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The role of oxidative stress and hypoxia in renal disease

Honda T, Hirakawa Y, Nangaku M

Oxygen is required to sustain aerobic organisms. Reactive oxygen species (ROS) are constantly released during mitochondrial oxygen consumption for energy production. Any imbalance between ROS production and its scavenger system...
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Neuregulin-1 Protects Neuronal Cells Against Damage due to CoCl2-Induced Hypoxia by Suppressing Hypoxia-Inducible Factor-1α and P53 in SH-SY5Y Cells

Yoo SY, Yoo JY, Kim HB, Baik TK, Lee JH, Woo RS

PURPOSE: Hypoxia-mediated neurotoxicity contributes to various neurodegenerative disorders, including Alzheimer disease. Neuregulin-1 (NRG1) plays an important role in the development and plasticity of the brain. The aim of the present...
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Low-Frequency Intermittent Hypoxia Suppresses Subcutaneous Adipogenesis and Induces Macrophage Polarization in Lean Mice

Wang Y, Lee MY, Mak JC, Ip MS

BACKGROUND: The relationship between obstructive sleep apnoea (OSA) and metabolic disorders is complex and highly associated. The impairment of adipogenic capacity in pre-adipocytes may promote adipocyte hypertrophy and increase the...
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Long Noncoding RNA MALAT1 Regulates Hepatocellular Carcinoma Growth Under Hypoxia via Sponging MicroRNA-200a

Zhao ZB, Chen F, Bai XF

PURPOSE: Hepatocellular carcinoma (HCC) is a common cancer worldwide. Metastasis-associated lung adenocarcinoma transcript 1 (MALAT1), a long noncoding RNA (lncRNA), has been reported to be aberrantly expressed in hypoxic cancer...
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New prehospital scoring system for traumatic brain injury to predict mortality and severe disability using motor Glasgow Coma Scale, hypotension, and hypoxia: a nationwide observational study

Gang MC, Hong KJ, Shin SD, Song KJ, Ro YS, Kim TH, Park JH, Jeong J

OBJECTIVE: Assessing the severity of injury and predicting outcomes are essential in traumatic brain injury (TBI). However, the respiratory rate and Glasgow Coma Scale (GCS) of the Revised Trauma Score...
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Effect of Nocturnal Hypoxia on Nocturia in Patients With Obstructive Sleep Apnea

Chung JH, Moon HS, Park SY, Kim KR, Cho SH, Kim YT

PURPOSE: To identify the association between nocturia and obstructive sleep apnea (OSA), we compared results of polysomnography (PSG) with the presence or absence of nocturia in patients with suspected OSA. METHODS:...
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Insights into Hypoxia: Non-invasive Assessment through Imaging Modalities and Its Application in Breast Cancer

Daimiel I

Oxygen is crucial to maintain the homeostasis in aerobic cells. Hypoxia is a condition in which cells are deprived of the oxygen supply necessary for their optimum performance. Whereas oxygen...
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Induction of Angiogenesis by Malarial Infection through Hypoxia Dependent Manner

Park MK, Ko EJ, Jeon KY, Kim H, Jo JO, Baek KW, Kang YJ, Choi YH, Hong Y, Ock MS, Cha HJ

Malarial infection induces tissue hypoxia in the host through destruction of red blood cells. Tissue hypoxia in malarial infection may increase the activity of HIF1α through an intracellular oxygen-sensing pathway....
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Effects of Bicycle Ergometer Exercise on Cerebral Blood Flow Velocity and Electroencephalogram Response in Normoxia and Hypoxia

Kim SD, Kim MW, Jeong IG

BACKGROUND: The cerebral blood flow velocity (CBFV) has been known to increase in response to acute hypoxia. However, how CBFV might respond to exercise in hypoxic conditions and be associated...
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Clinical Features of Critical Congenital Heart Disease in Term Infants with Hypoxemia: A Single-Center Study in Korea

Choi EK, Shin JH, Jang GY, Choi BM

PURPOSE: This study was performed to determine the clinical features of full-term infants with hypoxemia detected by pulse oximetry and to establish the diagnosis of critical congenital heart disease (CCHD). METHODS:...
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Effects of Antioxidant Tempol on Systematic Inflammation and Endothelial Apoptosis in Emphysematous Rats Exposed to Intermittent Hypoxia

