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Sida 1 från 19 resultat
Effect of hypoxia on lecithin concentration in fetal lung tissue and amniotic fluid in rats.
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[Changes in the blood content of cholesterol and lecithin in rats developing under conditions of hypoxia].
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Hypoxia-responsive lipid-poly-(hypoxic radiosensitized polyprodrug) nanoparticles for glioma chemo- and radiotherapy.
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Treatment of malignant glioma is a challenge facing cancer therapy. In addition to surgery, and chemotherapy, radiotherapy (RT) is one of the most effective modalities of glioma treatment. However, there are two crucial challenges for RT facing malignant glioma therapy: first, gliomas are known to
Protective effect of hypoxia on oxygen toxicity: possible mechanisms.
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Previous studies demonstrated a protective effect of hypoxia on subsequent death breathing oxygen. Four groups of rats were exposed to air for 120 hours plus 99% O2 for 52 hours (A + O2); 120 hours of hypoxia plus 52 hours 99% O2 (H + O2); 172 hours of only air (A); and 120 hours of only hypoxia
Lecithin-Bound Iodine Prevents Disruption of Tight Junctions of Retinal Pigment Epithelial Cells under Hypoxic Stress.
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Aim. We investigated whether lecithin-bound iodine (LBI) can protect the integrity of tight junctions of retinal pigment epithelial cells from hypoxia. Method. Cultured human retinal pigment epithelial (ARPE-19) cells were pretreated with LBI. To mimic hypoxic conditions, cells were incubated with
[Blood lipid changes in rats in hypoxia].
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Changes in the total lipid spectrum of serum of rats exposed to acute hypoxia were examined. Quantitative measurements of lipids showed a decrease of total lipids and a redistribution of lipid components in absolute and relative values. A distinct decrease in the quantity of cholesterol ester and a
Antistress and adaptogenic activity of lecithin supplementation.
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OBJECTIVE
Investigation of lecithin administration in rats for its antistress and adaptogenic activity.
METHODS
Lecithin was administered orally (1 mg/g body weight) to rats 0.5 hour, 1.5 hours, 3.0 hours, and 6.0 hours prior to cold (5 degrees C)-hypoxia (428 mm Hg)-restraint (C-H-R) exposure and
Minute ventilation during hypoxia is augmented with capsaicin supplementation in aged mice.
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Capsaicin is an agonist for transient receptor potential vanilloid 1 (TRPV1), and acute injection results in an increased frequency and tidal volume in young rats. It is unknown how capsaicin influences breathing in aged mice. We tested the hypothesis that capsaicin supplementation would elicit an
Intermittent normobaric hypoxia facilitates high altitude acclimatization by curtailing hypoxia-induced inflammation and dyslipidemia.
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Intermittent hypoxic training (IHT) is a discrete cost-effective method for improving athletic performance and high altitude acclimatization. Unfortunately, IHT protocols widely vary in terms of hypoxia severity, duration, and number of cycles affecting physiological outcomes. In the present study,
Intravenous nanosomes of quercetin improve brain function and hemodynamic instability after severe hypoxia in newborn piglets.
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Perinatal asphyxia is a major cause of death and neurological morbidity in newborns and oxidative stress is one of the critical mechanisms leading to permanent brain lesions in this pathology. In this context we have chosen quercetin, a natural antioxidant, known also by its brain protective effects
Biochemical factors in alcoholic liver disease.
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Three decades of research in ethanol metabolism have established that alcohol is hepatotoxic not only because of secondary malnutrition, but also through metabolic disturbances associated with the oxidation of ethanol. Some of these alterations are due to redox changes produced by the NADH generated
Fetal catecholamines.
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Experimental data from fetal human and animal research suggest that the fetal sympathoadrenal system, composed of the adrenal medulla, sympathetic neurons, and extra-adrenal chromaffin tissue functions from early fetal life to maintain fetal homeostasis. The extra-adrenal chromaffin tissue undergoes
Liposome concentration in canine ischemic myocardium and depolarized myocardial cells.
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To determine whether liposomes (microscopic phospholipid vesicles) may be useful in delivering drugs to a region of myocardial ischemia, we studied the concentration of positively charged and neutral liposomes containing 131I-albumin and horseradish peroxidase in ischemic myocardium of 20 dogs
Alveolar stability of altitude raised rats.
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On the lining of alveolar membrane of the lung presence of surfactant, a surface tension lowering agent which is a phospholipid in nature, is well established. A good correlation exists between pulmonary lecithin, the principle constituent of surfactant system and alveolar stability. The production
[Comparison of surface tension with determination of the L/S ratio in amniotic fluid for prediction of fetal lung maturity].
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In 83 specimen of amniotic fluid both a dynamic measurement of the surface tension by the Wilhelmy-balance and a determination of the lecithin-sphingomyelin-ratio were performed in 1987-1992 in order to predict a respiratory-distress-syndrome (RDS) of the newborn. 7 cases showed divergent results of
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