View clinical trials related to Oxidative Stress.
Filter by:Solarplast is a unique mixture of antioxidant enzymes and single antioxidant molecules that are capable of attack oxidants that cause damage to the cells in the human body and cause premature aging. This mechanism may provide protection from stress, such as free radicals, heat, infection, as well as reduce inflammation and participate in the repair mechanism of the intestinal tract. Participants will consume Solarplast, or placebo, for 45 days with blood draws at day-0 and -45 in order to assess antioxidant capacity.
This study will examine the effects of Oceanix™, an antioxidant supplement, on muscle performance, immune and endocrine function, recovery and safety in participants undergoing resistance training. Measures of muscle performance will include isometric testing in the bench-press and mid-thigh pull and ground reaction forces in the counter movement- and squat-jump. Markers of immune function will include salivary immunoglobulin A (IgA) as well as serum total antioxidant capacity (TAC) and superoxide dismutase (SOD) while endocrine function will be measured by salivary cortisol and testosterone. Recovery will be measure by plasma creatine kinase (CK) and perceptual measures will be assessed using a validated perceived recovery status (PRS) scale. Safety metrics will be indicated by a comprehensive metabolic panel (CMP), complete blood count (CBC), and urinalysis (UA). Additionally, the modified Borg Rating of Perceived Exertion (RPE) will be administered following each training session to grade physical exertion and monitor progression of the training protocol.
The present study aims to support previous research on the effects of antioxidant therapy on the outcome of diabetic retinopathy and local oxidative stress values. The researchers intend to evaluate 56 patients with proliferative diabetic retinopathy undergoing the vitrectomy procedure, who will be assigned to a placebo group or combination antioxidant therapy. Each group will receive the intervention for 2 months. This intervention consists of taking one tablet (placebo or antioxidant therapy) orally, once a day. At the beginning of the study, only blood samples will be collected to evaluate the state of oxidative and metabolic stress at a systemic level. After 2 months of intervention, blood samples will be taken again on the day of the intervention, adding the samples of aqueous and vitreous humor obtained during the vitrectomy. The results obtained between both groups and the different analysis matrices will be compared.
Vertigo is a common complaint in the Emergency Department (ED). The differential diagnosis of central and peripheral vertigo is a difficult issue that directly affects mortality. Magnetic resonance imaging (MRI) is the preferred diagnostic tool, but may not be suitable in all patients due to logistic and economic conditions. In this study, the investigators evaluated the role of thiol/disulfide homeostasis (TDH) parameters and ischemia modified albumin (IMA) levels to assist in the value of being used instead of MRI.
Aim of this study is to investigate the relationship between heme oxygenase-1 enzyme level and angiographically determined SYNTAX score in patients with suspected stable coronary artery disease. Consecutive patients who are deemed to undergo coronary angiography due to high pre test probability or evidence of cardiac ischemia in imaging studies will be included in the study. Patients with coronary artery bypass surgery history and severe comorbid illnesses such as active malignancy, chronic obstructive lung disease, stage 3-5 chronic renal failure will be excluded. Serum heme oxygenase levels will be measured by ELISA method and SYNTAX score will be calculated from coronary angiography.
Peripheral arterial disease (PAD) is an important manifestation of systemic atherosclerosis and is characterized by obstruction of the arteries of the lower extremities. PAD is usually associated with vascular complications that occur not only in peripheral circulation but also in cerebral and coronary trees (PubMed ID: 9892517). Endothelial dysfunction, reduced glucose oxidation, accumulation of toxic metabolites, alteration in nitric oxide (NO) generation and oxidative stress seem to play a role among the factors that contribute to reducing blood flow in PAD patients (PubMed ID: 17298965). Hypertension is a risk factor for vascular disorders, including PAD. In fact, it has been shown that 55% of PAD patients are hypertensive. (PubMed ID: 15579058) PAD and hypertension patients have a risk of cardiovascular and cerebrovascular mortality increased two to three times compared to healthy subjects. The alteration of platelet function is implicated in the development and progression of atherosclerosis, as well as in the pathogenesis of acute cardiac ischemic events. Platelet activation is increased in patients with PAD and hypertension compared to healthy controls, suggesting a pro-thrombotic state. Polyphenols are a class of natural, synthetic and semisynthetic substances with beneficial effects on human health. In particular, the polyphenols exert their beneficial effect through 1) the inhibition of NADPH oxidase (Nox2), which is crucial for the formation of reactive oxygen species (ROS); 2) an antiplatelet effects 3) the activation of autophagy. Trehalose is a natural disaccharide that performs multiple functions such as a protective action against oxidative stress, temperature changes, accumulation of protein aggregates and dehydration. Furthermore, recent evidence has shown that trehalose could prevent inflammatory responses induced by endotoxic shock both in vivo and in vitro. Therefore the purpose of this work will be to determine in PAD and hypertension patients the effect of the intake of trehalose and a polyphenol mix on oxidative stress biomarkers, autophagic activity and endothelial dysfunction.
