Search Results
Results 601 - 650 of 1377
< 8 9 10 11 12 13 14 15 16 17 18 >
Pushpalatha K - - 2007
The interaction of exercise training and ethanol on the myocardial antioxidant enzymes and the oxidative stress markers was investigated in the Wistar strain male albino rats. We also tested the interactive effects of exercise training and ethanol on the age-associated free radical production and antioxidant defense system. We found a ...
Steinberg Jean Guillaume - - 2007
INTRODUCTION: The simultaneous determination of the time course and magnitude of oxidative stress indicators and cytokine changes elicited by maximal incremental exercise has not yet been published for healthy sedentary subjects. PURPOSE: The determination of normal exercise-induced changes in oxidant-antioxidant status and plasma cytokine represents a fundamental step before exploring ...
Wilund Kenneth R - - 2007
Engaging in regular physical activity reduces the risk of developing CVD (cardiovascular disease), but it is not certain to what degree this may be due to the anti-inflammatory effects of exercise. Following acute exercise, there is a transient increase in circulating levels of anti-inflammatory cytokines, whereas chronic exercise reduces basal ...
Gochman Einat - - 2007
BACKGROUND: Exhaustive exercise is associated with increased metabolic rate and accelerated generation of reactive oxygen species. Cigarette smoke also contains oxidants that may participate in the development of atherosclerosis. However, data on the association between exercise and smoking are sparse. METHODS: A homogenous group of 30 young men (15 smokers ...
Mendes Fúlvio Rieli - - 2007
Baccharis trimera (Asteraceae) and Davilla rugosa (Dilleniaceae) are used popularly as tonics, aphrodisiacs and for stomach ailments, among other uses. Hydroalcohol extracts of the aerial parts of both plants were investigated with regard to their chemical constitution and their pharmacological activity in tests that evaluate adaptogen activity. Alkaloids, flavonoids, saponins, ...
Bouazizi Houda - - 2007
The effect of copper excess on growth, H2O2 level and peroxidase activities were studied in maize shoots. Ten-day-old seedlings were cultured in nutrient solution that contained Cu2+ ions at various concentrations (50 and 100 microM) for seven days. High concentrations of Cu2+ ions caused significant decrease both in matter production ...
Magalhães José - - 2007
PURPOSE: Indoor climbing is a worldwide sport with particular physiological and physical demands. The purpose of this study was to analyze the effect of sustained indoor climbing until exhaustion on plasma oxidative stress markers, and to relate it to whole-body dynamic exercise performed at the same percentage of maximal oxygen ...
Liu Yunguo - - 2007
Bechmeria nivea (L.) Gaud. (ramie) seedlings subjected to a series of cadmium (Cd) concentrations (0, 1, 3 and 7 mg l(-1)) over a 10d period were investigated with regard to the uptake and distribution of Cd, its effect on membrane lipid and chlorophyll synthesis, and response of the ascorbate-glutathione cycle ...
Margonis Konstantinos - - 2007
Overtraining syndrome is characterized by declining performance and transient inflammation following periods of severe training with major health implications for the athletes. Currently, there is no single diagnostic marker for overtraining. The present investigation examined the responses of oxidative stress biomarkers to a resistance training protocol of progressively increased and ...
Brownlee Iain A - - 2007
Reactive oxygen species (ROS) have been implicated in the pathogenesis of many colonic diseases. Mucus is the colon's first line of defence against luminal agents. This study has therefore characterised ROS action on colonic mucus secretions. ROS were produced using peroxide-based systems of different concentrations. The effects of these systems ...
Ruuhola Teija - - 2007
Plants have been suggested to have an immunological memory comparable to animals. The evidence for this, however, is scarce. In our study with the mountain birch -- Epirrita autumnata system, we demonstrated that birches exposed as long as 5 yr to feeding of E. autumnata larvae (delayed induced resistance, DIR), ...
Thomas C - - 2007
The present study was designed to investigate whether a protein hydrolysate enriched in branched chain amino acids and antioxidants, trace and mineral elements, and vitamins would affect performance and fatigue. Eighteen sportsmen underwent testing before and after 28 days supplementation with either treatment in protein hydrolysate or placebo. Testing included ...
Lekhi Chhavi - - 2007
The influence of exercise on free-radical chemistry is not well understood. It is yet to be confirmed whether an adequate biochemical defence system exists in the human body to provide protection from oxy-centred radicals generated by exercise. Fifty trained elite cyclists undertaking exhaustive endurance training were compared with a control ...
