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Lo Presti Rosalia - - 2007
Oxidative stress has probably a role in coronary heart disease (CHD), but studies focused on the behaviour of oxidative status in patients with stable CHD have obtained controversial results. On the other hand, an increased release of leukocyte elastase is considered a marker of CHD. Exercise can induce oxidative stress ...
Blache Denis - - 2007
Oxidant stress and overproduction of reactive oxygen species (ROS) contribute to the development of cardiovascular disease. Oxidative modifications of low-density lipoproteins (LDL) are thought to play an early and critical role in atherogenesis. LDL oxidation can be reproduced in vitro, but results usually show a large interindividual variation not entirely ...
Choi Eun-Young - - 2007
This study investigated the effect of physical training and oxidative stress on the antioxidative activity and on plasma lipid profile. Forty eight rats were given either a physical training or no training for 4 weeks and were then subdivided into 3 groups: before-exercise (BE); during-exercise (DE); after-exercise (AE). The antioxidative ...
Cochón A C - - 2007
Paraquat is still a widely used herbicide in several countries. Its toxic action on plants occurs through a one-electron reduction interfering with the photosynthesis process. By a similar reaction, the herbicide may induce peroxidation processes in non-target animal species. Furthermore, paraquat may interfere with the cellular transport of polyamines. The ...
Gosselin Marie-Eve ME Department of Physics, Oakland University, Rochester, MI 48309, - - 2007
Our laboratory treats guinea pigs with hyperbaric oxygen (HBO) as a model for investigating the formation of nuclear cataract. Previous analyses of lens supernatants using this model have shown an increase in disulfide (-SS-) and loss of sulfhydryl (-SH) in the lens nucleus of O(2)-treated animals. In this paper, we ...
Mosleh Yahia Y - - 2007
Chitosan is a natural polymer which has the property to elicit the natural defenses mechanism in plant and which can be an interesting biopesticides. It is then necessary to investigate the potential toxicity of chitosan for aquatic animal health. Metallothioneins (MTs) are low molecular weight proteins, mainly implicated in metal ...
Wilhelm Filho Danilo - - 2007
Microchiropteran bats sustain very high oxygen consumption rates when active, but they also exhibit drastic daily drops in oxygen consumption when torpid. In addition, bats are also characterized by an extraordinary longevity considering their body mass and high specific metabolic rate when compared to other mammals of related size. Therefore, ...
Polkowska-Kowalczyk Lidia - - 2007
Three Solanum genotypes with various polygenic resistance levels to the oomycete pathogen Phytophthora infestans (Mont.) De Bary were studied for their antioxidant response to the pathogen culture filtrate (CF). Detached plant leaves were treated with CF for 6, 18 and 30 h, and assayed for changes in hydrogen peroxide content, ...
Sentürk Umit Kemal - - 2007
BACKGROUND/AIMS: Exercise-induced proteinuria is a common consequence of physical activity, although its mechanism is not clear. Oxidant stress has been proposed as one of different factors involved in postexercise proteinuria in rats. In this study we investigated whether reactive oxygen radicals generated during exercise play a role in exercise-induced proteinuria ...
Peake Jonathan M - - 2007
Interest in the relationship between inflammation and oxidative stress has increased dramatically in recent years, not only within the clinical setting but also in the fields of exercise biochemistry and immunology. Inflammation and oxidative stress share a common role in the etiology of a variety of chronic diseases. During exercise, ...
Peng Changlian - - 2006
In the leaf of rice (Oryza sativa L.) cultivar Yunnan purple rice, the anthocyanins with an obvious absorption peak at 530nm were distributed in the cells of upper and lower epidermis, bulliform tissue and bristle. The maximal photosynthetic oxygen evolution rate and chlorophyll content in flag leaves were 28% and ...
Muaz Belviranli, Hakki Gökbel
Generation of reactive oxygen species (ROS) is a normal process. Under physiological conditions, these deleterious species are mostly removed by the cellular antioxidant systems, which include antioxidant vitamins, protein and non-protein thiols, and antioxidant enzymes. An acute bout of exercise at sufficient intensity has been shown to stimulate activities of ...
Gago-Dominguez Manuela - - 2007
Physical exercise has been found to decrease the risk of breast cancer by undefined means. In our prior communication, we proposed lipid peroxidation to be a relevant mechanism for breast cancer protection associated with many established protective factors such as parity, oophorectomy, menopause, physical exercise, etc. [Gago-Dominguez M, Castelao J, ...
