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Pàgina 1 des de 129 resultats
Dietary polyunsaturated fatty acids, vitamin E and hypoxia/reoxygenation-induced damage to cardiac tissue.
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Polyunsaturated fatty acids (PUFA), in the form of marine oils, contain a large proportion of n-3 long chain fatty acids and have been recommended as a dietary supplement for patients with ischaemic heart disease. It has also been suggested that consumption of diets rich in polyunsaturated fatty
Influence of phospholipid long chain polyunsaturated fatty acid composition on neonatal rat cardiomyocyte function in physiological conditions and during glucose-free hypoxia-reoxygenation.
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There is evidence that dietary polyunsaturated fatty acids (PUFA) may protect against cardiovascular diseases, but the involvement of the cardiac muscle cell in this beneficial action remain largely unknown. The present study compared the respective influence of n-3 and n-6 PUFA on the function of
Non-esterified polyunsaturated fatty acids distinctly modulate the mitochondrial and cellular ROS production in normoxia and hypoxia.
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There is an intense discussion about the subcellular origin of the generation of reactive oxygen species (ROS) under hypoxia. Since this fundamental question can be addressed only in a cellular system, the O(2) -sensing rat pheochromocytoma (PC12) cells were used. Severe hypoxia is known to elevate
Eicosanoid synthesis in cardiomyocytes: influence of hypoxia, reoxygenation, and polyunsaturated fatty acids.
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The synthesis of eicosanoids was investigated in cultured rat ventricular myocytes. Under normoxia, the cardiomyocytes released 6-ketoprostaglandin F1 alpha (6-keto-PGF1 alpha) and prostaglandin (PG) E2 and smaller amounts of PGF2 alpha and thromboxane B2. Hypoxia enhanced the production of PGE2 and
Hypoxia-reoxygenation and polyunsaturated fatty acids modulate adrenergic functions in cultured cardiomyocytes.
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The polyunsaturated fatty acids (PUFAs) of the omega 3 series are known to modulate adrenergic functions in ventricular myocytes. This study evaluated the influence of hypoxia duration and PUFA composition on the ability of cultured rat cardiomyocytes in producing alpha- and beta-adrenergic
Polyunsaturated fatty acids influence prostanoid synthesis in vascular endothelial cells under hypoxia and reoxygenation.
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We studied the influence of membrane polyunsaturated fatty acids (PUFA) on prostanoid metabolism in the vascular endothelium, in pathophysiological conditions. Two models of cultured endothelial cells were used, from bovine aorta (BAEC) and human umbilical vein (HUVEC). In physiological conditions,
Chronic cellular hypoxia as the prime cause of cancer: what is the de-oxygenating role of adulterated and improper ratios of polyunsaturated fatty acids when incorporated into cell membranes?
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With the exception of melanoma and non-Hodgkin's lymphoma, the incidence of cancer has peaked in the last several years, but rates and mortality are still high. Moreover, despite 50 years of intensive cancer research increasingly focused on genetic causes, no single unifying cause for cancer has
Cross-influence of membrane polyunsaturated fatty acids and hypoxia-reoxygenation on alpha- and beta-adrenergic function of rat cardiomyocytes.
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The purpose of the present investigation was to determine whether the beneficial effects of polyunsaturated fatty acids (PUFA) may influence ischemia-reperfusion-induced alterations of myocardial alpha- and beta-adrenoceptor (alpha-AR, beta-AR) responsiveness. This study was carried out using
The consumption of n-3 polyunsaturated fatty acids differentially modulates gene expression of peroxisome proliferator-activated receptor alpha and gamma and hypoxia-inducible factor 1 alpha in subcutaneous adipose tissue of obese adolescents.
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The aim of this study was to evaluate the effect of long-chain omega-3 polyunsaturated fatty acid (n-3 PUFA) supplementation on metabolic state and gene expression in subcutaneous adipose tissues of obese adolescents. Obese adolescents (n = 26, 10 girls and 16 boys) aged 12.4 ± 2.1 years were
Co-Enzyme Q10 and n-3 Polyunsaturated Fatty Acid Supplementation Reverse Intermittent Hypoxia-Induced Growth Restriction and Improved Antioxidant Profiles in Neonatal Rats.
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Neonatal intermittent hypoxia (IH) increases the risk for many morbidities in extremely low birth weight/gestational age (ELBW/ELGA) neonates with compromised antioxidant systems and poor growth. We hypothesized that supplementation with coenzyme Q10 (CoQ10, ubiquinol) or n-3 polyunsaturated fatty
Maternal dietary supplementation with omega-3 polyunsaturated fatty acids confers neuroprotection to the newborn against hypoxia-induced dopamine dysfunction.
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BACKGROUND
Up to 84% of prematurely born infants suffer hypoxic, anoxic, and ischemic insults. Those infants with subsequent behavioral, motor or cognitive dysfunction represent 8-11% of all live births. Yet, no interventions employed during pregnancy attenuate risk of morbidity in those at-risk
Dietary polyunsaturated fatty acids and adaptation to chronic hypoxia alter acyl composition of serum and heart lipids.
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The effects of dietary supplementation with fat of different fatty acid profile and chronic intermittent hypoxia (CIH) on the fatty acid composition of serum and heart lipids were analysed. Adult male Wistar rats were fed a standard non-fat diet enriched with 10 % of lard, fish oil (n-3 PUFA) or
Dietary polyunsaturated fatty acids alter myocardial protein kinase C expression and affect cardioprotection induced by chronic hypoxia.
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We examined the influence of dietary fatty acid (FA) classes on the expression of protein kinase C (PKC) delta and epsilon in relation to the cardioprotective effects of chronic intermittent hypoxia (CIH). Adult male Wistar rats were fed a nonfat diet enriched with 10% lard (saturated FA [SFA]),
Alterations of N-3 polyunsaturated fatty acid-activated K2P channels in hypoxia-induced pulmonary hypertension.
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Polyunsaturated fatty acid (PUFA)-activated two-pore domain potassium channels (K2P ) have been proposed to be expressed in the pulmonary vasculature. However, their physiological or pathophysiological roles are poorly defined. Here, we tested the hypothesis that PUFA-activated K2P are involved in
Influence of polyunsaturated fatty acid diet on the hemorrheological response to physical exercise in hypoxia.
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Several studies have shown that hemorrheological parameters are modified by physical exercise and exposure to altitude hypoxia. These changes result in a decrease in red cell deformability (RCD). Similarly, it has been shown that a daily dietary fish oil supplement increases RCD. The purpose of this
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