Maleki N - - 2007
The electrochemistry of L-cysteine (CySH) in neutral aqueous media was investigated using carbon ionic liquid electrode (CILE). Comparative experiments were carried out using glassy carbon electrodes. At CILE, highly reproducible and well-defined cyclic voltammograms were obtained for l-cysteine with a peak potential of 0.49V vs Ag/AgCl, showing that CILE manifests ...
Bachur José Alexandre - - 2007
The objective of this study was to analyze the oxidative stress of skeletal muscle of sedentary rats at the morphological and biochemical level, due to acute physical effort performed at different intensities and during different periods of time. Forty-two male sedentary Wistar rats were divided into two groups, group A ...
Nikolaidis Michalis G - - 2007
This study investigated the effect of an acute swimming protocol on selected blood redox status indices in trained children. Eleven boys and 11 girls (aged 9-11 y) swam 12 bouts of 50 m at a pace corresponding to 70%-75% of the participant's 50 m maximum velocity, with each bout separated ...
Davison Glen - - 2007
PURPOSE: Antioxidant supplementation may modulate systemic cortisol and interleukin-6 (IL-6) responses to prolonged exercise, but it is unclear whether such effects are also associated with a reduction in the magnitude of immunodepression. The purpose of the present study was to examine the effects of daily vitamin C (L-ascorbic acid, 1000 ...
Yilmaz Necat - - 2007
Physical training is known to increase the antioxidant defence system and reduce exercise-induced oxidative stress. However, intense physical aerobic and anaerobic training with competition, such as those imposed on young professional basketball players can induce an increase of oxidative stress, which can be implicated with overtraining. The aim of this ...
Delliaux S - - 2007
Data on effects of statins on resting oxidant-antioxidant status are contradictory and no study has been published on the effects of statins on exercise-induced oxidative stress. We carried out a 6-month longitudinal study in 10 dyslipidemic patients receiving 10 mg/day atorvastatin and 13 healthy sedentary subjects. Thiobarbituric acid reactive substances ...
Yu Yang - - 2007
We previously reported that reactive oxygen species (ROS) in paraventricular nucleus (PVN) mediated cardiac sympathetic afferent reflex (CSAR). The present study investigated the role of endogenous hydrogen peroxide (H(2)O(2)), a ROS, in the PVN in mediating the CSAR and regulating sympathetic activity. The CSAR was evaluated by the response of ...
Irato Paola - - 2007
The aim of the present work was to determine the activities of selected antioxidant enzymes (SOD, Se-GPX, CAT) in two species of bivalves, Scapharca inaequivalvis and Tapes philippinarum, from two sites of the lagoon of Venice that are characterized by different pO(2) (Marghera and Chioggia). The specimens were collected at ...
Augustyniak M - - 2007
Berkheya coddii Roessler (Asteraceae) is a hyper-accumulator of nickel, which can be used in phytomining and phytoremediation. Chrysolina pardalina Fabricius (Chrysomelidae) is a phytophagous leaf beetle, which may be useful in controlling population levels of B. coddii after it has been introduced into a new habitat. The aim of this ...
Bémeur Chantal - - 2007
In this review, we summarize the role of hyperglycemia during cerebral ischemia. Hyperglycemia occurring during experimental and clinical stroke has been associated with increased cerebral damage. Increased oxidative stress resulting from hyperglycemia is believed to contribute to the exacerbated damage. More specifically, superoxide, nitric oxide and peroxynitrite are believed to ...
Hellsten Ylva - - 2007
The effects of acute exercise on the mRNA content of selected genes were examined during control conditions and after oral intake of antioxidants. In addition, to provide evidence for formation of reactive oxygen species (ROS) in human skeletal muscle during exercise, cytochrome c reduction was measured in microdialysate from the ...
Ji Li Li - - 2008
Contraction-induced production of reactive oxygen species has been shown to cause oxidative stress to skeletal muscle. As an adaptive response, muscle antioxidant defense systems are upregulated in response to exercise. Nuclear factor kappaB and mitogen-activated protein kinase are two major oxidative-stress-sensitive signal transduction pathways that have been shown to activate ...
Judge Sharon - - 2007
Mitochondria have been a central focus of several theories of aging as a result of their critical role in bioenergetics, oxidant production, and regulation of cell death. A decline in cardiac mitochondrial function coupled with the accumulation of oxidative damage to macromolecules may be causal to the decline in cardiac ...
