rat pups into a glass chamber with 100% N(2) atmosphere, T=36.5 degrees C, for 20 minutes. (nel.edu)
  • Ten minutes after the insult, neonatal anoxia caused a threefold increase of the lactate level in serum as well as in all organs assessed, returning to control values in 2 hours. (nel.edu)
  • The results indicate disruption of aerobic metabolism in our experimental model of neonatal anoxia, as proved by sharply increasing lactate levels. (nel.edu)
  • Although the model used requires further specification, the obtained data are indicative of its usefulness in the study of neonatal anoxia. (nel.edu)
  • Navarová J, Schmidtová M, Ujházy E, Dubovický M, Mach M. Selected biochemical variables in a model of neonatal anoxia in rats. (nel.edu)
  • Genes coding for enzymes of the lipid degradation pathway are repressed by anoxia, mostly at the level of lipases, while the genes encoding b-oxidation and the glyoxylate cycle genes are unaffected or moderately induced by anoxia. (ristudypost.com)
  • The microarray results highlight the strong induction of two sucrose synthase genes, which, together with the repression of neutral invertase (At1g35580) and the activation of an invertase inhibitor, suggests that a sucrose-synthase pathway predominates for sucrose utilization under anoxia, as previously proposed for rice seedlings. (ristudypost.com)
  • The effects of anoxia on starch synthesis genes are limited, and the pathway of starch degradation is not induced under anoxia in Arabidopsis thaliana. (ristudypost.com)
  • The rate of anaerobic growth of the atypical species Brucella microti was dependent on nitrate concentration, highlighting a more efficient denitrification pathway with rapid consumption of intermediate nitrite, whereas the classical species Brucella suis exhibited lower, nitrate concentration-independent growth coupled with nitrite accumulation. (bvsalud.org)
  • The availability of molecular tools for genome-wide analyses of Arabidopsis thaliana seedlings transcriptome opens new opportunities for the study of plant responses to anoxia. (ristudypost.com)
  • In this article, we analyze the results obtained by transcript profiling of Arabidopsis seedlings under anoxia and discuss the results in relation to the existing literature on the anaerobic response of higher plants. (ristudypost.com)
  • In this review, we describe some classical aspects of the physiology of plants under limited oxygen availability, highlighting new evidence of gene modulation by anoxia arising from recent microarray experiments using Arabidopsis seedlings. (ristudypost.com)
  • Although the role of Ahb1 in the physiology of plants is still largely unknown, it has been proposed that Ahb1 may be functioning as an NADH-dependent nitric oxide (NO) oxidizing factor, producing nitrate that is, in turn, converted back to NO by nitrate reductase. (ristudypost.com)
  • The plants found there, such as willows and poplars for example, are closely dependent on disturbance for their spread and reproduction. (encyclopedie-environnement.org)
  • In the article "Evolution of a non-flying mammal-dependent pollination system in Asian Mucuna (Fabaceae)" author S. Kobayashi summarizes the available knowledge of pollination in Asian Mucuna (Fabaceae), a genus mainly distributed in the tropics, and discusses the evolution of plants pollinated by non-flying mammals in Asia. (deutsche-botanische-gesellschaft.de)
  • The contractile processes of cardiac muscle and vascular smooth muscle are dependent upon the movement of extracellular calcium ions into these cells through specific ion channels. (nih.gov)
  • Pathogen suppression appears to be carbon-source dependent and mediated by bacteria that produce volatile organic compounds and physical and chemical changes in the soil, such as elevated temperature, lowered pH and redox potential, etc. (usda.gov)
  • Pathogen suppression appears to be carbon source-dependent and mediated by bacteria that proliferate and produce volatile organic compounds, as well as physico-chemical changes (i.e., elevated temperature, lowered redox potential and pH, release of metal ions) in soil. (usda.gov)
  • Rice bran is the standard carbon source for ASD and we identified three other substrates (molasses, mustard seed meal, and tomato pomace) that are similar in efficacy to rice bran at generating and sustaining soil anoxia and reducing the population of an introduced plant pathogen. (usda.gov)
  • Remarkably, nitrate reductase1 (NR1, At1g77760) is induced by anoxia. (ristudypost.com)
