View clinical trials related to Oxidative Stress.
Filter by:Exposure to hypobaric hypoxia demands maximum effort of the body and can lead to high altitude illnesses. Recently, there is rising interest on coagulation activation during trekking and mountaineering in higher regions and on development of oxidative stress due to hypoxia. 30 volunteers have been examined during an high altitude research expedition to the 7134m high mount Pik Lenin in Kyrgyzstan to investigate mechanisms of coagulation activation and effects of antioxidant supplements on oxidative stress.
The aim of this study is to assess the effect of ingesting a commercial carbohydrate and protein dietary supplement in powder form (P-CHO supplement) or a milk shake with skimmed milk, strawberries and banana (MS), after resistance exercise, in muscle damage, oxidative stress, inflammation and functional recovery. It is hypothesised if the ingestion of a milk shake with skimmed milk and fruit (strawberry and banana) has the same impact on markers of muscle damage, oxidative stress, inflammation and functional recovery induced by resistance exercise, as the intake of a commercial powder with the same CHO and protein amounts. Fifteen adult athletes from the Portuguese Athletic Federation will complete 2 trials separated at least by 2 weeks. Alternate legs and drinks will be used in each trial and participants will be overnight-fasted. This study will have a single-blind, randomized, crossover, repeated-measures experimental design. In each trial, after warm-up, the eccentric peak torque of the knee joint extensors will be determined using an isokinetic dynamometer. After this, participants will complete an isokinetic exercise until exhaustion at a constant angular velocity of 60° • s-1. After the exhaustion protocol, athletes will perform again the peak torque determination. Immediately after, participants will drink the P-CHO supplement or MS during the first 2 h. Both drinks will contain 0.8-1.2 g carbohydrates • kg-1 • h-1 and 0.2-0.4 g protein • kg-1 • h-1. Twenty four and 48 h after the exhaustion protocol participants will return to the laboratory to repeat the peak torque determination. Blood samples will be collected before warming-up, immediately and 2 h after the last peak torque determination and 24 h and 48 h after. Serum samples will be analyzed for creatine kinase, lactate dehydrogenase, interleukine-6, protein carbonyls and total antioxidant status. The delayed onset muscle soreness, using a visual analogue scale, and girths will be measured at the same moments as blood sampling. Two-way repeated-measures ANOVA will be used for statistical analysis of the data.
The purpose of this project is to determine whether chokeberry polyphenols mitigate cardiovascular disease risk in former smokers.
Since diabetes has multiple etiologies and oxidative stress one of the proposed mechanisms, the objective is to determine the effect of supplementation with β-carotene to type 2 diabetics and healthy individuals, on iron metabolism, oxidative balance, and antioxidant plasma capacity, using doses similar to the daily nutritional requirement.
The investigators investigate the impact of an encapsulated fruit, berry and vegetable juice powder concentrate on oxidative stress, inflammation and blood flow before and post exercise in overweight, middle-aged, women. Main hypotheses (H1): - The nutraceutical has an impact on oxidative stress reduction. - The nutraceutical has an impact on inflammation. - The nutraceutical has an impact on blood flow and microcirculation. - Walking exercise for 30 minutes has an impact on oxidative stress- and inflammation markers. - Walking exercise for 30 minutes has an impact on blood flow and microcirculation - The combination of nutraceutical supplementation + walking exercise for 30 minutes has an impact on oxidative stress- and inflammation markers, and on blood flow/microcirculation.
We investigate the impact of a probiotic-based dietary supplement on oxidative stress and endotoxemia before and after strenuous exercise. Hypotheses (H1): - Supplementation has an influence on oxidative stress parameters before and post exercise - Supplementation has an influence on parameters of endotoxemia and inflammation before and post exercise - Strenuous exercise has an influence on parameters of oxidative stress, inflammation and endotoxemia
Oxidative stress is seen in children with asthma, but is hard to measure. The investigators exploring the utility of using a commercially available assay to measure oxidative stress in the urine in asthmatics. Additionally, the investigators will attempt to prove that oxidative stress is higher in children with acute asthma compared to those with stable asthma and that this stress is also higher in children with more severe clinical asthma exacerbations compared to less severe ones.
Study of Oxidative stress Markers (F2 Isoprostanes for lipid peroxidation, Carbonyl groups for protein peroxidation, 3 Nitrotyrosine for damage by nitrogens, and 8-Hydroxyguanosine for RNA peroxidation)in patients with colorectal cancer undergo surgical treatment (preoperatively during the intervention and postoperatively) and controls.
The trial investigates changes in metabolism during high altitude expedition up to 6865m. A mass-spectrometry based platform is used to detect different oxidative stress related metabolites. Symptoms of acute mountain sickness are evaluated and correlated with laboratory parameters.
Soymilk components such as isoflavones, essential fatty acids, phytoesterols, good fats, inositols might have beneficial effects on controlling complication among diabetic nephropathy patients(DN).Most studies in this regard have been examined the effect of soy consumption on cardiorenal risk factors among patients with DN and there are few data about relationship of soy milk consumption and health effect in patients with DN . Therefore, we evaluated the effects of soy milk compared to cow's milk on blood pressure, inflammation, oxidative stress and fibrinolytic markers and cardiorenal risk factors among these patients. This was a cross-over randomized clinical trial which was conducted in Isfahan among diabetic nephropathy patients. Patients were randomly assigned to consume a diet containing cow's milk or a diet in which only one glass of soy milk was substituted; each one for 4 weeks.