View clinical trials related to Oxidative Stress.
Filter by:Taekwondo players undergo rapid reductions of body weight prior to their competition in order to gain a size advantage over the opponent. However, these large weight changes with concomitant high intensity exercise training induce poor lipid profiles and high levels of oxidative stress, which can be detrimental to health and sports performance. Therefore, the purpose of this study was to investigate the ability of the nutritional supplement octacosanol to combat the physiological detriments that can occur from these rapid weight changes paired with high intensity exercise training.
This study determines the effect of olive oil and bran oil on antioxidant levels, and glycemic control in patients with type 2 diabetes mellitus (DM) Intervention: Patient type 2 DM will receive olive oil and bran oil with cross over study
Recent evidence suggests that there is a directly proportional relationship between diets with a high concentration of antioxidants and the reduction of blood pressure and the risk of cardiovascular events. However, there is a gap with regard to research on the effects of these diets on vascular function, especially in humans. The aim of this study was to evaluate the effect of antioxidant supplementation through the consumption of blueberry, cranberry and pomegranate extract capsules (1 of each per day), the effect of the autonomic balance in hypertensive and normotensive adults.
The research aims to determine the impact of 30-day supplementation of melatonin on the antioxidative defense mechanisms and the release of markers of oxidative stress and inflammation in rowers and footballers undergoing training of submaximal intensity.
This study aims to evaluate whether a short-term intervention strategy using air cleaner reduces indoor exposure to airborne particles (particulate matter with an aerodynamic diameter ≤2.5μm, PM2.5) and phthalates and improves cardiopulmonary health among Chinese healthy adults based on a randomized double-blinded crossover trial.
The research aims to determine the parameters of oxidative stress and inflammatory processes and compare these parameters with the image obtained using positron emission tomography (PET) with 2-deoxy-2-[fluorine-18]fluoro- D-glucose (18F-FDG) integrated with computed tomography (CT) in the group of oncological patients.
The purpose of this study is to determine the effect of different dietary zinc intakes on fatty acid metabolism and other zinc biomarkers
In a cross-over study the investigators evaluate the effects of natural (Panmol-B-Complex) (Pan [Greek] = all; moles [Latin] = molecules/particles - brand name) versus synthetic vitamin B complexes to identify the bioavailability of distinct vitamins as well as long-term effects. The primary hypothesis for this study: "Natural Vitamin B-complexes are as effective as synthetic Vitamin B-complexes or better." For this reason 30 subjects (18 to 65y; BMI >19 to <29) were recruited for this study. The study population was divided into 2 groups of each 15 subjects in a cross-over trial. Vitamin supplementation consisted of Thiamine (2.93 mg), Riboflavin (3.98 mg), Niacin (29.85 mg), Pantothenic acid (10.95 mg), Pyridoxine (3.38 mg), Biotin (0.108 mg), Folic acid (0.69 mg) and Cobalamin (8.85 µg) per day in both groups. Blood samples are taken at baseline - 1.5h after vitamin supplementation - 4h - 7h - 6 weeks - wash out phase I (2 weeks); start cross-over: baseline - 1.5h after vitamin supplementation - 4h - 7h - 6 weeks - washout phase II (6 weeks). In case of main target criteria Thiamin, Riboflavin, Pyridoxine, Folic acid and Cobalamin were measured in serum as well as total peroxides (µmol/L), peroxidase-activity (U/L), total antioxidant status (mmol/L) and polyphenols (mmol/L).
Cardiovascular disease is the leading cause of mortality worldwide. Endothelial dysfunction (ED) is the main mechanism which leads to atherosclerosis, where the balance between pro and antioxidant factors results in a decreased nitric oxide (NO) bioavailability. Xanthine OxidoReductase (XOR) is one of the main generators of reactive oxygen species (ROS). Uric acid (UA), a major antioxidant in human plasma and end product of purine metabolism, is associated with cardiovascular diseases since many years; however the precise mechanisms which relate UA to ED are still not well understood. The purpose of this study is to unravel the XOR and UA pathways involved in ED. Three groups of participants (young (< 40 y) male healthy participants [1] ; male and female helthy participants (40 to 65 y) [2] and patients with primary hypertension [3]) will be exposed to febuxostat (a strong and selective XOR inhibitor), or recombinant uricase (which oxidizes UA into allantoin) to vary UA levels and concomitantly control for confounding changes in XOR activity. Oxidative stress will be estimated by several markers. Endothelial function will be assessed by a laser Doppler imager in the presence of hyperthermia and endothelium stimulators. This study is specifically designed to untie the respective effects of UA and XOR pathways on oxidative stress and endothelial function in humans. The investigators will test the following hypothesis: 1. An extremely low level of uric acid after uricase administration induces endothelial dysfunction and oxydative stress, 2. A specific XO inhibitor limits unfavourable effects of the serum UA reduction elicited by uricase administration, 3. Endothelial function and oxydative stress are further improved with febuxostat as compared to placebo, 4. All these observations are more marked in hypertensives then in older participants than in young healthy subjects.
Low oxygen at altitude causes pauses in breathing during sleep, called central sleep apnea. Central sleep apnea causes repeated awakenings and poor sleep. Low oxygen itself and the induced oxidative stress can damage mental function which is likely worsened by poor sleep. Reduced mental function due to low oxygen can pose a serious danger to mountain climbers. However there is also mounting evidence that even in populations of people that live at high altitudes and are considered adapted, low oxygen contributes to reductions in learning and memory. Therefore there is a serious need for treatments which may improve sleep, control of breathing and mental function during low oxygen. Melatonin is a hormone produced in the brain during the night which regulates sleep patterns with strong antioxidant and anti-inflammatory properties. A study previously reported that melatonin taken 90 mins before bed at 4,300 m (14,200 ft) induced sleep earlier, reduced awakenings and improved mental performance the following day. However how melatonin caused these effects was not determined. Therefore this study aims to determine how melatonin effects control of breathing, sleep and mental performance during exposure to low oxygen.