Zoppi C C - - 2008
Overreaching (OVR) is defined as the initial phase of overtraining syndrome and is known as a metabolic imbalance leading to short-term fatigue. Exercise increases reactive oxygen species production, which can oxidize intracellular structures impairing cell function and thus leads to OVR process. The aim of this work is to study ...
Venditti P - - 2007
Previous study showed that exercise induces higher oxidative damage and respiratory capacity reduction in hyperthyroid than in euthyroid skeletal muscle. Because impaired cell function can result from mitochondrial dysfunction, we evaluated the changes induced by exercise in oxygen consumption of skeletal muscle mitochondria from euthyroid and hyperthyroid rats. The mitochondrial ...
Ferrer M D - - 2007
The aim was to study the effects of a scuba diving session on the lymphocyte antioxidant system, NO synthesis, the capability to produce reactive oxygen species and the antioxidant response in neutrophils. For that purpose seven male divers performed an immersion at a depth of 40 m for 25 min. ...
Aydin Cenk - - 2007
In this study, we evaluated the hypothesis that long term dietary restriction would have beneficial effects on the oxidative stress and antioxidant enzyme systems in liver, heart and kidney in adult male rats undergoing different intensities of swimming exercise. Sixty male, Sprague-Dawley rats were assigned as either dietary restricted on ...
Gougoura Sofia - - 2007
The blood redox status of child athletes is compared with that of age-matched untrained individuals. In the present study, 17 swimmers (10.1 +/- 1.6 years) and 12 non-athletes (9.9 +/- 1.1 years) participated. Reduced glutathione (GSH) was lower by 37% in swimmers compared to non-athletes (P < 0.01), oxidized glutathione ...
Gomez-Cabrera Mari-Carmen - - 2008
Exercise causes oxidative stress only when exhaustive. Strenuous exercise causes oxidation of glutathione, release of cytosolic enzymes, and other signs of cell damage. However, there is increasing evidence that reactive oxygen species (ROS) not only are toxic but also play an important role in cell signaling and in the regulation ...
Bailey Damian M - - 2007
The present study determined if acute exercise increased free radical formation in human skeletal muscle. Vastus lateralis biopsies were obtained in a randomized balanced order from six males at rest and following single-leg knee extensor exercise performed for 2 min at 50% of maximal work rate (WR(MAX)) and 3 min ...
Knez Wade L - - 2007
INTRODUCTION: Ultraendurance athletes who maintain a very high volume of exercise may, as a result of greater production of reactive oxygen species (ROS), be particularly susceptible to oxidative damage. PURPOSE: This study sought to examine and compare pre- and postrace markers of oxidative stress in ultraendurance athletes training for, and ...
Radak Zsolt - - 2008
Exercise is associated with increased ATP need and an enhanced aerobic and/or anaerobic metabolism, which results in an increased formation of reactive oxygen species (ROS). Regular exercise seems to decrease the incidence of a wide range of ROS-associated diseases, including heart disease, type II diabetes, rheumatic arthritis, Alzheimer and Parkinson ...
Yin Ying - - 2007
In the present study, the bioaccumulation and reactive oxygen species (ROS) generation were studied after fish (Carassius auratus) were exposed to different concentrations (0.01, 0.02, 0.05, 0.07 and 0.1 mg/L) of phenanthrene for 4 days. The accumulation of phenanthrene in liver increased with the exposure concentration (R(2)=0.88). A secondary spin ...
Cheng Jason Y - - 2007
Recently it has been shown that long chain (C5-C8) n-alkyl glucopyranosides completely inhibit ultrasound-induced cytolysis [J.Z. Sostaric, N. Miyoshi, P. Riesz, W.G. DeGraff, and J.B. Mitchell, Free Radical Biol. Med., 39 (2005) 1539]. This protective effect has possible applications in HIFU (high intensity focused ultrasound) for tumor treatment, and in ...
Zhao Ming - - 2007
As reported in our previous paper [Y. Wu, L. Bi, W. Bi, Z. Li, M. Zhao, C. Wang, J. Ju, S. Peng, Bioorg. Med. Chem. 14 (2006) 5711-5720.], a series of novel 2-substituted nitronyl nitroxides were synthesized and characterized to show enhanced free radical scavenger properties. Here, the logP values ...