Richardson Russell S - - 2007
Originally thought of as simply damaging or toxic "accidents" of in vivo chemistry, free radicals are becoming increasingly recognized as redox signaling molecules implicit in cellular homeostasis. Indeed, at the vascular level, it is plausible that oxidative stress plays a regulatory role in normal vascular function. Using electron paramagnetic resonance ...
De Moffarts B - - 2007
The aim of this study was to investigate in a placebo-controlled field study the effect of a (n-3)-vitamin supplementation on erythrocyte membrane fluidity (EMF), oxidant/antioxidant markers and plasmatic omega3/omega6 fatty acid ratio (FAR) in 12 eventing horses. Venous blood was sampled at rest before (PRE) and after (POST) a three ...
Wierzba T H - - 2006
Exercise induces extensive generation of reactive oxygen species, which are responsible for tissue damage: enzymes inactivation, lipid peroxidation and single strand breaks in DNA. Defense system against free radicals is consisting of enzymes such as superoxide dismutase, catalase, glutathione peroxidase, and numerous non-enzymatic antioxidants. The study was performed to evaluate ...
Jamurtas Athanasios Z - - 2006
The effect of exercise on oxidative stress in glucose-6-phosphate dehydrogenase (G6PD)-deficient individuals was investigated. Nine G6PD-deficient males and nine males with normal G6PD activity were selected and requested to run at approximately 75% their maximum heart rate for 45 min. Blood samples were collected prior to and immediately after exercise. ...
Javier Ordonez Francisco - - 2007
OBJECTIVES: This study was designed to ascertain whether regular exercise may attenuate lipid peroxidation in adolescents with Down's syndrome. MATERIALS AND METHODS: Thirty-one male adolescents with Down's syndrome performed a 12-week training program, 3 days/week at a work intensity of 60-75% of peak heart rate (HRmax=194.5-[0.56 age]). Plasmatic malondialdehyde (MDA) ...
Yu Farong - - 2006
The present study examined the effects of derivatives of galactosides and glucosides in a polysaccharide extract from Euphorbia kansui (Euphorbiaceae) on exercise-induced oxidative stress in mice. Exhaustive swimming exercise significantly increases the degree of lipid peroxidation in terms of malondialdehyde content and reduces the antioxidant activities of superoxide dismutase (SOD) ...
Woolf Kathleen - - 2006
The B-vitamins (thiamin, riboflavin, vitamin B-6) are necessary in the energy-producing pathways of the body, while folate and vitamin B-12 are required for the synthesis of new cells, such as the red blood cells, and for the repair of damaged cells. Active individuals with poor or marginal nutritional status for ...
Xu Ling-jie - - 2006
To investigate the effects of deferiprone on doxorubicin-induced cardiotoxicity and determine its protection on cardiac contractility in vivo at tissue level. Spontaneously-beating isolated atria from rats were pretreated with deferiprone for 10 min at 1.2 mmol/L or 0.3 mmol/L, respectively before co-incubation with doxorubicin (DOX) at 0.03 mmol/L for 60 ...
Walter Patrick B PB Children's Hospital Oakland Research Institute, Oakland, CA 94609, - - 2006
Blood transfusion therapy is life-saving for patients with beta-thalassaemia and sickle cell disease (SCD), but often results in severe iron overload. This pilot study examined whether the biomarkers of tissue injury or inflammation differ in these two diseases. Plasma malondialdehyde (MDA) was significantly increased 1.8-fold in thalassaemia relative to control ...
Andrews, Anne
Exercise is known to increase reactive oxygen species, a condition recognized as oxidative stress. Obese individuals may experience even greater amounts of oxidative stress after exercise compared to normal weight people. It is not clear how weight loss affects exercise-induced oxidative stress in overweight subjects. The objectives of this study ...
Nimptsch Jorge - - 2007
The effect of increased ammonia content on sub-acute biochemical responses was assessed in the rooted submersed aquatic macrophyte Myriophyllum mattogrossense (common name: "Brazil Milfoil" or "Matogrosso Milfoil"), in a seven day aquarium experiment. The pH and temperature were monitored in order to determine the proportions of both ionized (NH4+) and ...
Marsh Susan A - - 2006
Erythrocytes transport oxygen to tissues and exercise-induced oxidative stress increases erythrocyte damage and turnover. Increased use of antioxidant supplements may alter protective erythrocyte antioxidant mechanisms during training. AIM OF STUDY: To examine the effects of antioxidant supplementation (alpha-lipoic acid and alpha-tocopherol) and/or endurance training on the antioxidant defenses of erythrocytes. ...
