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Suppression of hypoxia-inducible factor-1α contributes to the antiangiogenic activity of red propolis polyphenols in human endothelial cells.

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Polyphenol-enriched fractions from natural sources have been proposed to interfere with angiogenesis in pathological conditions. We recently reported that red propolis polyphenols (RPP) exert antiangiogenic activity. However, molecular mechanisms of this activity remain unclear. Here, we aimed at

Supplementation with a synthetic polyphenol limits oxidative stress and enhances neuronal cell viability in response to hypoxia-re-oxygenation injury.

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Oxidative stress is associated with the pathology of acute and chronic neurodegenerative disease. Cultured human neuronal cells exposed to experimental hypoxia-re-oxygenation (H/R) injury responded with an increased production of reactive oxygen species (ROS) and a significant decrease in

Protective effects of tea polyphenols on mild hypobaric hypoxia induced pulmonary free radical metabolic disorder in mice.

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Objective. To observe the protective effects of natural antioxidant tea polyphenols (TP) on repeated mild hypobaric hypoxia induced pulmonary free radical metabolic disorder in mice. Method. Fourty-two male Kunming mice were randomly divided into three groups (n=14 each): normal control (A); 1500 in

Polyphenol epigallocatechin-3-gallate inhibits hypoxia/reoxygenation-induced H9C2 cell apoptosis.

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BACKGROUND We aimed to observe the protective effect of EGCG on hypoxia/reoxygenation injury of H9C2 myocardial cells and to study the inhibition mechanism of EGCG on hypoxia/reoxygenation injury of H9C2 myocardial cells. METHODS H9C2 cells were used as the objects of study and hypoxia/reoxygenation

Apple polyphenol relieves hypoxia-induced pulmonary arterial hypertension via pulmonary endothelium protection and smooth muscle relaxation: In vivo and in vitro studies.

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OBJECTIVE This study aims to test the effect of apple polyphenol (APP) on hypoxia-induced pulmonary arterial hypertension (PAH) and explore its possible underlying mechanisms. RESULTS Rats were treated with control, APP, hypoxia (8 h/d), hypoxia + APP. Mean pulmonary arterial pressure (mPAP) and

Green tea catechin polyphenols attenuate behavioral and oxidative responses to intermittent hypoxia.

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BACKGROUND The intermittent hypoxia (IH) that characterizes sleep-disordered breathing impairs spatial learning and increases NADPH oxidase activity and oxidative stress in rodents. We hypothesized that green tea catechin polyphenols (GTPs) may attenuate IH-induced neurobehavioral deficits by

Effects of polyphenol extract from olive pomace on anoxia-induced endothelial dysfunction.

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Anoxia modulates the expression of molecules associated with endothelial dysfunction and vascular diseases. Polyphenols have potent antioxidant properties due to their ability to modulate genes involved in oxidative tissue damage. In this study, we investigated the effect of polyphenol extract from

Maternal alcoholism and neonatal hypoxia-ischemia: neuroprotection by stilbenoid polyphenols.

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The impact of maternal nutrition on neurodevelopment and neonatal neuroprotection is a research topic with increasing interest. Maternal diet can also have deleterious effects on fetal brain development. Fetal exposure to alcohol is responsible for poor neonatal global development, and may increase

Effects of Polyphenol Compounds and Nitrogen Oxide Donors on Lipid Oxidation, Membrane-Skeletal Proteins, and Erythrocyte Structure under Hypoxia.

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This study shows that membrane-associated cytoskeletal protein structures and the erythrocyte morphology undergo profound changes during hypoxia. Hypoxia also intensified oxidative processes in the lipid phase of the bilayer of red blood cell membranes. Sodium nitroprusside impaired the morphology

Resveratrol, a polyphenol phytoalexin, protects cardiomyocytes against anoxia/reoxygenation injury via the TLR4/NF-κB signaling pathway.

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Previous studies indicate resveratrol pretreatment can protect cardiomyocytes. However, it is largely unknown whether resveratrol protects cardiomyocytes when applied at reperfusion. The purpose of this study was to investigate whether resveratrol given at reoxygenation could protect cardiomyocytes

Punicalagin, a polyphenol in pomegranate juice, downregulates p53 and attenuates hypoxia-induced apoptosis in cultured human placental syncytiotrophoblasts.

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Oxidative stress is associated with placental dysfunction and suboptimal pregnancy outcomes. Therapeutic interventions to limit placental injury from oxidative stress are lacking. Punicalagin is an ellagitannin and a potent antioxidant in pomegranate juice. We showed that both pomegranate juice and

Controlling pathogenesis in Candida albicans by targeting Efg1 and Glyoxylate pathway through naturally occurring polyphenols.

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Candida albicans has frequently shown resistance to azoles, the commonly used antifungal drugs. Efg1 has dual role under normoxia and hypoxia supporting infection. It is the major regulator of morphogenesis in C. albicans requisite for its pathogenesis. Targeting this protein is expected to render

Identification of microRNAs involved in the modulation of pro-angiogenic factors in atherosclerosis by a polyphenol-rich extract from propolis.

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New vessel formation plays a critical role in the progression and vulnerability of atherosclerotic lesions. It has been shown that polyphenols from propolis attenuate the progression of atherosclerosis and also exert inhibitory effects on angiogenic factors. However, the mechanisms underlying these

In vitro neuroprotection by novel antioxidants in guinea-pig urinary bladder subjected to anoxia-glucopenia/reperfusion damage.

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In a previous study, the neuroprotection provided by some hindered phenols of synthetic nature and alpha-tocopherol in guinea-pig detrusor strips subjected to ischaemia/reperfusion-like conditions was shown to be related directly to the antioxidant activity. The aim of the present study was to

Cancer therapeutic agents targeting hypoxia-inducible factor-1.

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The discovery of hypoxia-inducible factor-1 has led to a rapidly increasing understanding of the molecular mechanism of tumor hypoxia in the past two decades. Today it is generally accepted that HIF-1 plays a pivotal role in the cellular response to tumor hypoxia which represents a major obstacle to

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