Spasojević Ivan I Department of Medicine, Duke University Medical Center, Durham, NC 27710, USA. - - 2007
The Mn(III) meso-tetrakis(N-ethylpyridinium-2-yl)porphyrin, MnIIITE-2-PyP5+ (AEOL-10113) has proven effective in treating oxidative stress-induced conditions including cancer, radiation damage, diabetes, and central nervous system trauma. The ortho cationic pyridyl nitrogens of MnTE-2-PyP5+ are essential for its high antioxidant potency. The exceptional ability of MnIIITE-2-PyP5+ to dismute O2.- parallels its ability to reduce ...
Lüchmann Karim H - - 2007
Contaminant input into the environment can affect the biochemical responses of exposed organisms. Activity of conjugation enzymes, such as glutathione S-transferase (GST) has been proposed as a biomarker of susceptibility to the presence of potentially damaging xenobiotics. The aim of the present study was to evaluate the activity of total ...
Brock K - - 2007
Vitamin D deficiency may be associated with osteoporosis and fractures in the elderly. In Australia where there is a sizeable Vietnamese population, research has not yet clarified the roles of diet, exercise and sun exposure in determining vitamin D status. Plasma samples for 25-hydroxy-vitamin D (25(OH)D); dietary intake of vitamin ...
Nakamoto Hideko - - 2007
Exercise is often said to increase the generation of reactive oxygen species that are potentially harmful. On the other hand, regular exercise has various health benefits even late in life. The specific aim of this study was to explore effects of regular exercise on oxidative status of DNA in aged ...
Ho, Chao-Chung
Purpose To evaluate the effects of antioxidant on cardiovascular performance, exercise capacity and health status in chronic heart failure patients. Methods This was a cross-over, randomized controlled trial. A total of 37 subjects were allocated to two groups randomly. Group I (n = 19) received vitamin C 4000 mg daily ...
Gulvady Chaitanya
The present cross-sectional and interventional study was carried out to assess the incidence of vitamin B12 / vitamin D deficiency in male office executives in the tropical city of Mumbai, India. A total of 75 senior executives were surveyed and subjected to analysis of blood levels of vitamin D (25 ...
Oh Hea Young - - 2007
Menopause is often accompanied with weight gain, metabolic lipid abnormalities, and oxidative stress. In this study, we investigated the combined effects of exercise and soy isoflavone supplementation on the lipid profiles and antioxidant capacities of ovariectomized rats. Twenty-five female Sprague-Dawley rats were divided into 5 groups: sham-operated, ovariectomized (OVX), OVX ...
Jäger Ralf - - 2007
Phospholipids are essential components of all biological membranes. Phosphatidylcholine (PC) and Phosphatidylserine (PS) are Phosphatidyl-phospholipids that are required for normal cellular structure and function. The participation in physical activity often challenges a variety of physiological systems; consequently, the ability to maintain normal cellular function during activity can determine sporting performance. ...
Bloomer Richard J - - 2007
Both acute bouts of prior exercise (preconditioning) and antioxidant nutrients have been used in an attempt to attenuate muscle injury or oxidative stress in response to resistance exercise. However, most studies have focused on untrained participants rather than on athletes. The purpose of this work was to determine the independent ...
Parthimos Theodore - - 2007
BACKGROUND: L-Cysteine (L-Cys) is implicated in the reduction of free radical production. The aim of this study was to investigate whether L-Cys supplementation prevents modulation of the activities of erythrocyte membrane acetylcholinesterase (AChE), Na(+),K(+)-ATPase and Mg(2+)-ATPase induced by free radicals in basketball players during training. METHODS: Blood was obtained from ...
Kon Michihiro - - 2007
AIM: We aimed to examine the effect of Coenzyme Q10 (CoQ10) supplementation on the exhaustive exercise-induced injury and oxidative stress in skeletal muscle and liver. METHODS: Rats were divided into four groups: rest group [control (Con)-Rest; n = 6)], exercise group (Con-Ex; n = 6), rest group with CoQ10 supplement ...
Ikino Cláudio Márcio Yudi - - 2007
HYPOTHESIS: Nitric oxide (NO) is likely to be synthesized by nitric oxide synthase Type II (NOS II) action and may partake in the origin of changes of compound action potential (CAP) threshold observed in guinea pigs with induced endolymphatic hydrops. This study aimed to assess the action of a NOS ...
< 8 9 10 11 12 13 14 15 16 17 18 >