Gaeini A A - - 2006
AIM: The purpose of this study is to determine the effect following exercise to exhaustion of vitamin E supplementation on oxidative stress in athletic students. METHODS: Twenty male students voluntarily participated in the study and were randomly assigned (double blind) to either a vitamin E (daily dose of 450 mg ...
Lu Hsueh-Kuan - - 2006
The effects of spirulina supplementation on preventing skeletal muscle damage on untrained human beings were examined. Sixteen students volunteered to take Spirulina platensis in addition to their normal diet for 3-weeks. Blood samples were taken after finishing the Bruce incremental treadmill exercise before and after treatment. The results showed that ...
Chaufan Gabriela - - 2006
The aim of this work was to study the transference of hexachlorobenzene from a green alga (Chlorella kessleri) to an estuary crab (Chasmagnathus granulatus), and to analyze the toxic effects that the xenobiotic has on the latter. The effect of hexachlorobenzene uptake was evaluated measuring oxidative stress, Uroporphyrinogen decarboxylase activity ...
Acikgoz Osman - - 2006
Although regular physical exercise is beneficial to the body, it is well known that exhaustive exercise causes oxidative stress in muscle. Recent studies suggest that regular moderate physical exercise has the beneficial effects on brain. However, there is little information regarding whether or not exhaustive exercise could generate oxidative stress ...
Cases Nuria - - 2006
The response of lymphocyte and plasma antioxidant defences to a prolonged exercise as a cycling stage in a professional race was analysed. Antioxidant enzyme activities and gene expression, carbonyl derivative and MDA levels were determined in lymphocytes. Plasma levels of vitamin E, carotenes, protein carbonyl derivatives and the test d-Roms ...
Williams C A - - 2006
REASONS FOR PERFORMING STUDY: Vitamin E is the most commonly supplemented antioxidant in horses; however, previous research is not conclusive as to the recommended level for exercising horses. OBJECTIVE: To evaluate the effects of 3 levels of vitamin E supplementation on oxidative stress and vitamin/antioxidant status in intensely exercised horses ...
Traber Maret G - - 2006
During endurance exercise, oxygen consumption by the skeletal muscle can increase 100-200 times. We previously found that during an ultramarathon race (50 km, forest trail through hilly terrain) compared with a day of rest, vitamin E disappeared faster (as measured using 2H-labelled alpha-tocopherol) and lipid peroxidation increased. Therefore, we hypothesized ...
Nikolaidis Michalis G - - 2006
PURPOSE: This study was designed to investigate whether individuals with glucose-6-phosphate dehydrogenase (G6PD) deficiency can exercise without greater perturbations in their redox status compared with non-G6PD-deficient individuals. METHODS: Nine males with established G6PD deficiency and nine males with normal G6PD activity performed two exhaustive treadmill exercise protocols of different duration ...
Gomez-Cabrera Mari-Carmen - - 2006
We have recently reported that xanthine oxidase is involved in the generation of free radicals in exhaustive exercise. Allopurinol, an inhibitor of xanthine oxidase, prevents it. The aim of the present work was to elucidate the role of exercise-derived reactive oxygen species in the cell signalling pathways involved in the ...
de Moffarts B - - 2006
REASONS FOR PERFORMING STUDY: Interest in establishing oxidant/ antioxidant profiles in competition horses is increasing. Earlier studies performed in horses have mainly been performed under laboratory conditions using a treadmill and it is not known to what extent laboratory results of oxidant/antioxidant studies might be transposed to field conditions. OBJECTIVE: ...
Ordoñez F J FJ School of Sport Medicine, University of Cadiz, San Fernando (Cadiz), - - 2006
Superoxide dismutase (SOD) overexpression in people with Down's syndrome negatively modifies the equilibrium SOD/glutathione peroxidase+catalase, which may ultimately lead to an increased hydroxyl radical formation. To assess the influence of regular exercise on erythrocyte SOD activity to determine the ability of exercise to attenuate increased oxidative damage. Thirty one male ...
Lawler John M - - 2006
Oxidative stress is associated with muscle fatigue and weakness in skeletal muscle of ischemic heart disease patients. Recently, it was found that endurance training elevates protective heat shock proteins (HSPs) and antioxidant enzymes in skeletal muscle in healthy subjects and antioxidant enzymes in heart failure patients. However, it is unknown ...