  • grow well under anoxia, but in a strictly nitrate-dependent manner, whereas classical species show a heterogeneous behavior. (bvsalud.org)
  • The production of alanine is indeed relevant in rice roots, reaching up to 1.2% of the dry weight after 24 hr under anoxia. (ristudypost.com)
  • A hypoxic environment devoid of nutrients prevents the cell undergoing energy dependent apoptosis and cells become necrotic. (bmj.com)
  • Wearing a bra, especially a constricting one with under wires and if worn to bed, prevents normal lymphatic flow and would likely lead to anoxia (lower than normal oxygen content), which has been related to fibrosis, which has been linked to increased cancer risk. (drsircus.com)
  • Reversible heme-dependent regulation of human cystathionine beta-synthase by a flavoprotein oxidoreductase. (esmed.org)
  • The types of processes that bring about anoxia are relatively well understood. (blogspot.com)
  • The microbial community is exposed to different electron acceptors and donors in these microenvironments dependent on the advective transport regime. (nature.com)
  • Farm well discharge and farm net recharge are source/sink terms in the FMP1, which depend on transpiration uptake from ground water and other head dependent consumptive use components. (usgs.gov)
  • Experimental evidence adopting von Hippel-Lindau (VHL)- or mitochondria-deficient cells indicated that H2S did not affect neosynthesis of HIF-1α protein but destabilized HIF-1α in a VHL- and mitochondria-dependent manner. (starrlifesciences.com)
  • Specifically, we find that GABA concentration increases under a water deficit and this reduces stomatal opening in an ALMT9-dependant manner. (nature.com)
  • Adeagbo A.S., Malik K.U. Contribution of K+ channels to arachidonik acid-inducedendothelium-dependent vasodilation in rat isolated perfused mesenteric arteries //J. Pharmacol. (kiev.ua)
  • An investigation was also made of the duration of survival of ammocoetes under deoxygenated conditions as Blažka (1958) has shown that another lower vertebrate, the Crucian carp, is able to tolerate anoxia for up to 2 months at a low temperature (5°C). Since emergence may be dependent upon the amount of carbon dioxide in the water, a preliminary investigation was also made into the effects of this gas. (silverchair.com)
  • however, eliprodil did not prevent anoxia-induced in vitro RGC cell death. (nebraska.edu)
  • Dunne M.J., Illot M.C., Peterson O.H. Interaction of diazoxide, tolbutamide andATP4- on nucleotide-dependent K+ channels in an insulin-secreting cell line // J. Membr.Biol. (kiev.ua)
  • The profile of glutathione in the liver showed a time-dependent rise observed in both groups. (nel.edu)
  • for example, during several transient Cretaceous events, anoxia spanned much of what is now the Atlantic Ocean or maybe even almost all of the ancient oceans. (blogspot.com)
  • This is followed by a similar exercise on human influences presently constituting the major pressures on biodiversity (not continent building, asteroids, climate, anoxia, ocean currents, etc. (confex.com)
  • Massive release of hydrogen sulfide to the surface ocean and atmosphere during intervals of oceanic anoxia. (esmed.org)
  • Oxygen is crucial for generation of the ATP needed to drive secondary energy-dependent ion transport. (biomedcentral.com)
  • Besides the important role of fermentative metabolism, the AHB/NR1-dependent NADH utilization can be useful to regenerate nicotinamide adenine dinucleotide (NAD) under anoxia. (ristudypost.com)
  • For heads rising above the bottom of the root zone, the actual transpiration is taken to vary proportionally with the depth of the active root zone, which can be restricted by anoxia or wilting. (usgs.gov)
  • Depths corresponding to anoxia- or wilting-related pressure heads within the root zone are found using analytical solutions of a vertical pseudo steady-state pressure- head distribution over the depth of the total root zone (Consumptive Use Concept 1). (usgs.gov)
  • The population includes active military personnel (43,000) and their dependents (52,000). (cdc.gov)
  • Irrigation demand, supply, and return flow are in part subject to head-dependent sources and sinks such as evapotranspiration from ground water and leakage between the conveyance system and the aquifer. (usgs.gov)
  • Lymphatic circulation in many tissues (especially the primary lymphatics) are highly dependent on movement. (drsircus.com)