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Pàgina 1 des de 130416 resultats
Behavioral, cognitive and histological changes following neonatal anoxia: Male and female rats' differences at adolescent age.
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Neonatal anoxia induces long-term brain injury that may underlie neurobehavioral deficits at adolescence. Neonatal anoxia, induced by exposure of 30-hour old pups to 100% nitrogen, represents a non-invasive and global stimulus, which simulates clinical conditions of human pre-term babies (around 6
Effects of ketamine on the fetal transcriptomic response to umbilical cord occlusion: comparison with hypoxic hypoxia in the cerebral cortex.
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CONCLUSIONS
The cerebral response to fetal asphyxia is characterized by an upregulation of nucleic acid and chromatin modification processes, as well as a downregulation of metabolic processes at 1 h post-umbilical cord occlusion (UCO). Twenty-four hours post UCO, there was an upregulation of
Post-hypoxia Invasion of the fetal brain by multidrug resistant Staphylococcus.
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Herein we describe an association between activation of inflammatory pathways following transient hypoxia and the appearance of the multidrug resistant bacteria Staphylococcus simulans in the fetal brain. Reduction of maternal arterial oxygen tension by 50% over 30 min resulted in a subseiuent
Angiotensin-(1-7) relieved renal injury induced by chronic intermittent hypoxia in rats by reducing inflammation, oxidative stress and fibrosis.
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We aimed to study the renal injury and hypertension induced by chronic intermittent hypoxia (CIH) and the protective effects mediated by angiotensin 1-7 [Ang(1-7)]. We randomly assigned 32 male Sprague-Dawley rats (body weight 180-200 g) to normoxia control, CIH, Ang(1-7)-treated normoxia, and
Accelerated growth of hemangioblastoma in pregnancy: the role of proangiogenic factors and upregulation of hypoxia-inducible factor (HIF) in a non-oxygen-dependent pathway.
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Hemangioblastomas (HBs) are benign, highly vascular tumors, often characterized by loss of function of the von Hippel-Lindau (vHL) gene. They are the most common central nervous system tumor observed in vHL syndrome. Loss of function of the vHL gene creates a "pseudo-hypoxic" state, causing
Periostin contributes to arsenic trioxide resistance in hepatocellular carcinoma cells under hypoxia.
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Hypoxia has been suggested to induce chemoresistance in tumor cells. In this study, we aimed to test the hypothesis that hypoxia-inducible factor-1alpha (HIF-1α)/periostin axis might promote arsenic trioxide resistance in hepatocellular carcinoma (HCC) cells under hypoxia. HCC cells were exposed to
Instability of the carbon dioxide stimulus under the "mixed venous isocapnic" conditions advocated for testing the ventilatory response to hypoxia.
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Meaningful and reproducible ventilatory responses to hypoxia cannot be obtained from the mixed venous isocapnic test reported by Rebuck and Campbell if it is not recognized that the CO2 drive increases progressively for at least 6 to 10 min after the PCO2 step.
The ventilatory response to hypoxia below the carbon dioxide threshold.
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The ventilatory response to acute progressive hypoxia below the carbon dioxide threshold using rebreathing was investigated. Nine subjects rebreathed after 5 min of hyperventilation to lower carbon dioxide stores. The rebreathing bag initially contained enough carbon dioxide to equilibrate alveolar
Protective effect of sphingosine-1-phosphate for chronic intermittent hypoxia-induced endothelial cell injury.
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Intermittent hypoxia (IH) induced by obstructive sleep apnea (OSA) is the key factor in oxidative stress and the concomitant inflammation of endothelial cells (ECs). In recent years, the lipid sphingosine-1-phosphate (S1P) has been reported to probably play a central role in inflammatory diseases.
Toll-like receptors 2, 4 and 9 and hypoxia markers HIF-1alpha and CAIX in pancreatic intraepithelial neoplasia.
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Pancreatic cancer arises from precursor lesions called pancreatic intraepithelial neoplasia (PanIN) characterized by inflammatory microenvironment. In pancreatic cancer, strong innate immunity and hypoxia responses are typical. Occurrence and relationship of these responses in human PanINs is
Sleep apnoea related hypoxia is associated with cognitive disturbances in patients with tetraplegia.
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Sleep disordered breathing is common in patients with tetraplegia. Nocturnal arterial hypoxemia and sleep fragmentation due to sleep apnoea may be associated with cognitive dysfunction. We therefore studied the influence of sleep disordered breathing on neuropsychological function in 37
Heat shock protein 70 protects PC12 cells against ischemia-hypoxia/reoxygenation by maintaining intracellular Ca(2+) homeostasis.
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Heat shock protein 70 (HSP70) maintains Ca(2+) homeostasis in PC12 cells, which may protect against apoptosis; however, the mechanisms of neuroprotection are unclear. Therefore, in this study, we examined Ca(2+) levels in PC12 cells transfected with an exogenous lentiviral HSP70 gene expression
Proliferation and apoptosis property of mesenchymal stem cells derived from peripheral blood under the culture conditions of hypoxia and serum deprivation.
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BACKGROUND
The proliferation and apoptosis property of mesenchymal stem cells derived from peripheral blood (PB-MSCs) were investigated under hypoxia and serum deprivation conditions in vitro so as to evaluate the feasibility for autologous PB-MSCs applications in cartilage repair.
METHODS
MSCs were
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
Hypoxia-inducible factors regulate filaggrin expression and epidermal barrier function.
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A functional epidermal skin barrier requires the formation of a cornified envelope from terminally differentiating keratinocytes. During this process, multiple genetic and environmental signals coordinately regulate protein expression and tissue differentiation. Here we describe a critical role for
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