The composition of a food or a meal consumed plays an important role in the rate of postprandial endocrine and metabolic response, especially if high in fats, sugars and total energy content and a reduction in its entity is related to beneficial effects towards the prevention of several chronical diseases. The physiological postprandial response depends on several factors, both intrinsic, such as natural characteristic of food, and extrinsic, such as the way in which food is processed. This study aims at investigating postprandial hormonal, metabolic, oxidative stress, inflammation and endotoxaemia responses after the consumption of different commercial confectionary products made with different reformulation (ingredients and/or processing techniques).The principal scope of the study is to evaluate the impact of the reformulation of different snacks on postprandial responses. The investigators therefore designed a randomized controlled crossover trial, in which 15 healthy volunteers will consume different isocaloric confectionary products (snacks) and their related reformulation (total products number = 6) and a reference snack. Venous blood samples will be collected until 4-h after meal consumption. In order to evaluate postprandial hormonal, metabolic, oxidative stress, inflammation and endotoxaemia responses several markers will be evaluate: - metabolic substrates: glucose; Triglycerides and NEFA; - hormones: insulin; c-peptide; GLP-1, GIP, leptin, ghrelin, PYY; - markers of inflammation: IL-6, IL-8, IL-10, IL-17, TNF-α, hsCRP, MCP-1; - markers of oxidative stress and antioxidant capacity: GSH, FRAP; - endotoxaemia: lipopolysaccharides (LPS). These results will contribute to a detailed evaluation of the effects of reformulation on physiological events after meal consumption, leading to clarify if these variations in ingredients and/or processing techniques can modify postprandial responses, making them more similar to those originated from the reference snack.
The present study will investigate the effect of prior walking on postprandial metabolism and endothelial function in centrally obese South Asian and White European men. Participants will complete two, 2-day trials in a random, crossover design separated by at least a week. On day 1, participants will either rest or complete a 60 minute walk at 60% maximal oxygen uptake. On day 2, participants will arrive at 08:00 having fasted overnight and a baseline venous blood sample and endothelial function measurement will be taken. Participants will consume a high-fat breakfast and lunch and 12 subsequent venous blood samples will be taken throughout the day at standardised intervals to measure a variety of coronary heart disease risk markers. A second endothelial function measurement will be completed 2 hours after the breakfast. Blood pressure will be measured every hour. It is expected that the South Asian participants will have impaired metabolism and endothelial function compared to their European counterparts but the bout of exercise performed on day 1 will mitigate these responses.
The accumulation of unpaired α-globin chains in β-thalassemia major patients may clinically create ineffective erythropoiesis, hemolysis, and chronic anemia. Multiple blood transfusions and iron overload cause cellular oxidative damage. However, α-tocopherol, an antioxidant, has been known as a potent scavenger of lipid radicals in the red cell membrane of β-thalassemia major patient. By this randomized controlled trial, the investigators would like to evaluate the effects of α-tocopherol in hemolysis and oxidative stress on the red cell membrane of β-thalassemia major.
This is an interventional randomized, controlled trial in analyzing the effects of astaxanthin supplementation on plasma malondialdehyde levels and NIHSS of acute ischemic stroke patients. According to published studies, it was hypothesized that acute ischemic stroke patients who were given astaxanthin would have lower plasma malondialdehyde levels and lower NIHSS score compared to the control group.