Zhao H, Zhao Y, Li X, Xu L, Jiang F, Hou W, Dong L, Cao J

PURPOSE: Obstructive sleep apnea and chronic obstructive pulmonary disease are independent risk factors of cardiovascular disease (CVD), and their coexistence is known as overlap syndrome (OS). Endothelial dysfunction is the...
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Effects of Oncostatin M on Invasion of Primary Trophoblasts under Normoxia and Hypoxia Conditions

Wie JH, Ko HS, Choi SK, Park IY, Kim A, Kim HS, Shin JC

PURPOSE: To investigate the effect of oncostatin M (OSM) on protein expression levels and enzymatic activities of matrix metalloprotainase (MMP)-2 and MMP-9 in primary trophoblasts and the invasiveness thereof under...
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β-arrestin2 Affects Cardiac Progenitor Cell Survival through Cell Mobility and Tube Formation in Severe Hypoxia

Seo SK, Kim N, Lee JH, Kim SM, Lee SY, Bae JW, Hwang KK, Kim DW, Koch WJ, Cho MC

BACKGROUND AND OBJECTIVES: β-arrestin2 (β-arr2) basically regulates multiple signaling pathways in mammalian cells by desensitization and internalization of G-protein coupled receptors (GPCRs). We investigated impacts of β-arr2 on survival, mobility,...
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Global and Regional Ventilation during High Flow Nasal Cannula in Patients with Hypoxia

Lee DH, Kim EY, Seo GJ, Suh HJ, Huh JW, Hong SB, Koh Y, Lim CM

BACKGROUND: High flow nasal cannula (HFNC) is known to increase global ventilation volume in healthy subjects. We sought to investigate the effect of HFNC on global and regional ventilation patterns...
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Changes of hemodynamic and cerebral oxygenation after exercise in normobaric and hypobaric hypoxia: associations with acute mountain sickness

Kammerer T, Faihs V, Hulde N, Bayer A, Hübner M, Brettner F, Karlen W, Kröpfl JM, Rehm M, Spengler C, Schäfer S

OBJECTIVE: Normobaric (NH) and hypobaric hypoxia (HH) are associated with acute mountain sickness (AMS) and cognitive dysfunction. Only few variables, like heart-rate-variability, are correlated with AMS. However, prediction of AMS...
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Hypoxia Enhances Cell Properties of Human Mesenchymal Stem Cells

Kwon SY, Chun SY, Ha YS, Kim DH, Kim J, Song PH, Kim HT, Yoo ES, Kim BS, Kwon TG

Atmospheric (in vitro) oxygen pressure is around 150 mm Hg (20% O₂), whereas physiologic (in vivo) oxygen pressure ranges between 5 and 50 mm Hg (0.7–7% O₂). The normoxic environment...
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The role of hypoxia on the acquisition of epithelial-mesenchymal transition and cancer stemness: a possible link to epigenetic regulation

Yeo CD, Kang N, Choi SY, Kim BN, Park CK, Kim JW, Kim YK, Kim SJ

A hypoxic microenvironment leads to cancer progression and increases the metastatic potential of cancer cells within tumors via epithelial-mesenchymal transition (EMT) and cancer stemness acquisition. The hypoxic response pathway can...
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Increased Expression of Thymosin β₄ Is Independently Correlated with Hypoxia Inducible Factor-1α (HIF-1α) and Worse Clinical Outcome in Human Colorectal Cancer

Lee SY, Park MJ, Lee HK, Son HJ, Kim CN, Kim JH, Kang DW

BACKGROUND: Thymosin β₄ is a multi-functional hormone-like polypeptide, being involved in cell migration, angiogenesis, and tumor metastasis. This study was undertaken to clarify the clinicopathologic implications of thymosin β₄ expression...
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Tumor hypoxia and reoxygenation: the yin and yang for radiotherapy

Hong BJ, Kim J, Jeong H, Bok S, Kim YE, Ahn GO

Tumor hypoxia, a common feature occurring in nearly all human solid tumors is a major contributing factor for failures of anticancer therapies. Because ionizing radiation depends heavily on the presence...
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Hypoxia Enhances Osteogenic Differentiation in Retinoic Acid-Treated Murine-Induced Pluripotent Stem Cells

Manokawinchoke J, Osathanon , Egusa H, Pavasant P

Hypoxic condition influences biological responses in various cell types. However, a hypoxic regulating osteogenic differentiation remains controversy. Here, an influence of short-term culture in hypoxic condition on osteogenic marker gene...
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