Nwanjo, HU; ;
The effects of ingesting antioxidant vitamins E and C for 4 weeks on serum malondialdehyde (MDA) levels at rest and after exercise was studied in humans. Twenty-four young healthy males aged 15 – 30 years participated in the study. They were randomly assigned to either an antioxidant vitamin supplemented group ...
Schulpis Kleopatra H - - 2006
BACKGROUND: L-cysteine (L-cys) is implicated in the reduction of free radical production. AIM: To investigate the effect of training and L-cys supplementation on the erythrocyte glucose-6-phosphate dehydrogenase (G6PD) activity. METHODS: Blood was obtained from 10 basketball players pre-game (group A), post-game (group B) and after 1 week on L-cys (0.5 ...
Girotti Stefano - - 2006
The total antioxidant capacity (TAC) of five different wines (four red and one white) was determined in five different steps of winemaking carried out in a commercial wine cellar by a chemiluminescence (CL) assay. The CL method is suitable to determine the antioxidant capacity of beverages, and preliminary trials showed ...
Vollaard Niels B J - - 2006
Tapering can be an effective way of enhancing performance after a period of intensive training, but the mechanisms for this ergogenic effect are unclear. It was hypothesized that overload training will increase oxidative stress through an accumulative effect of repeated high-intensity exercise, whereas tapering will improve the antioxidant defense system ...
Aksoy Y - - 2006
Male rats were equally divided into trained rest (TR), trained exhaustive exercise (TE), untrained rest (UR), and untrained exhaustive exercise (UE). Endurance training consisted of treadmill running for 1.5 h/d, 5 days a week for 8 weeks reaching the speed of 2.1 km/h at the fortieth week. For acute exhaustive ...
Guazzi Marco - - 2006
Exercising muscle hypoperfusion stimulates afferents (metaboreceptors) involved in the regulation of ventilation. Atrial fibrillation (AF), particularly when combined with diseases causing endothelial (ED) impairment, such as hypertension (HP) and diabetes mellitus (DM), depresses the ED activity and enhances exercise hyperventilation. The relationship between these two functions and the underlying mechanisms ...
Pialoux V - - 2006
OBJECTIVE: The aim was to investigate the effects of acute exercise under hypoxic condition and the repetition of such exercise in a 'living low-training high' training on the antioxidant/prooxidant balance. DESIGN: Randomized, repeated measures design. SETTING: Faculté de Médecine, Clermont-Ferrand, France. SUBJECTS: Fourteen runners were randomly divided into two groups. ...
Bloomer Richard J - - 2006
PURPOSE: To compare the effects of two antioxidant formulas on biomarkers of oxidative stress before and after aerobic exercise. METHODS: Aerobically trained men (N=25) and women (N=23) were assigned to one of three treatments: 400 IU of vitamin E+1 g of vitamin C (V; N=15), a fruit and vegetable juice ...
Zembron-Lacny A - - 2006
AIM: The purpose of this research was to explain whether a single dose of vitamin E influences on disturbances of pro-oxidant-antioxidant equilibrium induced a laboratory 2,000 m rowing test. METHODS: The athletes were divided into two groups: vitamin E (1.000 mg alfa-tocopherol acetate) and P (placebo: cod-liver oil) supplemented 3 ...
Antunes-Neto J M F - - 2006
A novel method to measure oxidative stress resulting from exhaustive exercise in rats is presented. In this new procedure we evaluated the erythrocyte antioxidant enzymes, catalase (CAT) and glutathione reductase (GR), the plasma oxidative attack markers, reactive carbonyl derivatives (RCD) and thiobarbituric reactive substances (TBARS). Muscular tissue damage was evaluated ...
Pittaluga Monica - - 2006
To better clarify the relationship between physical activity and oxidative stress, we determined the effects of a maximal test in 18 young subjects with different training levels (six professional Athletes and 12 non-agonists (NA)). Redox homeostasis (total antioxidant activity (TAS), vitamin C and glutathione (GSH)), oxidative damage (diene conjugation and ...
Walker Thomas B - - 2006
Rhodiola rosea is an herb purported to possess adaptogenic and ergogenic properties and has recently been the subject of increased interest The purpose of this article was to review and summarize recent investigations of the potential performance-enhancing properties of Rhodiola rosea. Such studies have generated equivocal results. Several investigations conducted ...
Atalay Mustafa - - 2006
Physical exercise induces oxidative stress and tissue damage. Although a basal level of reactive oxygen species (ROS) is required to drive redox signaling and numerous physiologic processes, excess ROS during exercise may have adverse implications on health and performance. Antioxidant nutrients may be helpful in that regard. Caution should be ...
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