phyla/hypoxia

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Phylogenetic conservation of freshwater lake habitat preference varies between abundant bacterioplankton phyla.

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Despite their homogeneous appearance, aquatic systems harbour heterogeneous habitats resulting from nutrient gradients, suspended particulate matter and stratification. Recent reports suggest phylogenetically conserved habitat preferences among bacterioplankton, particularly for particle-associated

Surviving anoxia: the maintenance of energy production and tissue integrity during anoxia and reoxygenation

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The development of anoxia within tissues represents a significant challenge to most animals because of the decreased capacity for aerobic ATP production, the associated loss of essential cellular functions and the potential for detrimental tissue oxidation upon reoxygenation. Despite these

Methane oxidation coupled to nitrate reduction under hypoxia by the Gammaproteobacterium Methylomonas denitrificans, sp. nov. type strain FJG1.

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Obligate methanotrophs belonging to the Phyla Proteobacteria and Verrucomicrobia require oxygen for respiration and methane oxidation; nevertheless, aerobic methanotrophs are abundant and active in low oxygen environments. While genomes of some aerobic methanotrophs encode putative nitrogen oxide

Intermittent hypoxia alters gut microbiota diversity in a mouse model of sleep apnoea.

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We assessed whether intermittent hypoxia, which emulates one of the hallmarks of obstructive sleep apnoea (OSA), leads to altered faecal microbiome in a murine model. In vivo partial pressure of oxygen was measured in colonic faeces during intermittent hypoxia in four anesthetised mice. 10 mice were

Hypoxia regulates beta-enolase and pyruvate kinase-M promoters by modulating Sp1/Sp3 binding to a conserved GC element.

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The transcription rates of glycolytic enzyme genes are coordinately induced when cells are exposed to low oxygen tension. This effect has been described in many cell types and is not restricted to species or phyla. In mammalian cells, there are 11 distinct glycolytic enzymes, at least 9 of which are

Environmental hypoxia influences hemoglobin subunit composition in the branchiopod crustacean Triops longicaudatus.

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Hemoglobin (Hb) is a highly conserved protein that provides a vital link between environmental oxygen and its use and/or storage within an organism. While ubiquitous among vertebrates, Hb occurs frequently in invertebrate phyla as well. Many arthropod species use the copper-binding pigment

Renal denervation improves chronic intermittent hypoxia induced hypertension and cardiac fibrosis and balances gut microbiota

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Aims: Investigate the effect of renal denervation (RDN) on chronic intermittent hypoxia (CIH) induced high blood pressure (BP) and cardiac injury, and explore whether the effect is associated with gut microbiota alteration and its

Symbiodinium mitigate the combined effects of hypoxia and acidification on a noncalcifying cnidarian.

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Anthropogenic nutrient inputs enhance microbial respiration within many coastal ecosystems, driving concurrent hypoxia and acidification. During photosynthesis, Symbiodinium spp., the microalgal endosymbionts of cnidarians and other marine phyla, produce O2 and assimilate CO2 and thus potentially

The microbiota in the intestinal and respiratory tracts of naked mole-rats revealed by high-throughput sequencing.

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BACKGROUND The naked mole-rat (NMR, Heterocephalus glaber) is being bred as a novel laboratory animal due to its unique biological characteristics, including longevity, cancer resistance, hypoxia tolerance, and pain insensitivity. It is expected that differences exist between the microbiota of wild

Tauropine dehydrogenase from the starfish Asterina pectinifera (Echinodermata: Asteroidea): presence of opine production pathway in a deuterostome invertebrate.

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Tauropine dehydrogenase (tauropine:NAD oxidoreductase; TaDH) was purified to homogeneity from the body wall of the starfish Asterina pectinifera Müller at Troschel(Echinodermata: Asteroidea) by means of (NH4)2SO4 precipitation followed by column chromatographies in DEAE-cellulose, Sephadex G75,

Changes in intestinal microbiota across an altitudinal gradient in the lizard Phrynocephalus vlangalii.

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High altitude is an important driving force in animal evolution. However, the effect of altitude on gut microbial communities in reptiles has not been examined in detail. Here, we investigated the intestinal microbiota of three populations of the lizard Phrynocephalus vlangalii living at different

Possible links between extreme oxygen perturbations and the Cambrian radiation of animals.

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The role of oxygen as a driver for early animal evolution is widely debated. During the Cambrian explosion, episodic radiations of major animal phyla occurred coincident with repeated carbon isotope fluctuations. However, the driver of these isotope fluctuations and potential links to environmental

Opine dehydrogenases in marine invertebrates.

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It is well known today that opine production anaerobic pathways are analogs to the classical glycolytic pathway (lactate production pathway). These pathways, catalyzed by a group of enzymes called opine dehydrogenases (OpDHs), ensure continuous flux of glycolysis and a constant supply of ATP by

Cell nonautonomous activation of flavin-containing monooxygenase promotes longevity and health span.

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Stabilization of the hypoxia-inducible factor 1 (HIF-1) increases life span and health span in nematodes through an unknown mechanism. We report that neuronal stabilization of HIF-1 mediates these effects in Caenorhabditis elegans through a cell nonautonomous signal to the intestine, which results

The last common ancestor of animals lacked the HIF pathway and respired in low-oxygen environments.

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Animals have a carefully orchestrated relationship with oxygen. When exposed to low environmental oxygen concentrations, and during periods of increased energy expenditure, animals maintain cellular oxygen homeostasis by enhancing internal oxygen delivery, and by enabling the anaerobic production of

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